Rhythm Pharmaceuticals Inc

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Rhythm Pharmaceuticals Inc
TickerRYTM
CIK #0001649904
CUSIP76243J105
SectorLife Sciences - Pharmaceutical Preparations
Address500 Boylston Street 11th Floor, Boston, MA 02116
Source [EDGAR]
Reg D Offering (Form D) Filed Raised Terms
Rhythm Pharmaceuticals Inc 2017-01-20 20.5 M Exemption: 506(b) · Remaining: $20,474,998 · Duration: More than one year · Revenue: Decline to Disclose
CIK Filing 2011 - 2026
[0001649904] 10-K
[0001649904] 10-Q
[0001649904] 3
[0001649904] 4
[0001649904] 5
[0001649904] 8-K
[0001649904] D
[0001649904] SC 13D
[0001649904] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Vanguard Capital Management LLC Rhythm Pharmaceuticals Inc [2026-04-30] 0.0
Perceptive Advisors LLC Rhythm Pharmaceuticals Inc [2024-11-14] 81948.6
Perceptive Advisors LLC Rhythm Pharmaceuticals Inc [2024-03-20] 81945.4
Vanguard Group Inc Rhythm Pharmaceuticals Inc [2024-02-13] 5.46
Perceptive Advisors LLC Rhythm Pharmaceuticals Inc [2024-02-12] 81945.5
BlackRock Inc Rhythm Pharmaceuticals Inc [2023-02-03] 6.6
State Street Corp Rhythm Pharmaceuticals Inc [2023-02-03] 5.64
BlackRock Inc Rhythm Pharmaceuticals Inc [2022-07-08] 2.3
Goldman Sachs Group Inc Rhythm Pharmaceuticals Inc [2022-01-24] 6.1
Federated Hermes Inc Rhythm Pharmaceuticals Inc [2021-02-12] 5.92
BlackRock Inc Rhythm Pharmaceuticals Inc [2020-02-07] 5.8
Wellington Management Group LLP Rhythm Pharmaceuticals Inc [2020-01-28] 7.56
Flynn James E Rhythm Pharmaceuticals Inc [2019-08-19] 4.22
RA Capital Management LLC Rhythm Pharmaceuticals Inc [2019-02-14] 5.7
Janus Henderson Group PLC Rhythm Pharmaceuticals Inc [2019-02-12] 0.5
Baker Bros Advisors LP Rhythm Pharmaceuticals Inc [2018-02-13] 7.5
Third Rock Ventures LP Rhythm Pharmaceuticals Inc [2018-02-13] 14.6
MPM BioVentures V LP Rhythm Pharmaceuticals Inc [2017-10-24] 0.5
OrbiMed Advisors LLC Rhythm Pharmaceuticals Inc [2017-10-20] 10.7
Pfizer Inc Rhythm Pharmaceuticals Inc [2017-10-18] 9.0
New Enterprise Associates 13 LP Rhythm Pharmaceuticals Inc [2017-10-13] 18.8
Flynn James E Rhythm Pharmaceuticals Inc [2017-10-10] 1.8
Form 3/4/5 Filer 2011 - 2026
Rhythm Pharmaceuticals Inc
Garfield Alastair
McGirr David W J
Good Jennifer L
Arbuckle Stuart A
Tetrault Lynn A
Jean Christophe
Smith Hunter C
German Christopher Paul
Popovits Kimberly J
Mazabraud Yann
Mathers Edward T
Lee Jennifer Kayden
Cramer Pamela J
Shulman Joseph
Meeker David P
Bedrosian Camille L
Roberts William T
Manning Linda Shapiro
Foley Todd
Stewart Murray
Kelner Simon
Shah Rajeev M
RA Capital Healthcare Fund LP
RA Capital Management LP
Kolchinsky Peter
Desikan Nithya
Gottesdiener Keith Michael
van der Ploeg Leonardus HT
TRV GP LLC
Third Rock Ventures LP
Starr Kevin P
Levin Mark J
Tepper Robert I
Third Rock Ventures GP LP
Exter Neil
OrbiMed Advisors LLC
OrbiMed Capital GP V LLC
Fiedorek Fred T
MPM BioVentures V LP
MPM BioVentures V GP LLC
Evnin Luke
Gadicke Ansbert
MPM BioVentures V LLC
MPM Asset Management Investors BV5 LLC
Deerfield Special Situations Fund LP
Deerfield Management Company LP
Deerfield Capital LP
Deerfield Mgmt III LP
Deerfield Private Design Fund III LP
Flynn James E
New Enterprise Associates 13 LP
NEA Partners 13 Limited Partnership
NEA 13 GP Ltd
Barrett M James
Barris Peter J
Baskett Forest
Kerins Patrick J
Mott David M
Sandell Scott D
Viswanathan Ravi
Pfizer Inc
Ipsen SA
Isaly Samuel D
Silverstein Jonathan
Hadley Harbor Master Investors Cayman LP
Baker Bros Advisors GP LLC
Baker Julian
Baker Felix
Baker Bros Advisors LP
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Mathers Edward T
Common Stock
2026-03-12 Other 4,199 $0.00
German Christopher Paul
Common Stock
2026-03-04 Sell 5,614 $89.56 502,790
German Christopher Paul
Stock Options (Right to Buy) · derivative
2026-03-04 Option exercise 1,500 $0.00
German Christopher Paul
Common Stock
2026-03-04 Option exercise 1,500 $17.97 26,955
Mathers Edward T
Common Stock
2026-03-02 Other 4,198 $0.00
Mazabraud Yann
Stock Options (Right to Buy) · derivative
2026-03-02 Grant 35,000 $0.00
Smith Hunter C
Common Stock
2026-03-02 Option exercise 6,099 $6.80 41,473
Smith Hunter C
Stock Options (Right to Buy) · derivative
2026-03-02 Option exercise 6,099 $0.00
German Christopher Paul
Restricted Stock Units · derivative
2026-03-01 Option exercise 1,162 $0.00
German Christopher Paul
Common Stock
2026-03-01 Option exercise 1,162
German Christopher Paul
Common Stock
2026-03-01 Tax withheld 342 $94.94 32,469
Smith Hunter C
Common Stock
2026-02-19 Sell 585 $103.28 60,419
Smith Hunter C
Common Stock
2026-02-19 Sell 1,692 $100.92 170,757
Smith Hunter C
Common Stock
2026-02-19 Sell 1,308 $100.27 131,153
Smith Hunter C
Common Stock
2026-02-19 Sell 800 $102.10 81,680
Smith Hunter C
Common Stock
2026-02-17 Sell 1,200 $99.42 119,304
Smith Hunter C
Common Stock
2026-02-17 Sell 200 $100.52 20,104
Smith Hunter C
Common Stock
2026-02-17 Sell 200 $103.84 20,768
Smith Hunter C
Common Stock
2026-02-17 Sell 1,069 $103.00 110,107
Smith Hunter C
Common Stock
2026-02-17 Sell 900 $101.70 91,530
showing 20 of 200 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 287 72,059,916
2025-12-31 282 71,257,573
2025-09-30 266 71,003,863
2025-06-30 232 65,951,948
2025-03-31 234 63,503,177
2024-12-31 208 64,037,229
2024-09-30 183 67,504,054
2024-06-30 170 69,500,530
2024-03-31 174 69,154,508
2023-12-31 174 67,567,637
2023-09-30 148 68,442,827
2023-06-30 118 66,218,006
Form 13F Holdings
Firm Period DFND Voting Shares
Assenagon Asset Management SA [2026-06-30] SOLE 186,491 186,491
Aspiriant LLC [2026-06-30] SOLE 6,930 27,960
Wedge Capital Management L L P/NC [2026-06-30] SOLE 19,287 23,422
Y-Intercept Hong Kong Ltd [2026-06-30] SOLE 7,925 7,925
Toth Financial Advisory Corp [2026-06-30] SOLE 0 7,800
E Ohman J or Asset Management AB [2026-06-30] SOLE 5,523 5,523
Avior Wealth Management LLC [2026-06-30] SOLE 0 5,440
PSP Research LLC [2026-06-30] SOLE 0 2,000
Elevation Wealth Partners LLC [2026-06-30] SOLE 0 1,971
Wealth Enhancement Advisory Services LLC [2026-06-30] SOLE 33 1,885
Farther Finance Advisors LLC [2026-06-30] SOLE 0 653
Gamma Investing LLC [2026-06-30] DFND 364 364
True Wealth Design LLC [2026-06-30] SOLE 0 147
First Horizon Corp [2026-06-30] DFND 0 53
Cedar Mountain Advisors LLC [2026-06-30] SOLE 0 51
Versant Capital Management Inc [2026-06-30] SOLE 36 36
IFP Advisors LLC [2026-06-30] SOLE 27 27
Fortitude Family Office LLC [2026-06-30] SOLE 21 21
Handelsbanken Fonder AB [2026-06-30] SOLE 0 18
Physician Wealth Advisors Inc [2026-06-30] SOLE 0 16
Dogwood Wealth Management LLC [2026-06-30] SOLE 11 11
LRI Investments LLC [2026-06-30] SOLE 6 6
Hughes Financial Services LLC [2026-06-30] SOLE 6 6
Ares Financial Consulting LLC [2026-06-30] SOLE 5 5
GHP Investment Advisors Inc [2026-06-30] SOLE 3 3
Dinuzzo Private Wealth Inc [2026-06-30] SOLE 0 1
MassMutual Private Wealth & Trust FSB [2026-06-30] SOLE 1 1
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