RHYTHM PHARMACEUTICALS INC. (RYTM) - Insider Holders & Insider Ownership

List of insiders holdings for RHYTHM PHARMACEUTICALS INC.:
  1. Shares directly owned by the insider.
  2. Shares indirectly owned by the insider.
  3. Total shares owned by the insider (sum of shares directly and indirectly owned).
  4. Total market value if available.
  5. Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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#Insider Holder NameReport
Date Time
Shares Owned
Directly
Indirectly
Total
Shares Owned
Filing
1RA CAPITAL MANAGEMENT L.P.
RA Capital Healthcare Fund LP
Kolchinsky Peter
Shah Rajeev M.
Former 10% Owner
2026-02-17 16:41:426,666,837
0
6,666,837Form 13G
2BAKER BROS. ADVISORS LP
Baker Bros. Advisors (GP) LLC
BAKER FELIX
BAKER JULIAN
Former 10% owner
2025-05-15 16:19:295,604,483
0
5,604,483Form 13G
3MOTT DAVID M
10% Owner
2017-10-10 16:35:080
4,909,956
4,909,956Form 4
4Viswanathan Ravi
10% Owner
2017-10-10 16:36:140
4,909,956
4,909,956Form 4
5SANDELL SCOTT D
10% Owner
2017-10-10 16:35:430
4,909,956
4,909,956Form 4
6KERINS PATRICK J
10% Owner
2017-10-10 16:34:380
4,909,956
4,909,956Form 4
7BASKETT FOREST
10% Owner
2017-10-10 16:34:070
4,909,956
4,909,956Form 4
8BARRIS PETER J
10% Owner
2017-10-10 16:33:330
4,909,956
4,909,956Form 4
9BARRETT M JAMES
10% Owner
2017-10-10 16:33:050
4,909,956
4,909,956Form 4
10MPM BIOVENTURES V L.P.
EVNIN LUKE
GADICKE ANSBERT
MPM ASSET MANAGEMENT INVESTORS BV5 LLC
MPM BIOVENTURES V GP LLC
MPM BIOVENTURES V LLC
10% Owner
2020-06-26 15:27:031,934,558
0
1,934,558Form 13D
11Flynn James E
Deerfield Mgmt L.P.
DEERFIELD MANAGEMENT CO
Deerfield Special Situations Fund L.P.
Deerfield Mgmt III L.P.
Deerfield Private Design Fund III L.P.
Possible Member of 10% Group
10% Owner
2022-02-11 16:17:091,867,467
0
1,867,467Form 13G
12ORBIMED ADVISORS LLC
OrbiMed Capital GP V LLC
See Remarks
10% Owner
2018-08-10 15:19:041,629,700
0
1,629,700Form 13D
13ORBIMED ADVISORS LLC
OrbiMed Capital GP V LLC
ISALY SAMUEL D
10% Owner
2018-08-10 15:19:041,629,700
0
1,629,700Form 13D
14PFIZER INC
10% Owner
2019-02-13 17:22:481,427,639
0
1,427,639Form 13G
15Foley Todd
Director
2021-03-16 17:13:080
909,258
909,258Form 4
16Ipsen S.A.
10% Owner
2017-10-10 16:22:250
833,099
833,099Form 4
17Gottesdiener Keith Michael
CEO & President
2020-03-11 16:01:46766,127
0
766,127Form 4
18Hadley Harbor Master Investors (Cayman) L.P.
10% Owner
2017-10-10 16:06:42545,256
0
545,256Form 4
19THIRD ROCK VENTURES LP
Third Rock Ventures GP L.P.
TRV GP LLC
STARR KEVIN P
TEPPER ROBERT I
LEVIN MARK J
10% Owner
2020-02-05 16:36:37323,526
0
323,526Form 13G
20Meeker David P
President and CEO
2026-02-13 17:52:16179,750
0
179,750Form 4
21Desikan Nithya
Chief Commercial Officer
2020-09-01 16:05:32141,563
0
141,563Form 4
22Smith Hunter C
Chief Financial Officer
2026-09-01 16:22:52117,837
0
117,837Form 4
23Mazabraud Yann
EVP, Head of International
2026-08-14 19:01:5991,530
0
91,530Form 4
24Manning Linda Shapiro
Chief Medical Officer
2022-02-11 21:34:1887,500
0
87,500Form 4
25Joshi Manher
Chief Medical Officer
2026-08-18 17:35:3875,000
0
75,000Form 4
26Stewart Murray
Chief Medical Officer
2021-02-16 17:27:4565,625
0
65,625Form 4
27Van der Ploeg Leonardus H.T.
Chief Scientific Officer
2019-06-03 16:00:3464,561
0
64,561Form 4
28Fiedorek Fred T.
Chief Medical Officer
2018-02-16 16:03:1150,000
0
50,000Form 4
29Kelner Simon
Chief Human Resources Officer
2021-02-16 17:28:3143,750
0
43,750Form 4
30Lee Jennifer Kayden
EVP, Head of North America
2026-08-14 19:04:4436,283
0
36,283Form 4
31Cramer Pamela J.
Chief Human Resources Officer
2026-02-13 17:45:4429,150
0
29,150Form 4
32Mathers Edward T
Director
2026-03-16 16:11:557,000
18,367
25,367Form 4
33Shulman Joseph
Chief Technical Officer
2026-08-17 18:00:2421,860
0
21,860Form 4
34GOOD JENNIFER L
Director
2026-06-25 18:01:3117,727
0
17,727Form 4
35Arbuckle Stuart A
Director
2026-06-25 18:03:0517,727
0
17,727Form 4
36TETRAULT LYNN A.
Director
2026-06-25 18:06:4817,727
0
17,727Form 4
37MCGIRR DAVID W J
Director
2026-06-25 18:08:1717,727
0
17,727Form 4
38JEAN CHRISTOPHE
Director
2026-06-25 18:09:3717,727
0
17,727Form 4
39Popovits Kimberly J
Director
2026-04-03 17:35:3817,065
0
17,065Form 4
40Roberts William T.
Chief Accounting Officer
2023-03-31 21:38:2012,872
0
12,872Form 4
41Bedrosian Camille L
Director
2025-06-26 16:56:0411,749
0
11,749Form 4
42Exter Neil
Director
2018-06-08 16:06:4610,000
0
10,000Form 4
43German Christopher Paul
Corporate Controller & CAO
2026-05-19 16:15:198,739
0
8,739Form 4
44Garfield Alastair
Chief Scientific Officer
2026-08-17 17:57:292,295
0
2,295Form 4
45NEW ENTERPRISE ASSOCIATES 13 LP
NEA Partners 13 Limited Partnership
NEA 13 GP Ltd
10% Owner
2024-04-30 19:31:210
0
0Form 13D
46SILVERSTEIN JONATHAN
Director
2017-10-10 16:21:100
0
0Form 4