{"transactions":[{"id":3504253,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2019-06-03T16:00:34.000Z","date":"2019-05-31","kind":"exercise","acquired":true,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock options vest and become exercisable in 48 successive, equal monthly installments measured from August 3, 2015."}],"balance_after":8611,"derivative":{"exercise_price":4.59,"expiration_date":"2025-11-16","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001104659-19-033437","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919033437/a4.xml","form_type":"4"}},{"id":3504252,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2019-06-03T16:00:34.000Z","date":"2019-05-30","kind":"exercise","acquired":true,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock options vest and become exercisable in 48 successive, equal monthly installments measured from August 3, 2015."}],"balance_after":13611,"derivative":{"exercise_price":4.59,"expiration_date":"2025-11-16","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001104659-19-033437","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919033437/a4.xml","form_type":"4"}},{"id":3504251,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2019-06-03T16:00:34.000Z","date":"2019-05-31","kind":"sale","acquired":false,"shares":5000,"price":25.1,"value":125500.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $25.00 to $25.33, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Securities and Exchange Commission staff, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":42339,"source":{"system":"sec-edgar","filing":"0001104659-19-033437","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919033437/a4.xml","form_type":"4"}},{"id":3504250,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2019-06-03T16:00:34.000Z","date":"2019-05-31","kind":"exercise","acquired":true,"shares":5000,"price":4.59,"value":22950.0,"ownership":{"direct":true},"balance_after":47339,"source":{"system":"sec-edgar","filing":"0001104659-19-033437","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919033437/a4.xml","form_type":"4"}},{"id":3504249,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2019-06-03T16:00:34.000Z","date":"2019-05-30","kind":"sale","acquired":false,"shares":5000,"price":25.31,"value":126550.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $25.11 to $25.64, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Securities and Exchange Commission staff, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":42339,"source":{"system":"sec-edgar","filing":"0001104659-19-033437","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919033437/a4.xml","form_type":"4"}},{"id":3504248,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2019-06-03T16:00:34.000Z","date":"2019-05-30","kind":"exercise","acquired":true,"shares":5000,"price":4.59,"value":22950.0,"ownership":{"direct":true},"balance_after":47339,"source":{"system":"sec-edgar","filing":"0001104659-19-033437","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919033437/a4.xml","form_type":"4"}},{"id":3507195,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2019-05-30T16:01:24.000Z","date":"2019-05-29","kind":"exercise","acquired":true,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock options vest and become exercisable in 48 successive, equal monthly installments measured from August 3, 2015."}],"balance_after":18611,"derivative":{"exercise_price":4.59,"expiration_date":"2025-11-16","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001104659-19-032725","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919032725/a4.xml","form_type":"4"}},{"id":3507194,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2019-05-30T16:01:24.000Z","date":"2019-05-28","kind":"exercise","acquired":true,"shares":140,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The stock options vest and become exercisable in 48 successive, equal monthly installments measured from January 6, 2017."}],"balance_after":55290,"derivative":{"exercise_price":6.14,"expiration_date":"2027-04-04","underlying":"Common Stock","underlying_shares":140},"source":{"system":"sec-edgar","filing":"0001104659-19-032725","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919032725/a4.xml","form_type":"4"}},{"id":3507193,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2019-05-30T16:01:24.000Z","date":"2019-05-28","kind":"exercise","acquired":true,"shares":9860,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock options vest and become exercisable in 48 successive, equal monthly installments measured from August 3, 2015."}],"balance_after":23611,"derivative":{"exercise_price":4.59,"expiration_date":"2025-11-16","underlying":"Common Stock","underlying_shares":9860},"source":{"system":"sec-edgar","filing":"0001104659-19-032725","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919032725/a4.xml","form_type":"4"}},{"id":3507192,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2019-05-30T16:01:24.000Z","date":"2019-05-29","kind":"sale","acquired":false,"shares":5000,"price":25.51,"value":127550.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $25.18 to $26.02, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Securities and Exchange Commission staff, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":42339,"source":{"system":"sec-edgar","filing":"0001104659-19-032725","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919032725/a4.xml","form_type":"4"}},{"id":3507191,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2019-05-30T16:01:24.000Z","date":"2019-05-29","kind":"exercise","acquired":true,"shares":5000,"price":4.59,"value":22950.0,"ownership":{"direct":true},"balance_after":47339,"source":{"system":"sec-edgar","filing":"0001104659-19-032725","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919032725/a4.xml","form_type":"4"}},{"id":3507190,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2019-05-30T16:01:24.000Z","date":"2019-05-28","kind":"sale","acquired":false,"shares":10000,"price":25.38,"value":253800.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $25.01 to $26.10, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Securities and Exchange Commission staff, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":42339,"source":{"system":"sec-edgar","filing":"0001104659-19-032725","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919032725/a4.xml","form_type":"4"}},{"id":3507189,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2019-05-30T16:01:24.000Z","date":"2019-05-28","kind":"exercise","acquired":true,"shares":140,"price":6.14,"value":859.6,"ownership":{"direct":true},"balance_after":52339,"source":{"system":"sec-edgar","filing":"0001104659-19-032725","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919032725/a4.xml","form_type":"4"}},{"id":3507188,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2019-05-30T16:01:24.000Z","date":"2019-05-28","kind":"exercise","acquired":true,"shares":9860,"price":4.59,"value":45257.4,"ownership":{"direct":true},"balance_after":52199,"source":{"system":"sec-edgar","filing":"0001104659-19-032725","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919032725/a4.xml","form_type":"4"}},{"id":3653116,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2019-02-15T16:08:07.000Z","date":"2019-02-13","kind":"grant","acquired":true,"shares":70000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option was granted on February 13, 2019 and the shares underlying this option vest in sixteen equal quarterly installments beginning on May 13, 2019."}],"balance_after":70000,"derivative":{"exercise_price":29.78,"expiration_date":"2029-02-12","underlying":"Common Stock","underlying_shares":70000},"source":{"system":"sec-edgar","filing":"0001104659-19-009040","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919009040/a4.xml","form_type":"4"}},{"id":3691570,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2019-01-18T16:02:41.000Z","date":"2019-01-16","kind":"sale","acquired":false,"shares":200,"price":30,"value":6000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On January 16, 2019, Mr. Van der Ploeg sold 200 shares pursuant to a plan of disposition adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."}],"balance_after":42339,"source":{"system":"sec-edgar","filing":"0001104659-19-002494","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465919002494/a4.xml","form_type":"4"}},{"id":3772239,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2018-11-06T17:20:49.000Z","date":"2018-11-02","kind":"exercise","acquired":false,"shares":10000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The stock options vest and become exercisable in 48 successive, equal monthly installments measured from August 3, 2015."}],"balance_after":30894,"derivative":{"exercise_price":7.52,"expiration_date":"2025-12-30","underlying":"Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0001104659-18-066381","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918066381/a4.xml","form_type":"4"}},{"id":3772238,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2018-11-06T17:20:49.000Z","date":"2018-11-02","kind":"exercise","acquired":false,"shares":10000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The stock options vest and become exercisable in 48 successive, equal monthly installments measured from January 6, 2017."}],"balance_after":55430,"derivative":{"exercise_price":6.14,"expiration_date":"2027-04-04","underlying":"Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0001104659-18-066381","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918066381/a4.xml","form_type":"4"}},{"id":3772237,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2018-11-06T17:20:49.000Z","date":"2018-11-02","kind":"exercise","acquired":false,"shares":8200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock options vest and become exercisable in 48 successive, equal monthly installments measured from August 3, 2015."}],"balance_after":33471,"derivative":{"exercise_price":4.59,"expiration_date":"2025-11-16","underlying":"Common Stock","underlying_shares":8200},"source":{"system":"sec-edgar","filing":"0001104659-18-066381","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918066381/a4.xml","form_type":"4"}},{"id":3772236,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2018-11-06T17:20:49.000Z","date":"2018-11-02","kind":"sale","acquired":false,"shares":38000,"price":30.09,"value":1143420.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 2, 2018, Mr. Van der Ploeg sold 38,000 shares pursuant to a plan of disposition adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $30.00 to $30.31, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Securities and Exchange Commission staff, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":42539,"source":{"system":"sec-edgar","filing":"0001104659-18-066381","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918066381/a4.xml","form_type":"4"}},{"id":3772235,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2018-11-06T17:20:49.000Z","date":"2018-11-02","kind":"exercise","acquired":true,"shares":10000,"price":7.52,"value":75200.0,"ownership":{"direct":true},"balance_after":80539,"source":{"system":"sec-edgar","filing":"0001104659-18-066381","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918066381/a4.xml","form_type":"4"}},{"id":3772234,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2018-11-06T17:20:49.000Z","date":"2018-11-02","kind":"exercise","acquired":true,"shares":10000,"price":6.14,"value":61400.0,"ownership":{"direct":true},"balance_after":70539,"source":{"system":"sec-edgar","filing":"0001104659-18-066381","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918066381/a4.xml","form_type":"4"}},{"id":3772233,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2018-11-06T17:20:49.000Z","date":"2018-11-02","kind":"exercise","acquired":true,"shares":8200,"price":4.59,"value":37638.0,"ownership":{"direct":true},"balance_after":60539,"source":{"system":"sec-edgar","filing":"0001104659-18-066381","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918066381/a4.xml","form_type":"4"}},{"id":3806401,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2018-09-27T16:02:03.000Z","date":"2018-09-25","kind":"exercise","acquired":false,"shares":21800,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The stock options vest and become exercisable in 48 successive, equal monthly installments measured from August 3, 2015."}],"balance_after":41671,"derivative":{"exercise_price":4.59,"expiration_date":"2025-11-16","underlying":"Common Stock","underlying_shares":21800},"source":{"system":"sec-edgar","filing":"0001104659-18-059105","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918059105/a4.xml","form_type":"4"}},{"id":3806400,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2018-09-27T16:02:03.000Z","date":"2018-09-25","kind":"sale","acquired":false,"shares":6102,"price":31.86,"value":194409.72,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On September 25, 2018, Mr. Van der Ploeg sold 31,800 shares in multiple trades at prices ranging from $27.12 to $32.36 pursuant to a plan of disposition adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934 (the \"10b5-1 Plan\")."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"This transaction was executed in multiple trades at prices ranging from $31.36 to $32.05, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":52339,"source":{"system":"sec-edgar","filing":"0001104659-18-059105","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918059105/a4.xml","form_type":"4"}},{"id":3806399,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2018-09-27T16:02:03.000Z","date":"2018-09-25","kind":"sale","acquired":false,"shares":5304,"price":30.6,"value":162302.4,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On September 25, 2018, Mr. Van der Ploeg sold 31,800 shares in multiple trades at prices ranging from $27.12 to $32.36 pursuant to a plan of disposition adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934 (the \"10b5-1 Plan\")."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"This transaction was executed in multiple trades at prices ranging from $30.21 to $31.20, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":58441,"source":{"system":"sec-edgar","filing":"0001104659-18-059105","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918059105/a4.xml","form_type":"4"}},{"id":3806398,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2018-09-27T16:02:03.000Z","date":"2018-09-25","kind":"sale","acquired":false,"shares":7656,"price":29.81,"value":228225.36,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On September 25, 2018, Mr. Van der Ploeg sold 31,800 shares in multiple trades at prices ranging from $27.12 to $32.36 pursuant to a plan of disposition adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934 (the \"10b5-1 Plan\")."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades at prices ranging from $29.21 to $30.20, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":63745,"source":{"system":"sec-edgar","filing":"0001104659-18-059105","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918059105/a4.xml","form_type":"4"}},{"id":3806397,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2018-09-27T16:02:03.000Z","date":"2018-09-25","kind":"sale","acquired":false,"shares":9052,"price":28.88,"value":261421.76,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On September 25, 2018, Mr. Van der Ploeg sold 31,800 shares in multiple trades at prices ranging from $27.12 to $32.36 pursuant to a plan of disposition adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934 (the \"10b5-1 Plan\")."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $28.20 to $29.19, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":71401,"source":{"system":"sec-edgar","filing":"0001104659-18-059105","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918059105/a4.xml","form_type":"4"}},{"id":3806396,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2018-09-27T16:02:03.000Z","date":"2018-09-25","kind":"sale","acquired":false,"shares":3686,"price":27.45,"value":101180.7,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On September 25, 2018, Mr. Van der Ploeg sold 31,800 shares in multiple trades at prices ranging from $27.12 to $32.36 pursuant to a plan of disposition adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934 (the \"10b5-1 Plan\")."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $27.12 to $27.88, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Securities and Exchange Commission staff (the \"Staff\"), the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":80453,"source":{"system":"sec-edgar","filing":"0001104659-18-059105","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918059105/a4.xml","form_type":"4"}},{"id":3806395,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2018-09-27T16:02:03.000Z","date":"2018-09-25","kind":"exercise","acquired":true,"shares":21800,"price":4.59,"value":100062.0,"ownership":{"direct":true},"balance_after":84139,"source":{"system":"sec-edgar","filing":"0001104659-18-059105","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918059105/a4.xml","form_type":"4"}},{"id":3806394,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2018-09-27T16:02:03.000Z","date":"2018-06-29","kind":"gift","acquired":false,"shares":2000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Mr. Van der Ploeg is voluntarily reporting a gift transfer of shares of common stock."}],"balance_after":62339,"source":{"system":"sec-edgar","filing":"0001104659-18-059105","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918059105/a4.xml","form_type":"4"}},{"id":4051157,"issuer":{"id":3693,"kind":"organization","name":"RHYTHM PHARMACEUTICALS, INC.","symbol":"RYTM"},"owners":[{"id":157033,"kind":"person","name":"Van der Ploeg Leonardus H.T.","position":1,"cik":"0001615726","reported_name":"Van der Ploeg Leonardus H.T.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2018-02-16T16:02:26.000Z","date":"2018-02-14","kind":"grant","acquired":true,"shares":55000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option was granted on February 14, 2018 and the shares underlying this option vest in sixteen equal quarterly installments."}],"balance_after":55000,"derivative":{"exercise_price":25.79,"expiration_date":"2028-02-13","underlying":"Common Stock","underlying_shares":55000},"source":{"system":"sec-edgar","filing":"0001104659-18-010366","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1615726/000110465918010366/a4.xml","form_type":"4"}}]}