{"transactions":[{"id":1135473,"issuer":{"id":79310,"kind":"organization","name":"ACELYRIN, Inc.","symbol":"SLRN"},"owners":[{"id":79332,"kind":"person","name":"Murugan Amar","position":1,"cik":"0001809916","reported_name":"Murugan Amar","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Employee Stock Option (right to buy)","published_at":"2025-05-23T16:10:27.000Z","date":"2025-05-21","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":525000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time each stock option that was outstanding and unexercised immediately prior to the Effective Time with a per share exercise price of $18.00 or less was assumed by Parent and converted into an option to purchase a number of shares of Parent Common Stock equal to (i) the number of shares subject to the option immediately prior to the Effective Time, multiplied by (ii) the Exchange Ratio, with any fractional shares rounded down to the nearest whole share, which stock option shall have an exercise price equal to (i) the per share exercise price for shares subject to the corresponding Company stock option immediately prior to the Effective Time, divided by (ii) the Exchange Ratio, rounded up to the nearest whole cent."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"1/4 of the shares subject to the option vest on November 13, 2025, and 1/48 of the shares subject to the option vests in equal monthly installments thereafter, subject to the Reporting Person's continued service."}],"balance_after":0,"derivative":{"exercise_price":4.73,"expiration_date":"2034-11-24","underlying":"Common Stock","underlying_shares":525000},"source":{"system":"sec-edgar","filing":"0001962918-25-000064","document":"wk-form4_1748031014.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1809916/000196291825000064/wk-form4_1748031014.xml","form_type":"4"}},{"id":1135472,"issuer":{"id":79310,"kind":"organization","name":"ACELYRIN, Inc.","symbol":"SLRN"},"owners":[{"id":79332,"kind":"person","name":"Murugan Amar","position":1,"cik":"0001809916","reported_name":"Murugan Amar","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Common Stock","published_at":"2025-05-23T16:10:27.000Z","date":"2025-05-21","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":121587,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On February 6, 2025, ACELYRIN, Inc., a Delaware corporation (the \"Company\"), entered into an Agreement and Plan of Merger (as amended on April 20, 2025, the \"Merger Agreement\") with Alumis, Inc., a Delaware corporation (\"Parent\"), and Arrow Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent (\"Merger Sub\"). Pursuant to the Merger Agreement, on May 21, 2025, Merger Sub merged with and into the Company (the \"Merger\"), with the Company surviving as a wholly owned subsidiary of Parent. At the effective time of the Merger (the \"Effective Time\"), each share of common stock, par value $0.00001 per share, of the Company issued and outstanding was converted into the right to receive 0.4814 (the \"Exchange Ratio\") shares of voting common stock of Parent, par value $0.0001 per share (\"Parent Common Stock\"), and cash in lieu of any fractional shares."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"(Continued from Footnote 1)  Pursuant to the Merger Agreement, at the Effective Time, each outstanding and unvested restricted stock unit (\"RSU\") immediately prior to the Effective Time was assumed by Parent and converted into an RSU award with respect to a number of shares of Parent Common Stock equal to (i) the total number of shares subject to the RSU immediately prior to the Effective Time multiplied by (ii) the Exchange Ratio, with any fractional shares rounded down to the nearest whole share. At the Effective Time, each outstanding and vested RSU immediately prior the Effective Time, including any RSU that became vested as a result of the Merger, was cancelled and converted into the right to receive the number of shares of Parent Common Stock equal to (i) the total number of shares subject to the RSU immediately prior to the Effective Time multiplied by (ii) the Exchange Ratio, with any fractional shares rounded down to the nearest whole share."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001962918-25-000064","document":"wk-form4_1748031014.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809916/000196291825000064/wk-form4_1748031014.xml","form_type":"4"}},{"id":1197197,"issuer":{"id":79310,"kind":"organization","name":"ACELYRIN, Inc.","symbol":"SLRN"},"owners":[{"id":79332,"kind":"person","name":"Murugan Amar","position":1,"cik":"0001809916","reported_name":"Murugan Amar","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Common Stock","published_at":"2025-03-19T18:06:52.000Z","date":"2025-03-17","kind":"sale","planned":false,"acquired":false,"shares":3913,"price":2.744,"value":10737.272,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to the Issuer's policy requiring sell-to-cover to satisfy certain tax obligations of the Reporting Person incurred with the vesting and settlement\nof certain Restricted Stock Units, and does not represent a discretionary sale by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices no more than $2.76 and no less than $2.71, inclusive. The Reporting Person\nundertakes 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\nseparate price within the range set forth in this footnote."}],"balance_after":121587,"source":{"system":"sec-edgar","filing":"0001962918-25-000029","document":"wk-form4_1742422007.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809916/000196291825000029/wk-form4_1742422007.xml","form_type":"4"}},{"id":1295654,"issuer":{"id":79310,"kind":"organization","name":"ACELYRIN, Inc.","symbol":"SLRN"},"owners":[{"id":79332,"kind":"person","name":"Murugan Amar","position":1,"cik":"0001809916","reported_name":"Murugan Amar","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Common Stock","published_at":"2025-01-24T17:58:20.000Z","date":"2025-01-23","kind":"grant","planned":false,"acquired":true,"shares":125000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents Restricted Stock Units (RSUs) that vest in twelve (12) equal quarterly installments over three (3) years, beginning on March 15, 2025, and continuing on June 15, September 15, and\nDecember 15, 2025, and on the same dates in each subsequent year, subject to the Reporting Person's continued service through each vesting date."}],"balance_after":125500,"source":{"system":"sec-edgar","filing":"0001962918-25-000005","document":"wk-form4_1737759494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809916/000196291825000005/wk-form4_1737759494.xml","form_type":"4"}},{"id":1349515,"issuer":{"id":79310,"kind":"organization","name":"ACELYRIN, Inc.","symbol":"SLRN"},"owners":[{"id":79332,"kind":"person","name":"Murugan Amar","position":1,"cik":"0001809916","reported_name":"Murugan Amar","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Employee Stock Option (right to buy)","published_at":"2024-11-27T17:17:21.000Z","date":"2024-11-25","kind":"grant","planned":false,"acquired":true,"shares":525000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"1/4 of the shares subject to the option vest on November 13, 2025, and 1/48 of the shares subject to the option vests in equal monthly installments thereafter, subject to the Reporting Person's continued service."}],"balance_after":525000,"derivative":{"exercise_price":4.73,"expiration_date":"2034-11-24","underlying":"Common 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connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on August 16, 2024 and August 19, 2024 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees."}],"balance_after":26827,"source":{"system":"sec-edgar","filing":"0000905148-24-002304","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1809916/000090514824002304/form4.xml","form_type":"4"}},{"id":1427762,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":79332,"kind":"person","name":"Murugan 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employees."}],"balance_after":26916,"source":{"system":"sec-edgar","filing":"0000905148-24-002304","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1809916/000090514824002304/form4.xml","form_type":"4"}},{"id":1427761,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":79332,"kind":"person","name":"Murugan Amar","position":1,"cik":"0001809916","reported_name":"Murugan Amar","relationship":{"officer":true,"officer_title":"EVP, Chief Legal Officer"}}],"security":"Common Stock","published_at":"2024-08-20T18:27:26.000Z","date":"2024-08-16","kind":"sale","planned":false,"acquired":false,"shares":877,"price":6.629,"value":5813.633,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on August 16, 2024 and August 19, 2024 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"This amount includes 4,507 shares purchased under the Issuer's Employee Stock Purchase Plan on May 31, 2024, and reflects the 1:25 reverse stock split effected by the Issuer on June 20, 2024."}],"balance_after":27108,"source":{"system":"sec-edgar","filing":"0000905148-24-002304","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809916/000090514824002304/form4.xml","form_type":"4"}},{"id":1509069,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":79332,"kind":"person","name":"Murugan Amar","position":1,"cik":"0001809916","reported_name":"Murugan Amar","relationship":{"officer":true,"officer_title":"EVP, Chief Legal Officer"}}],"security":"Common Stock","published_at":"2024-05-20T20:33:56.000Z","date":"2024-05-16","kind":"sale","planned":false,"acquired":false,"shares":32401,"price":0.617,"value":19991.417,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on May 16, 2024 and May 17, 2024 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees."}],"balance_after":695120,"source":{"system":"sec-edgar","filing":"0000905148-24-001559","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809916/000090514824001559/form4.xml","form_type":"4"}},{"id":1591931,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":79332,"kind":"person","name":"Murugan Amar","position":1,"cik":"0001809916","reported_name":"Murugan 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employees."}],"balance_after":727521,"source":{"system":"sec-edgar","filing":"0000905148-24-000909","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809916/000090514824000909/form4.xml","form_type":"4"}},{"id":1682868,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":79332,"kind":"person","name":"Murugan Amar","position":1,"cik":"0001809916","reported_name":"Murugan Amar","relationship":{"officer":true,"officer_title":"EVP, Chief Legal Officer"}}],"security":"Common Stock","published_at":"2024-01-09T16:40:34.000Z","date":"2024-01-08","kind":"grant","planned":false,"acquired":true,"shares":475000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These restricted stock units vest as to 1/8th of the total number of shares (rounded down to the next whole number of shares) on the second Quarterly Vesting Date (as defined below) following January 8, 2024, and as to 1/8th of the total number of shares (rounded down to the next whole number of shares) on the next seven Quarterly Vesting Dates, such that all of the shares shall be vested on the last Quarterly Vesting Date, subject to the reporting person's continuous service. \"Quarterly Vesting Date\" means March 1, May 15, August 15, and November 15 of each year, provided that if such date falls on a weekend or holiday, the Quarterly Vesting Date shall be the first business day after such date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 5,481 shares purchased under the Issuer's Employee Stock Purchase Plan on November 30, 2023."}],"balance_after":737565,"source":{"system":"sec-edgar","filing":"0000905148-24-000113","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809916/000090514824000113/form4.xml","form_type":"4"}},{"id":1734762,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":79332,"kind":"person","name":"Murugan Amar","position":1,"cik":"0001809916","reported_name":"Murugan Amar","relationship":{"officer":true,"officer_title":"EVP, Chief Legal Officer"}}],"security":"Common Stock","published_at":"2023-11-20T17:30:36.000Z","date":"2023-11-16","kind":"sale","planned":false,"acquired":false,"shares":8307,"price":0.389,"value":3231.423,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on November 16, 2023 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employee."}],"balance_after":257084,"source":{"system":"sec-edgar","filing":"0000905148-23-001511","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809916/000090514823001511/form4.xml","form_type":"4"}},{"id":1802023,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":79332,"kind":"person","name":"Murugan Amar","position":1,"cik":"0001809916","reported_name":"Murugan 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of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on August 16, 2023 and August 17, 2023 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employee."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 3,118 shares purchased under the Issuer's Employee Stock Purchase Plan on May 31, 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