RHYTHM PHARMACEUTICALS, INC. - RYTM
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| Mar 27, 2026 | SCHEDULE 13G/A | The Vanguard Group | 0.0% | 0 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | RA Capital Management, L.P. | 9.9% | 6,666,837 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | Peter Kolchinsky | 9.9% | 6,666,837 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | Rajeev Shah | 9.9% | 6,666,837 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | RA Capital Healthcare Fund, L.P. | 9.9% | 6,666,837 | View |
| Feb 12, 2026 | SCHEDULE 13G/A | PRIMECAP MANAGEMENT CO/CA/ | 5.21% | 3,478,669 | View |
| Jan 30, 2026 | SCHEDULE 13G/A | The Vanguard Group | 9.3% | 6,210,916 | View |
| Nov 14, 2025 | SCHEDULE 13G/A | PRIMECAP MANAGEMENT CO/CA/ | 6.42% | 4,262,859 | View |
| Oct 30, 2025 | SCHEDULE 13G/A | The Vanguard Group | 7.52% | 4,996,427 | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.