🕵️ Rhythm Pharmaceuticals, Inc. ($RYTM)
SEC insider & ownership activity, last 12 months · CIK 1649904 · every row links its SEC filing
Over the last 12 months insiders sold $41.7M with no open-market buying against it. Jennifer Kayden Lee sold $8.9M through a 10b5-1 trading plan in 1 lots (Aug). 2 planned sales are pending, the largest $1.3M (Pamela Cramer). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 9 sellers, $41.7M (55 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Jennifer Kayden Lee | 0 | – | 1 | $8.9M | Aug 13, 2026 |
| Hunter C. Smith | 0 | – | 26 | $8.8M | Aug 31, 2026 |
| Mazabraud Yann | 0 | – | 6 | $6.6M | Aug 12, 2026 |
| David P. Meeker | 0 | – | 5 | $5.1M | Sep 14, 2026 |
| Lynn A. Tetrault | 0 | – | 1 | $3.7M | Jun 22, 2026 |
| Joseph Shulman | 0 | – | 6 | $3.7M | Aug 13, 2026 |
| Pamela Cramer | 0 | – | 4 | $3.0M | Dec 11, 2025 |
| German Christopher Paul | 0 | – | 2 | $931K | May 15, 2026 |
| Garfield Alastair | 0 | – | 4 | $913K | Aug 13, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| RA Capital Management, L.P. | 9.9% | 13G | Feb 17, 2026 | filing ↗ | |
| Peter Kolchinsky | 9.9% | 13G | Feb 17, 2026 | filing ↗ | |
| Rajeev Shah | 9.9% | 13G | Feb 17, 2026 | filing ↗ | |
| RA Capital Healthcare Fund, L.P. | 9.9% | 13G | Feb 17, 2026 | filing ↗ | |
| Baker BROS. Advisors LP | 8.9% | 13G | May 15, 2025 | filing ↗ | |
| Baker BROS. Advisors (GP) LLC | 8.9% | 13G | May 15, 2025 | filing ↗ | |
| Julian C. Baker | 8.9% | 13G | May 15, 2025 | filing ↗ | |
| Felix J. Baker | 8.9% | 13G | May 15, 2025 | filing ↗ | |
| BlackRock, Inc. | 6.9% | 13G | Apr 24, 2025 | filing ↗ | |
| Primecap Management CO/CA/ | 5.2% | 13G | Feb 12, 2026 | filing ↗ | |
| Perceptive Advisors LLC | 5.1% | 13G | May 15, 2026 | filing ↗ | |
| Joseph Edelman | 5.1% | 13G | May 15, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.0% | 13G | Apr 30, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| David Meeker | $5.2M | Sep 14, 2026 | filing ↗ |
| Hunter Smith | $6.7M | Aug 31, 2026 | filing ↗ |
| Alastair Garfield | $913K | Aug 13, 2026 | filing ↗ |
| Joseph J. Shulman | $597K | Aug 13, 2026 | filing ↗ |
| Jennifer Kayden Lee | $8.9M | Aug 13, 2026 | filing ↗ |
| Yann Mazabraud | $6.4M | Aug 12, 2026 | filing ↗ |
| Pamela Cramer | $1.3M | Aug 11, 2026 | filing ↗ |
| Pamela Cramer | $407K | Aug 10, 2026 | filing ↗ |
| Lynn Tetrault | $3.6M | Jun 22, 2026 | filing ↗ |
| Camille L. Bedrosian | $5.8M | Mar 4, 2026 | filing ↗ |
| Camille L. Bedrosian | $3.2M | Mar 3, 2026 | filing ↗ |
| Hunter Smith | $2.0M | Feb 5, 2026 | filing ↗ |
| Hunter Smith | $352K | Feb 4, 2026 | filing ↗ |
| Pamela Cramer | $351K | Dec 11, 2025 | filing ↗ |
| Pamela Cramer | $346K | Nov 20, 2025 | filing ↗ |
| Pamela Cramer | $353K | Nov 10, 2025 | filing ↗ |
| Pamela Cramer | $1.9M | Nov 7, 2025 | filing ↗ |
| Joseph Shulman | $1.1M | Oct 30, 2025 | filing ↗ |
| Joseph Shulman | $314K | Oct 28, 2025 | filing ↗ |
| Joseph Shulman | $1.6M | Oct 16, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Aug 4, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 4, 2026 | filing ↗ |
| Other events (8.01) | Aug 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 4, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 24, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 13, 2026 | filing ↗ |
| Other events (8.01) | Jun 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 13, 2026 | filing ↗ |
| Earnings (2.02) | May 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 5, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 1, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 1, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 26, 2026 | filing ↗ |
| Other events (8.01) | Mar 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 26, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 19, 2026 | filing ↗ |
| Other events (8.01) | Mar 19, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 19, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 16, 2026 | filing ↗ |
| Other events (8.01) | Mar 16, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 16, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 2, 2026 | filing ↗ |
| Other events (8.01) | Mar 2, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 2, 2026 | filing ↗ |
| Earnings (2.02) | Feb 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 26, 2026 | filing ↗ |
| Earnings (2.02) | Jan 9, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 9, 2026 | filing ↗ |
| Other events (8.01) | Jan 9, 2026 | filing ↗ |