Insider holders · CIK 0001649904
RHYTHM PHARMACEUTICALS, INC. · RYTM
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| Ravi Viswanathan10% Owner | — | 4,909,956 | 4,909,956 | Oct 10, 2017 · 4:36 pm EDT | Form 4 |
| NEA Partners 13, Limited Partnership10% Owner | 4,909,956 | — | 4,909,956 | Oct 10, 2017 · 4:32 pm EDT | Form 4 |
| NEA 13 GP, Ltd10% Owner | 4,909,956 | — | 4,909,956 | Oct 10, 2017 · 4:32 pm EDT | Form 4 |
| NEW ENTERPRISE ASSOCIATES 13 LP10% Owner | 4,909,956 | — | 4,909,956 | Oct 10, 2017 · 4:32 pm EDT | Form 4 |
| Forest Baskett10% Owner | — | 4,909,956 | 4,909,956 | Oct 10, 2017 · 4:34 pm EDT | Form 4 |
| Scott D Sandell10% Owner | — | 4,909,956 | 4,909,956 | Oct 10, 2017 · 4:35 pm EDT | Form 4 |
| Patrick J Kerins10% Owner | — | 4,909,956 | 4,909,956 | Oct 10, 2017 · 4:34 pm EDT | Form 4 |
| David M Mott10% Owner | — | 4,909,956 | 4,909,956 | Oct 10, 2017 · 4:35 pm EDT | Form 4 |
| M James Barrett10% Owner | — | 4,909,956 | 4,909,956 | Oct 10, 2017 · 4:33 pm EDT | Form 4 |
| Peter J Barris10% Owner | — | 4,909,956 | 4,909,956 | Oct 10, 2017 · 4:33 pm EDT | Form 4 |
| Todd FoleyDirector | — | 3,074,893 | 3,074,893 | Feb 11, 2019 · 1:23 pm EST | Form 5 |
| Samuel D Isaly10% Owner | — | 2,901,295 | 2,901,295 | Oct 10, 2017 · 4:21 pm EDT | Form 4 |
| OrbiMed Capital GP V LLC10% Owner | — | 2,750,079 | 2,750,079 | May 24, 2018 · 4:13 pm EDT | Form 4 |
| ORBIMED ADVISORS LLC10% Owner | — | 2,750,079 | 2,750,079 | May 24, 2018 · 4:13 pm EDT | Form 4 |
| MPM ASSET MANAGEMENT INVESTORS BV5 LLC10% Owner | — | 2,696,392 | 2,696,392 | Oct 11, 2017 · 2:25 pm EDT | Form 4 |
| MPM BIOVENTURES V, L.P.10% Owner | — | 2,696,392 | 2,696,392 | Oct 11, 2017 · 2:25 pm EDT | Form 4 |
| MPM BIOVENTURES V LLC10% Owner | — | 2,696,392 | 2,696,392 | Oct 11, 2017 · 2:25 pm EDT | Form 4 |
| MPM BIOVENTURES V GP LLC10% Owner | — | 2,696,392 | 2,696,392 | Oct 11, 2017 · 2:25 pm EDT | Form 4 |
| Luke Evnin10% Owner | — | 2,696,392 | 2,696,392 | Oct 11, 2017 · 2:25 pm EDT | Form 4 |
| Ansbert Gadicke10% Owner | — | 2,696,392 | 2,696,392 | Oct 11, 2017 · 2:25 pm EDT | Form 4 |
| Baker Bros. Advisors (GP) LLCrelationship not stated | — | 1,878,242 | 1,878,242 | Oct 6, 2017 · 3:58 pm EDT | Form 4 |
| BAKER BROS. ADVISORS LPrelationship not stated | — | 1,878,242 | 1,878,242 | Oct 6, 2017 · 3:58 pm EDT | Form 4 |
| Felix Bakerrelationship not stated | — | 1,878,242 | 1,878,242 | Oct 6, 2017 · 3:58 pm EDT | Form 4 |
| Julian Bakerrelationship not stated | — | 1,878,242 | 1,878,242 | Oct 6, 2017 · 3:58 pm EDT | Form 4 |
| PFIZER INC10% Owner | 1,427,639 | — | 1,427,639 | Oct 10, 2017 · 4:22 pm EDT | Form 4 |
| Ipsen, S.A.10% Owner | — | 833,099 | 833,099 | Oct 10, 2017 · 4:22 pm EDT | Form 4 |
| Hadley Harbor Master Investors (Cayman) L.P.10% Owner | 545,256 | — | 545,256 | Oct 10, 2017 · 4:06 pm EDT | Form 4 |
| Keith Michael GottesdienerCEO and President | 525,617 | — | 525,617 | Feb 28, 2019 · 4:01 pm EST | Form 4 |
| Deerfield Mgmt III, L.P.10% Owner | — | 468,505 | 468,505 | Oct 10, 2017 · 9:40 am EDT | Form 4 |
| Deerfield Private Design Fund III, L.P.10% Owner | — | 468,505 | 468,505 | Oct 10, 2017 · 9:40 am EDT | Form 4 |
| Deerfield Special Situations Fund, L.P.10% Owner | — | 468,505 | 468,505 | Oct 10, 2017 · 9:40 am EDT | Form 4 |
| James E Flynn10% Owner | — | 468,505 | 468,505 | Oct 10, 2017 · 9:40 am EDT | Form 4 |
| Deerfield Mgmt L.P.10% Owner | — | 468,505 | 468,505 | Oct 10, 2017 · 9:40 am EDT | Form 4 |
| DEERFIELD MANAGEMENT CO10% Owner | — | 468,505 | 468,505 | Oct 10, 2017 · 9:40 am EDT | Form 4 |
| David P MeekerPresident and CEO | 239,258 | — | 239,258 | Sep 14, 2026 · 7:37 pm EDT | Form 4 |
| Fred T. FiedorekChief Medical Officer | 131,899 | — | 131,899 | Oct 4, 2017 · 4:42 pm EDT | Form 3 |
| Hunter C SmithChief Financial Officer | 114,024 | — | 114,024 | Sep 1, 2026 · 4:22 pm EDT | Form 4 |
| Third Rock Ventures GP, L.P.10% Owner | 99,105 | — | 99,105 | Sep 4, 2018 · 4:06 pm EDT | Form 4 |
| TRV GP, LLC10% Owner | 99,105 | — | 99,105 | Sep 4, 2018 · 4:06 pm EDT | Form 4 |
| THIRD ROCK VENTURES LP10% Owner | 99,105 | — | 99,105 | Sep 4, 2018 · 4:06 pm EDT | Form 4 |
| Kevin P Starr10% Owner | 99,105 | — | 99,105 | Sep 4, 2018 · 4:06 pm EDT | Form 4 |
| Robert I Tepper10% Owner | 99,105 | — | 99,105 | Sep 4, 2018 · 4:06 pm EDT | Form 4 |
| Mark J Levin10% Owner | 99,105 | — | 99,105 | Sep 4, 2018 · 4:06 pm EDT | Form 4 |
| Yann MazabraudEVP, Head of International | 55,655 | — | 55,655 | Aug 14, 2026 · 7:01 pm EDT | Form 4 |
| Leonardus H.T. Van der PloegChief Scientific Officer | 42,339 | — | 42,339 | Jan 18, 2019 · 4:02 pm EST | Form 4 |
| Joseph ShulmanChief Technical Officer | 15,915 | — | 15,915 | Aug 17, 2026 · 6:00 pm EDT | Form 4 |
| Nithya DesikanChief Commercial Officer | 14,534 | — | 14,534 | Aug 14, 2018 · 4:01 pm EDT | Form 4 |
| Lynn A. TetraultDirector | 11,712 | — | 11,712 | Jun 25, 2026 · 6:06 pm EDT | Form 4 |
| Stuart A ArbuckleDirector | 11,712 | — | 11,712 | Jun 25, 2026 · 6:03 pm EDT | Form 4 |
| Christophe JeanDirector | 11,712 | — | 11,712 | Jun 25, 2026 · 6:09 pm EDT | Form 4 |
| Jennifer L GoodDirector | 11,712 | — | 11,712 | Jun 25, 2026 · 6:01 pm EDT | Form 4 |
| David W J McGirrDirector | 11,712 | — | 11,712 | Jun 25, 2026 · 6:08 pm EDT | Form 4 |
| Alastair GarfieldChief Scientific Officer | 2,295 | — | 2,295 | Aug 17, 2026 · 5:57 pm EDT | Form 4 |
| Simon KelnerChief Human Resources Officer | 100 | — | 100 | Jun 8, 2018 · 4:03 pm EDT | Form 3 |
| Jennifer Kayden LeeEVP, Head of North America | 0 | — | 0 | Aug 14, 2026 · 7:04 pm EDT | Form 4 |
| Neil ExterDirector | — | 0 | 0 | Oct 12, 2017 · 5:16 pm EDT | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.