Rhythm Pharmaceuticals, Inc.
RYTM- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001649904
In the last 90 days, Rhythm Pharmaceuticals, Inc. insiders filed 0 open-market purchases and 6 sales; 305 institutions reported holding it in 13F filings for Q2 2026, worth $8.55B in total; Duquesne Family Office is the only superinvestor holding it.
13F holders, Q1 2023
Institutional positions in Rhythm Pharmaceuticals, Inc. as of Mar 31, 2023. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 126
- +11 vs. Q4 2022
- Shares held
- 60.3M
- −1.98M (−3.2%) vs. Q4 2022
- Total value
- $1.08B
- −$738.2M (−40.7%) vs. Q4 2022
- New holders
- 29
- 46 more added
- Sold out
- 18
- 24 more reduced
Compare with Q4 2022: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting RYTM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 305 | $8.55B |
| Q1 2026 | 285 | $6.42B |
| Q4 2025 | 281 | $7.80B |
| Q3 2025 | 264 | $7.20B |
| Q2 2025 | 227 | $4.20B |
| Q1 2025 | 228 | $3.44B |
| Q4 2024 | 203 | $3.63B |
| Q3 2024 | 176 | $3.55B |
| Q2 2024 | 165 | $2.85B |
| Q1 2024 | 167 | $2.95B |
| Q4 2023 | 169 | $3.07B |
| Q3 2023 | 144 | $1.56B |
| Q2 2023 | 116 | $1.09B |
| Q1 2023 | 126 | $1.08B |
| Q4 2022 | 115 | $1.81B |
| Q3 2022 | 101 | $1.45B |
| Q2 2022 | 90 | $190.8M |
| Q1 2022 | 111 | $562.7M |
| Q4 2021 | 98 | $483.6M |
| Q3 2021 | 97 | $626.3M |
| Q2 2021 | 105 | $905.6M |
| Q1 2021 | 124 | $1.01B |
Institutions, Q1 2023
Shares, value and share of portfolio for each institution holding Rhythm Pharmaceuticals, Inc.; share changes are against Q4 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Qube Research & Technologies Ltd | 291,314 | $5.20M | 0.03% | +110,757+61.3% | Added |
| Citigroup Inc | 339,955 | $6.06M | 0.01% | +64,394+23.4% | Added |
| Samsara BioCapital, LLC | 345,293 | $6.16M | 1.27% | 00.0% | Unchanged |
| Jane Street Group, LLC | 349,639 | $6.24M | 0.01% | +150,136+75.3% | Added |
| Bank of America Corp | 359,666 | $6.42M | 0.00% | +93,513+35.1% | Added |
| Citadel Advisors LLC | 365,040 | $6.51M | 0.01% | +294,342+416.3% | Added |
| Geode Capital Management, LLC | 472,761 | $8.43M | 0.00% | +14,251+3.1% | Added |
| Millennium Management LLC | 546,906 | $9.76M | 0.01% | +504,608+1,193.0% | Added |
| Assenagon Asset Management S.A. | 664,026 | $11.8M | 0.05% | +200,510+43.3% | Added |
| FMR LLC | 698,824 | $12.5M | 0.00% | −74,204−9.6% | Reduced |
| Opaleye Management Inc. | 735,000 | $13.1M | 3.93% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 784,555 | $14.0M | 0.02% | +90,513+13.0% | Added |
| Janus Henderson Group PLC | 1,097,573 | $19.6M | 0.01% | −142,580−11.5% | Reduced |
| Rock Springs Capital Management LP | 1,597,123 | $28.5M | 0.68% | −163,742−9.3% | Reduced |
| Polar Capital Holdings Plc | 1,750,000 | $31.2M | 0.23% | +500,000+40.0% | Added |
| Alkeon Capital Management LLC | 2,015,966 | $36.0M | 0.23% | −222,296−9.9% | Reduced |
| Frazier Life Sciences Management, L.P. | 2,164,739 | $38.6M | 2.80% | +270,739+14.3% | Added |
| State Street Corp | 2,612,188 | $46.6M | 0.00% | −568,510−17.9% | Reduced |
| Vanguard Group Inc | 2,648,136 | $47.2M | 0.00% | +51,822+2.0% | Added |
| NEA Management Company, LLC | 2,909,956 | $51.9M | 3.59% | −2,000,000−40.7% | Reduced |
| BlackRock Inc. | 3,780,599 | $67.4M | 0.00% | +56,885+1.5% | Added |
| Federated Hermes, Inc. | 3,891,683 | $69.4M | 0.17% | −2,412,799−38.3% | Reduced |
| Goldman Sachs Group Inc | 5,310,703 | $94.7M | 0.03% | +108,911+2.1% | Added |
| Ra Capital Management, L.P. | 5,516,067 | $98.4M | 2.23% | 00.0% | Unchanged |
| Baker Bros. Advisors LP | 6,498,267 | $115.9M | 0.63% | +143,659+2.3% | Added |
| Primecap Management Co | 7,607,311 | $135.7M | 0.12% | +696,169+10.1% | Added |
| Invesco Ltd. | 0 | $0 | 0.00% | −334,273−100.0% | Sold out |
| Altium Capital Management LP | 0 | $0 | 0.00% | −170,000−100.0% | Sold out |
| EAM Investors, LLC | 0 | $0 | 0.00% | −164,695−100.0% | Sold out |
| Parkman Healthcare Partners LLC | 0 | $0 | 0.00% | −157,862−100.0% | Sold out |
| Ensign Peak Advisors, Inc | 0 | $0 | 0.00% | −108,562−100.0% | Sold out |
| EAM Global Investors LLC | 0 | $0 | 0.00% | −62,623−100.0% | Sold out |
| Bell & Brown Wealth Advisors, LLC | 0 | $0 | 0.00% | −41,600−100.0% | Sold out |
| Candriam Luxembourg S.C.A. | 0 | $0 | 0.00% | −32,479−100.0% | Sold out |
| Fred Alger Management, LLC | 0 | $0 | 0.00% | −19,988−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −19,535−100.0% | Sold out |
| SEI Investments Co | 0 | $0 | 0.00% | −15,453−100.0% | Sold out |
| American Century Companies Inc | 0 | $0 | 0.00% | −9,041−100.0% | Sold out |
| Virginia Retirement Systems Et Al | 0 | $0 | 0.00% | −8,000−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −7,451−100.0% | Sold out |
| 683 Capital Management, LLC | 0 | $0 | 0.00% | −6,960−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −5,581−100.0% | Sold out |
| Sierra Capital LLC | 0 | $0 | 0.00% | −2,400−100.0% | Sold out |
| Vigilant Capital Management, LLC | 0 | $0 | 0.00% | −100−100.0% | Sold out |