Rhythm Pharmaceuticals, Inc. (RYTM) ownership: Top institutional holder: VANGUARD GROUP INC ($664.82M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 6210916.00 | $664.82M | 2025-12-31 |
| RA CAPITAL MANAGEMENT, L.P. | 6666837.00 | $579.81M | 2026-03-31 |
| BlackRock, Inc. | 6237151.00 | $542.45M | 2026-03-31 |
| BAKER BROS. ADVISORS LP | 5604483.00 | $487.42M | 2026-03-31 |
| NEA Management Company, LLC | 2909956.00 | $311.48M | 2025-12-31 |
| PRIMECAP MANAGEMENT CO/CA/ | 3417509.00 | $297.22M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 3040718.00 | $264.45M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2967825.00 | $258.11M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.