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These shares were purchased in multiple transactions at prices ranging from $5.93 to $6.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":746119,"source":{"system":"sec-edgar","filing":"0000899243-22-025909","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322025909/doc4.xml","form_type":"4"}},{"id":2214326,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-07-05T16:06:00.000Z","date":"2022-06-30","kind":"purchase","acquired":true,"shares":1550,"price":5.7558,"value":8921.49,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.635 to $5.89, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":745019,"source":{"system":"sec-edgar","filing":"0000899243-22-024972","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322024972/doc4.xml","form_type":"4"}},{"id":2221045,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-27T16:05:28.000Z","date":"2022-06-24","kind":"purchase","acquired":true,"shares":1000,"price":5.99,"value":5990.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.95 to $6.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":743469,"source":{"system":"sec-edgar","filing":"0000899243-22-024187","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322024187/doc4.xml","form_type":"4"}},{"id":2221044,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-27T16:05:28.000Z","date":"2022-06-23","kind":"purchase","acquired":true,"shares":500,"price":6,"value":3000.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":742469,"source":{"system":"sec-edgar","filing":"0000899243-22-024187","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322024187/doc4.xml","form_type":"4"}},{"id":2225223,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-21T16:05:42.000Z","date":"2022-06-17","kind":"purchase","acquired":true,"shares":385,"price":5.9692,"value":2298.142,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.85 to $6.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":741969,"source":{"system":"sec-edgar","filing":"0000899243-22-023332","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322023332/doc4.xml","form_type":"4"}},{"id":2225222,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-21T16:05:42.000Z","date":"2022-06-17","kind":"purchase","acquired":true,"shares":515,"price":5.9692,"value":3074.138,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.85 to $6.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":1012986,"source":{"system":"sec-edgar","filing":"0000899243-22-023332","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322023332/doc4.xml","form_type":"4"}},{"id":2225221,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-21T16:05:42.000Z","date":"2022-06-16","kind":"purchase","acquired":true,"shares":223,"price":5.448,"value":1214.904,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.40 to $5.53, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":741584,"source":{"system":"sec-edgar","filing":"0000899243-22-023332","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322023332/doc4.xml","form_type":"4"}},{"id":2225220,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-21T16:05:42.000Z","date":"2022-06-16","kind":"purchase","acquired":true,"shares":297,"price":5.448,"value":1618.056,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.40 to $5.53, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":1012471,"source":{"system":"sec-edgar","filing":"0000899243-22-023332","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322023332/doc4.xml","form_type":"4"}},{"id":2229798,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-16T16:05:13.000Z","date":"2022-06-15","kind":"purchase","acquired":true,"shares":1241,"price":5.3659,"value":6659.0819,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.03 to $5.77, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":741361,"source":{"system":"sec-edgar","filing":"0000899243-22-022785","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322022785/doc4.xml","form_type":"4"}},{"id":2229797,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-16T16:05:13.000Z","date":"2022-06-15","kind":"purchase","acquired":true,"shares":1659,"price":5.3659,"value":8902.0281,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.03 to $5.77, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":1012174,"source":{"system":"sec-edgar","filing":"0000899243-22-022785","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322022785/doc4.xml","form_type":"4"}},{"id":2229796,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-16T16:05:13.000Z","date":"2022-06-14","kind":"purchase","acquired":true,"shares":8961,"price":5.1733,"value":46357.9413,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.03 to $5.25, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":740120,"source":{"system":"sec-edgar","filing":"0000899243-22-022785","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322022785/doc4.xml","form_type":"4"}},{"id":2229795,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-16T16:05:13.000Z","date":"2022-06-14","kind":"purchase","acquired":true,"shares":11977,"price":5.1733,"value":61960.6141,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.03 to $5.25, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":1010515,"source":{"system":"sec-edgar","filing":"0000899243-22-022785","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322022785/doc4.xml","form_type":"4"}},{"id":2232470,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-14T16:05:38.000Z","date":"2022-06-13","kind":"purchase","acquired":true,"shares":4151,"price":5.1488,"value":21372.6688,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.045 to $5.21, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":731159,"source":{"system":"sec-edgar","filing":"0000899243-22-022373","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322022373/doc4.xml","form_type":"4"}},{"id":2232469,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-14T16:05:38.000Z","date":"2022-06-13","kind":"purchase","acquired":true,"shares":5548,"price":5.1488,"value":28565.5424,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.045 to $5.21, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":998538,"source":{"system":"sec-edgar","filing":"0000899243-22-022373","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322022373/doc4.xml","form_type":"4"}},{"id":2232468,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-14T16:05:38.000Z","date":"2022-06-10","kind":"purchase","acquired":true,"shares":2733,"price":4.9206,"value":13447.9998,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.80 to $5.34, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":727008,"source":{"system":"sec-edgar","filing":"0000899243-22-022373","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322022373/doc4.xml","form_type":"4"}},{"id":2232467,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-06-14T16:05:38.000Z","date":"2022-06-10","kind":"purchase","acquired":true,"shares":3653,"price":4.9206,"value":17974.9518,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.80 to $5.34, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":992990,"source":{"system":"sec-edgar","filing":"0000899243-22-022373","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322022373/doc4.xml","form_type":"4"}},{"id":2419060,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-02-01T16:05:37.000Z","date":"2022-01-31","kind":"purchase","acquired":true,"shares":523,"price":5.0493,"value":2640.7839,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.87 to $5.19, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":724275,"source":{"system":"sec-edgar","filing":"0000899243-22-003837","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322003837/doc4.xml","form_type":"4"}},{"id":2419059,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-02-01T16:05:37.000Z","date":"2022-01-31","kind":"purchase","acquired":true,"shares":714,"price":5.0493,"value":3605.2002,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.87 to $5.19, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":989337,"source":{"system":"sec-edgar","filing":"0000899243-22-003837","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322003837/doc4.xml","form_type":"4"}},{"id":2419058,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-02-01T16:05:37.000Z","date":"2022-01-28","kind":"purchase","acquired":true,"shares":11458,"price":4.4768,"value":51295.1744,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.28 to $4.80, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":723752,"source":{"system":"sec-edgar","filing":"0000899243-22-003837","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322003837/doc4.xml","form_type":"4"}},{"id":2419057,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-02-01T16:05:37.000Z","date":"2022-01-28","kind":"purchase","acquired":true,"shares":1505,"price":4.4768,"value":6737.584,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.28 to $4.80, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":988623,"source":{"system":"sec-edgar","filing":"0000899243-22-003837","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322003837/doc4.xml","form_type":"4"}},{"id":2422344,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-01-28T16:05:36.000Z","date":"2022-01-27","kind":"purchase","acquired":true,"shares":16272,"price":4.8227,"value":78474.9744,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.59 to $5.14, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":712294,"source":{"system":"sec-edgar","filing":"0000899243-22-003553","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322003553/doc4.xml","form_type":"4"}},{"id":2422343,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-01-28T16:05:36.000Z","date":"2022-01-26","kind":"purchase","acquired":true,"shares":19528,"price":5.0074,"value":97784.5072,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.90 to $5.17, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":696022,"source":{"system":"sec-edgar","filing":"0000899243-22-003553","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322003553/doc4.xml","form_type":"4"}},{"id":2436679,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-01-12T16:05:21.000Z","date":"2022-01-11","kind":"purchase","acquired":true,"shares":14728,"price":3.9981,"value":58884.0168,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.78 to $4.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (6) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":676494,"source":{"system":"sec-edgar","filing":"0000899243-22-001744","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322001744/doc4.xml","form_type":"4"}},{"id":2436678,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-01-12T16:05:21.000Z","date":"2022-01-11","kind":"purchase","acquired":true,"shares":76542,"price":3.9981,"value":306022.5702,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.78 to $4.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (5) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":987118,"source":{"system":"sec-edgar","filing":"0000899243-22-001744","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322001744/doc4.xml","form_type":"4"}},{"id":2436677,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-01-12T16:05:21.000Z","date":"2022-01-10","kind":"purchase","acquired":true,"shares":5960,"price":3.8344,"value":22853.024,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.775 to $3.92, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":661766,"source":{"system":"sec-edgar","filing":"0000899243-22-001744","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322001744/doc4.xml","form_type":"4"}},{"id":2436676,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-01-12T16:05:21.000Z","date":"2022-01-10","kind":"purchase","acquired":true,"shares":8719,"price":3.8344,"value":33432.1336,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.775 to $3.92, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":910576,"source":{"system":"sec-edgar","filing":"0000899243-22-001744","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322001744/doc4.xml","form_type":"4"}},{"id":2438796,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-01-10T16:05:47.000Z","date":"2022-01-07","kind":"purchase","acquired":true,"shares":3565,"price":3.8182,"value":13611.883,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.75 to $3.96, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":655806,"source":{"system":"sec-edgar","filing":"0000899243-22-001470","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322001470/doc4.xml","form_type":"4"}},{"id":2438795,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2022-01-10T16:05:47.000Z","date":"2022-01-07","kind":"purchase","acquired":true,"shares":5215,"price":3.8182,"value":19911.913,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.75 to $3.96, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":901857,"source":{"system":"sec-edgar","filing":"0000899243-22-001470","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924322001470/doc4.xml","form_type":"4"}},{"id":2732555,"issuer":{"id":1720,"kind":"organization","name":"Garrett Motion Inc.","symbol":"GTX"},"owners":[{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":1,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":2,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":3,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":4,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":5,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":80528,"kind":"person","name":"Levy Noah G.","position":6,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}}],"security":"Common Stock","published_at":"2021-05-04T00:10:02.000Z","date":"2021-04-30","kind":"other","acquired":false,"shares":1802095,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On September 20, 2020, Garrett Motion Inc. (the \"Issuer\") and certain of its subsidiaries (collectively, the \"Debtors\") each filed a voluntary petition for relief under chapter 11 of title 11 of the United States Code (the \"Bankruptcy Code\") in the United States Bankruptcy Court for the Southern District of New York (the \"Bankruptcy Court\"). On April 26, 2021, the Debtors filed an amended Chapter 11 plan of reorganization (the \"Plan\") and on April 9, 2021, the Issuer filed a supplement to the Plan (as amended on April 20, 2021 and April 22, 2021, the \"Plan Supplement\") with the Bankruptcy Court. On April 26, 2021, the Bankruptcy Court entered an order confirming the Plan (the \"Confirmation Order\") and, on April 30, 2021 (the \"Effective Date\") the conditions to effectiveness of the Plan were satisfied or waived and the Issuer emerged from bankruptcy."},{"field":"kind","element":"transactionCoding","label":"F2","text":"(Continued from footnote 1) On the Effective Date, all outstanding shares of the Issuer's common stock outstanding prior to the Effective Date were canceled, released, and extinguished, and of no further force or effect and without any need for a holder of such common stock to take further action with respect thereto. Accordingly, this Form 4 shall constitute an exit filing for the Reporting Persons with respect to the Issuer."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On September 20, 2020, Garrett Motion Inc. (the \"Issuer\") and certain of its subsidiaries (collectively, the \"Debtors\") each filed a voluntary petition for relief under chapter 11 of title 11 of the United States Code (the \"Bankruptcy Code\") in the United States Bankruptcy Court for the Southern District of New York (the \"Bankruptcy Court\"). On April 26, 2021, the Debtors filed an amended Chapter 11 plan of reorganization (the \"Plan\") and on April 9, 2021, the Issuer filed a supplement to the Plan (as amended on April 20, 2021 and April 22, 2021, the \"Plan Supplement\") with the Bankruptcy Court. On April 26, 2021, the Bankruptcy Court entered an order confirming the Plan (the \"Confirmation Order\") and, on April 30, 2021 (the \"Effective Date\") the conditions to effectiveness of the Plan were satisfied or waived and the Issuer emerged from bankruptcy."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"(Continued from footnote 1) On the Effective Date, all outstanding shares of the Issuer's common stock outstanding prior to the Effective Date were canceled, released, and extinguished, and of no further force or effect and without any need for a holder of such common stock to take further action with respect thereto. Accordingly, this Form 4 shall constitute an exit filing for the Reporting Persons with respect to the Issuer."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Newtyn Partners, LP (\"NP\") and Newtyn TE Partners, LP (\"NTE\") directly held 1,117,299 and 684,796 shares, respectively, of common stock of the Issuer. Newtyn Management, LLC (\"NM\") is the investment manager of NP and NTE. Newtyn Capital Partners, LP (\"NCP\") is the general partner to each of NP and NTE. Ledo Capital, LLC (\"Ledo\") is the general partner to NCP. Mr. Noah Levy is managing member to NM. NP, NTE, NM, NCP, Ledo and Mr. Levy are collectively referred to as the \"Reporting Persons.\""}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-21-017876","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1548707/000089924321017876/doc4.xml","form_type":"4"}},{"id":2910522,"issuer":{"id":1720,"kind":"organization","name":"Garrett Motion Inc.","symbol":"GTX"},"owners":[{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":1,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":2,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":3,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":4,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":5,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":80528,"kind":"person","name":"Levy Noah G.","position":6,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}}],"security":"Common Stock","published_at":"2021-01-12T02:10:11.000Z","date":"2021-01-08","kind":"purchase","acquired":true,"shares":62846,"price":4.663,"value":293050.898,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Newtyn Partners, LP (\"NP\") and Newtyn TE Partners, LP (\"NTE\") directly hold 1,117,299 and 684,796 shares, respectively, of common stock of Garrett Motion Inc. (the \"Company\"). Newtyn Management, LLC (\"NM\") is the investment manager of NP and NTE. Newtyn Capital Partners, LP (\"NCP\") is the general partner to each of NP and NTE. Ledo Capital, LLC (\"Ledo\") is the general partner to NCP. Mr. Noah Levy is managing member to NM. NP, NTE, NM, NCP, Ledo and Mr. Levy are collectively referred to as the \"Reporting Persons.\""}],"balance_after":1802095,"source":{"system":"sec-edgar","filing":"0000899243-21-001417","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1548707/000089924321001417/doc4.xml","form_type":"4"}},{"id":2910521,"issuer":{"id":1720,"kind":"organization","name":"Garrett Motion Inc.","symbol":"GTX"},"owners":[{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":1,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":2,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":3,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":4,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":5,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":80528,"kind":"person","name":"Levy Noah G.","position":6,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}}],"security":"Common Stock","published_at":"2021-01-12T02:10:11.000Z","date":"2021-01-07","kind":"purchase","acquired":true,"shares":16939,"price":4.734,"value":80189.226,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Newtyn Partners, LP (\"NP\") and Newtyn TE Partners, LP (\"NTE\") directly hold 1,117,299 and 684,796 shares, respectively, of common stock of Garrett Motion Inc. (the \"Company\"). Newtyn Management, LLC (\"NM\") is the investment manager of NP and NTE. Newtyn Capital Partners, LP (\"NCP\") is the general partner to each of NP and NTE. Ledo Capital, LLC (\"Ledo\") is the general partner to NCP. Mr. Noah Levy is managing member to NM. NP, NTE, NM, NCP, Ledo and Mr. Levy are collectively referred to as the \"Reporting Persons.\""}],"balance_after":1739249,"source":{"system":"sec-edgar","filing":"0000899243-21-001417","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1548707/000089924321001417/doc4.xml","form_type":"4"}},{"id":2910520,"issuer":{"id":1720,"kind":"organization","name":"Garrett Motion Inc.","symbol":"GTX"},"owners":[{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":1,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":2,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":3,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":4,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":5,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":80528,"kind":"person","name":"Levy Noah G.","position":6,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}}],"security":"Common Stock","published_at":"2021-01-12T02:10:11.000Z","date":"2021-01-06","kind":"purchase","acquired":true,"shares":67310,"price":4.629,"value":311577.99,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Newtyn Partners, LP (\"NP\") and Newtyn TE Partners, LP (\"NTE\") directly hold 1,117,299 and 684,796 shares, respectively, of common stock of Garrett Motion Inc. (the \"Company\"). Newtyn Management, LLC (\"NM\") is the investment manager of NP and NTE. Newtyn Capital Partners, LP (\"NCP\") is the general partner to each of NP and NTE. Ledo Capital, LLC (\"Ledo\") is the general partner to NCP. Mr. Noah Levy is managing member to NM. NP, NTE, NM, NCP, Ledo and Mr. Levy are collectively referred to as the \"Reporting Persons.\""}],"balance_after":1722310,"source":{"system":"sec-edgar","filing":"0000899243-21-001417","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1548707/000089924321001417/doc4.xml","form_type":"4"}},{"id":2910519,"issuer":{"id":1720,"kind":"organization","name":"Garrett Motion Inc.","symbol":"GTX"},"owners":[{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":1,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":2,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":3,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":4,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":5,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":80528,"kind":"person","name":"Levy Noah G.","position":6,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}}],"security":"Common Stock","published_at":"2021-01-12T02:10:11.000Z","date":"2021-01-04","kind":"sale","acquired":false,"shares":60112,"price":4.399,"value":264432.688,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Newtyn Partners, LP (\"NP\") and Newtyn TE Partners, LP (\"NTE\") directly hold 1,117,299 and 684,796 shares, respectively, of common stock of Garrett Motion Inc. (the \"Company\"). Newtyn Management, LLC (\"NM\") is the investment manager of NP and NTE. Newtyn Capital Partners, LP (\"NCP\") is the general partner to each of NP and NTE. Ledo Capital, LLC (\"Ledo\") is the general partner to NCP. Mr. Noah Levy is managing member to NM. NP, NTE, NM, NCP, Ledo and Mr. Levy are collectively referred to as the \"Reporting Persons.\""}],"balance_after":1655000,"source":{"system":"sec-edgar","filing":"0000899243-21-001417","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1548707/000089924321001417/doc4.xml","form_type":"4"}},{"id":2910518,"issuer":{"id":1720,"kind":"organization","name":"Garrett Motion Inc.","symbol":"GTX"},"owners":[{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":1,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":2,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":3,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":4,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":5,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}},{"id":80528,"kind":"person","name":"Levy Noah G.","position":6,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}}],"security":"Common Stock","published_at":"2021-01-12T02:10:11.000Z","date":"2021-01-04","kind":"purchase","acquired":true,"shares":60112,"price":4.402,"value":264613.024,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Newtyn Partners, LP (\"NP\") and Newtyn TE Partners, LP (\"NTE\") directly hold 1,117,299 and 684,796 shares, respectively, of common stock of Garrett Motion Inc. (the \"Company\"). Newtyn Management, LLC (\"NM\") is the investment manager of NP and NTE. Newtyn Capital Partners, LP (\"NCP\") is the general partner to each of NP and NTE. Ledo Capital, LLC (\"Ledo\") is the general partner to NCP. Mr. Noah Levy is managing member to NM. NP, NTE, NM, NCP, Ledo and Mr. Levy are collectively referred to as the \"Reporting Persons.\""}],"balance_after":1715112,"source":{"system":"sec-edgar","filing":"0000899243-21-001417","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1548707/000089924321001417/doc4.xml","form_type":"4"}},{"id":2958063,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-12-03T16:05:10.000Z","date":"2020-12-01","kind":"purchase","acquired":true,"shares":12417,"price":3.9991,"value":49656.8247,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.955 to $4.000, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":652241,"source":{"system":"sec-edgar","filing":"0000899243-20-032668","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320032668/doc4.xml","form_type":"4"}},{"id":2958062,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-12-03T16:05:10.000Z","date":"2020-12-01","kind":"purchase","acquired":true,"shares":17359,"price":3.9991,"value":69420.3769,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.955 to $4.000, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. 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The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":639824,"source":{"system":"sec-edgar","filing":"0000899243-20-032258","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320032258/doc4.xml","form_type":"4"}},{"id":2965127,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-11-27T16:05:14.000Z","date":"2020-11-24","kind":"purchase","acquired":true,"shares":40278,"price":3.65,"value":147014.7,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":879283,"source":{"system":"sec-edgar","filing":"0000899243-20-032258","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320032258/doc4.xml","form_type":"4"}},{"id":2979523,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-11-16T16:05:14.000Z","date":"2020-11-12","kind":"purchase","acquired":true,"shares":23556,"price":3.6451,"value":85863.9756,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. 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These shares were purchased in multiple transactions at prices ranging from $3.60 to $3.65, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. 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The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. 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Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":806071,"source":{"system":"sec-edgar","filing":"0000899243-20-022561","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320022561/doc4.xml","form_type":"4"}},{"id":3058521,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-08-13T16:05:48.000Z","date":"2020-08-12","kind":"purchase","acquired":true,"shares":834,"price":3.493,"value":2913.162,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. 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These shares were purchased in multiple transactions at prices ranging from $3.35 to $3.50, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. 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These shares were purchased in multiple transactions at prices ranging from $3.45 to $3.50, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":805717,"source":{"system":"sec-edgar","filing":"0000899243-20-022283","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320022283/doc4.xml","form_type":"4"}},{"id":3058518,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-08-13T16:05:48.000Z","date":"2020-08-11","kind":"purchase","acquired":true,"shares":8186,"price":3.4525,"value":28262.165,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.35 to $3.50, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":804551,"source":{"system":"sec-edgar","filing":"0000899243-20-022283","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320022283/doc4.xml","form_type":"4"}},{"id":3076147,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-07-24T18:59:01.000Z","date":"2020-07-22","kind":"purchase","acquired":true,"shares":40488,"price":3.0419,"value":123160.4472,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F3","text":"The purchase of the securities referenced in this Form 4 were conducted in a private transaction between Gary Crocker and certain family members and affiliates as the sellers and each of Western Standard Partners, L.P., Western Standard Partners QP, L.P., Newtyn Partners, LP, and Newton Partners TE, LP as the purchasers.  Gary Crocker is President and Chairman of Merrimack Pharmaceuticals, Inc. (the \"Company\").  Eric Andersen, a member of  the Company's Board of Directors, is Managing Member of Western Standard LLC, the investment manager for each of Western Standard Partners L.P. and Western Standard Partners QP L.P.  Noah Levy, a member of the Company's Board of Directors, is Managing Member of Newtyn Management, LLC, the investment manager for Newtyn Partners, LP, and Newton Partners TE, LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":580515,"source":{"system":"sec-edgar","filing":"0000899243-20-020427","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320020427/doc4.xml","form_type":"4"}},{"id":3076146,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-07-24T18:59:01.000Z","date":"2020-07-22","kind":"purchase","acquired":true,"shares":33435,"price":3.202,"value":107058.87,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F3","text":"The purchase of the securities referenced in this Form 4 were conducted in a private transaction between Gary Crocker and certain family members and affiliates as the sellers and each of Western Standard Partners, L.P., Western Standard Partners QP, L.P., Newtyn Partners, LP, and Newton Partners TE, LP as the purchasers.  Gary Crocker is President and Chairman of Merrimack Pharmaceuticals, Inc. (the \"Company\").  Eric Andersen, a member of  the Company's Board of Directors, is Managing Member of Western Standard LLC, the investment manager for each of Western Standard Partners L.P. and Western Standard Partners QP L.P.  Noah Levy, a member of the Company's Board of Directors, is Managing Member of Newtyn Management, LLC, the investment manager for Newtyn Partners, LP, and Newton Partners TE, LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":540027,"source":{"system":"sec-edgar","filing":"0000899243-20-020427","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320020427/doc4.xml","form_type":"4"}},{"id":3076145,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-07-24T18:59:01.000Z","date":"2020-07-22","kind":"purchase","acquired":true,"shares":56606,"price":3.0419,"value":172189.7914,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F3","text":"The purchase of the securities referenced in this Form 4 were conducted in a private transaction between Gary Crocker and certain family members and affiliates as the sellers and each of Western Standard Partners, L.P., Western Standard Partners QP, L.P., Newtyn Partners, LP, and Newton Partners TE, LP as the purchasers.  Gary Crocker is President and Chairman of Merrimack Pharmaceuticals, Inc. (the \"Company\").  Eric Andersen, a member of  the Company's Board of Directors, is Managing Member of Western Standard LLC, the investment manager for each of Western Standard Partners L.P. and Western Standard Partners QP L.P.  Noah Levy, a member of the Company's Board of Directors, is Managing Member of Newtyn Management, LLC, the investment manager for Newtyn Partners, LP, and Newton Partners TE, LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":796365,"source":{"system":"sec-edgar","filing":"0000899243-20-020427","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320020427/doc4.xml","form_type":"4"}},{"id":3076144,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-07-24T18:59:01.000Z","date":"2020-07-22","kind":"purchase","acquired":true,"shares":46745,"price":3.202,"value":149677.49,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F3","text":"The purchase of the securities referenced in this Form 4 were conducted in a private transaction between Gary Crocker and certain family members and affiliates as the sellers and each of Western Standard Partners, L.P., Western Standard Partners QP, L.P., Newtyn Partners, LP, and Newton Partners TE, LP as the purchasers.  Gary Crocker is President and Chairman of Merrimack Pharmaceuticals, Inc. (the \"Company\").  Eric Andersen, a member of  the Company's Board of Directors, is Managing Member of Western Standard LLC, the investment manager for each of Western Standard Partners L.P. and Western Standard Partners QP L.P.  Noah Levy, a member of the Company's Board of Directors, is Managing Member of Newtyn Management, LLC, the investment manager for Newtyn Partners, LP, and Newton Partners TE, LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":739759,"source":{"system":"sec-edgar","filing":"0000899243-20-020427","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320020427/doc4.xml","form_type":"4"}},{"id":3171675,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-04-22T14:30:07.000Z","date":"2020-04-21","kind":"purchase","acquired":true,"shares":591,"price":3.25,"value":1920.75,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":506592,"source":{"system":"sec-edgar","filing":"0000899243-20-011149","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320011149/doc4.xml","form_type":"4"}},{"id":3171674,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-04-22T14:30:07.000Z","date":"2020-04-21","kind":"purchase","acquired":true,"shares":833,"price":3.25,"value":2707.25,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":693014,"source":{"system":"sec-edgar","filing":"0000899243-20-011149","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320011149/doc4.xml","form_type":"4"}},{"id":3171673,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-04-22T14:30:07.000Z","date":"2020-04-20","kind":"purchase","acquired":true,"shares":965,"price":3.25,"value":3136.25,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":506001,"source":{"system":"sec-edgar","filing":"0000899243-20-011149","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320011149/doc4.xml","form_type":"4"}},{"id":3171672,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-04-22T14:30:07.000Z","date":"2020-04-20","kind":"purchase","acquired":true,"shares":1360,"price":3.25,"value":4420.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":692181,"source":{"system":"sec-edgar","filing":"0000899243-20-011149","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320011149/doc4.xml","form_type":"4"}},{"id":3179593,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-04-08T17:37:35.000Z","date":"2020-04-07","kind":"purchase","acquired":true,"shares":2448,"price":3.0318,"value":7421.8464,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.99 to $3.09, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":505036,"source":{"system":"sec-edgar","filing":"0000899243-20-010517","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320010517/doc4.xml","form_type":"4"}},{"id":3179592,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-04-08T17:37:35.000Z","date":"2020-04-07","kind":"purchase","acquired":true,"shares":3451,"price":3.0318,"value":10462.7418,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.99 to $3.09, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":690821,"source":{"system":"sec-edgar","filing":"0000899243-20-010517","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320010517/doc4.xml","form_type":"4"}},{"id":3180478,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-04-07T19:24:46.000Z","date":"2020-04-06","kind":"purchase","acquired":true,"shares":2507,"price":2.9965,"value":7512.2255,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.975 to $3.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (4) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":502588,"source":{"system":"sec-edgar","filing":"0000899243-20-010465","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320010465/doc4.xml","form_type":"4"}},{"id":3180477,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-04-07T19:24:46.000Z","date":"2020-04-06","kind":"purchase","acquired":true,"shares":3535,"price":2.9965,"value":10592.6275,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.975 to $3.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (4) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":687370,"source":{"system":"sec-edgar","filing":"0000899243-20-010465","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320010465/doc4.xml","form_type":"4"}},{"id":3180476,"issuer":{"id":95770,"kind":"organization","name":"MERRIMACK PHARMACEUTICALS INC","symbol":"MACK"},"owners":[{"id":80528,"kind":"person","name":"Levy Noah G.","position":1,"cik":"0001788608","reported_name":"Levy Noah G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See remarks"}},{"id":117350,"kind":"organization","name":"Newtyn Management, LLC","position":2,"cik":"0001569241","reported_name":"Newtyn Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120664,"kind":"organization","name":"NEWTYN PARTNERS, LP","position":3,"cik":"0001548707","reported_name":"NEWTYN PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120665,"kind":"organization","name":"NEWTYN TE PARTNERS, LP","position":4,"cik":"0001548709","reported_name":"NEWTYN TE PARTNERS, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120666,"kind":"organization","name":"Newtyn Capital Partners, LP","position":5,"cik":"0001789643","reported_name":"Newtyn Capital Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}},{"id":120667,"kind":"organization","name":"Ledo Capital, LLC","position":6,"cik":"0001789647","reported_name":"Ledo Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2020-04-07T19:24:46.000Z","date":"2020-04-03","kind":"purchase","acquired":true,"shares":4461,"price":2.5932,"value":11568.2652,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.46 to $2.70, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are directly held Newtyn TE. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. 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These shares were purchased in multiple transactions at prices ranging from $2.46 to $2.70, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are directly held by NP. The general partner of the Funds is NCP. The general partner of NCP is Ledo. The investment manager to the Funds is Newtyn Management. The managing member of Newtyn Management and Ledo and the portfolio manager to the Funds is Mr. Levy. Each of Newtyn Management, Ledo, NCP and Mr. Levy disclaims beneficial ownership of the shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."}],"balance_after":683835,"source":{"system":"sec-edgar","filing":"0000899243-20-010465","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1274792/000089924320010465/doc4.xml","form_type":"4"}}]}