RYTM

RHYTHM PHARMACEUTICALS INC
USCUSIP 76243J105
Institutional Owners
104
+24 QoQ
13F Value Held
$2.9B
Insider Net · 180d
$0
0↑ 0↓
Recent Filings
0
Smart-money sentimentMixed
BearishBullish
13F funds (latest Q)57 adding · 34 trimming
Insider net (180d)+$0
Price history not yet available for RYTM.

Top institutional holders

104 13F filers
#FundPosition valueSharesLast moveAs of
1RA CAPITAL MANAGEMENT, L.P.
$579.8M
6.67MHeldQ1 2026
2BAKER BROS. ADVISORS LP
$487.4M
5.60MHeldQ1 2026
3VANGUARD PORTFOLIO MANAGEMENT LLC
$264.5M
3.04MNewQ1 2026
4VANGUARD CAPITAL MANAGEMENT LLC
$258.1M
2.97MNewQ1 2026
5PERCEPTIVE ADVISORS LLC
$206.4M
2.37MNewQ1 2026
6STATE STREET CORP
$197.6M
2.27MAddedQ1 2026
7WESTFIELD CAPITAL MANAGEMENT CO LP
$167.8M
1.93MAddedQ1 2026
8Polar Capital Holdings Plc
$140.5M
1.62MAddedQ1 2026
9Point72 Asset Management, L.P.
$73.6M
846.8KAddedQ1 2026
10Woodline Partners LP
$66.0M
758.9KNewQ1 2026
11Siren, L.L.C.
$63.1M
725.5KAddedQ1 2026
12Rock Springs Capital Management LP
$60.0M
689.7KReducedQ1 2026
13Integral Health Asset Management, LLC
$52.2M
600.0KAddedQ1 2026
14Candriam S.C.A.
$40.4M
464.3KNewQ1 2026
15Sofinnova Investments, Inc.
$39.1M
450.1KAddedQ1 2026
16Logos Global Management LP
$39.1M
450.0KAddedQ1 2026
17VANGUARD FIDUCIARY TRUST CO
$36.7M
421.9KNewQ1 2026
18ORBIMED ADVISORS LLC
$27.3M
314.1KAddedQ1 2026
19BRAIDWELL LP
$27.0M
310.6KNewQ1 2026
20Hood River Capital Management LLC
$20.9M
239.9KAddedQ1 2026
21Connor, Clark & Lunn Investment Management Ltd.
$13.2M
151.8KAddedQ1 2026
22Granahan Investment Management, LLC
$6.8M
77.7KAddedQ1 2026
23Universal- Beteiligungs- und Servicegesellschaft mbH
$5.5M
62.9KReducedQ1 2026
24CASTLEARK MANAGEMENT LLC
$4.5M
52.3KReducedQ1 2026
25PICTON MAHONEY ASSET MANAGEMENT
$4.4M
50.4KNewQ1 2026

Fund activity — latest quarter

Opened (NEW)
30
funds
Added
27
funds
Reduced
24
funds
Exited
10
funds

Insider activity (Form 4)

No Form 4 insider transactions on file yet.

Institutional ownership over time

100 funds+99 since Q2 2022
050100Q2 2022Q1 2023Q4 2023Q3 2024Q2 2025Q1 2026
funds holding aggregate valuelatest $2.8B

Funds that own RYTM also own

CompanyCo-held byCombined value
Lilly Eli and CoLLY92 funds$44.3B
Microsoft Corp.MSFT89 funds$152.5B
Nvidia Corp. (US)NVDA88 funds$235.9B
Amazon.com IncAMZN88 funds$111.8B
GOOGLE INCGOOGL88 funds$91.7B
Broadcom LtdAVGO88 funds$82.4B
Meta Platforms Inc AMETA88 funds$69.4B
Intuitive Surgical Inc.ISRG87 funds$11.1B
Micron Technology Inc - USMU86 funds$27.1B
Gilead Sciences Inc.GILD86 funds$11.8B
Boston Scientific Corp.BSX86 funds$6.9B
Apple Inc.AAPL85 funds$200.2B

Ranked by how many of RYTM's institutional holders also hold each name — a cross-fund conviction signal. Via the MCP server (ticker.co_held).

Recent filings

0 shown

No filings captured for this ticker in the live stream yet.

13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for RYTM. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.