RHYTHM PHARMACEUTICALS INC (RYTM): Institutional Ownership
Hedge funds and institutional managers reporting a position in RYTM · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
18
13F filers
Aggregate Value
$434.7M
Across holders
Last Price
$109.84
2026-06-26
Sector
Health Care
GICS
Holder activity8 new2 added8 reduced
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| PRIMECAP MANAGEMENT CO/CA/ CIK 0000763212 | Institutional Manager | 3.42M | $297.2M | 68.4% | 0.2% | Reduced | $-5.3M | Q1 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 0001165408 | Hedge Fund | 726K | $63.1M | 14.5% | 0.1% | Added | +$9.1M | Q1 2026 |
| Qube Research & Technologies Ltd CIK 0001729829 | Hedge Fund | 278K | $24.2M | 5.6% | 0.0% | Reduced | $-2.9M | Q1 2026 |
| RENAISSANCE TECHNOLOGIES LLC CIK 0001037389 | Hedge Fund | 258K | $22.4M | 5.2% | 0.0% | Reduced | $-7.2M | Q1 2026 |
| Walleye Capital LLC CIK 0001758720 | Hedge Fund | 50K | $5.1M | 1.2% | 0.0% | New | — | Q3 2025 |
| AQR CAPITAL MANAGEMENT LLC CIK 0001167557 | Hedge Fund | 58K | $5.1M | 1.2% | 0.0% | Added | +$5.1M | Q1 2026 |
| Schonfeld Strategic Advisors LLC CIK 0001665241 | Hedge Fund | 78K | $4.9M | 1.1% | 0.0% | New | — | Q2 2025 |
| BALYASNY ASSET MANAGEMENT LLC CIK 0001218710 | Hedge Fund | 53K | $4.6M | 1.1% | 0.0% | Reduced | $-1.7M | Q1 2026 |
| TUDOR INVESTMENT CORP ET AL CIK 0000923093 | Hedge Fund | 20K | $1.7M | 0.4% | 0.0% | New | — | Q1 2026 |
| ExodusPoint Capital Management, LP CIK 0001736225 | Hedge Fund | 18K | $1.5M | 0.4% | 0.0% | Reduced | $-5.0M | Q1 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 14K | $1.3M | 0.3% | 0.0% | Reduced | $-3.0M | Q1 2026 |
| MARSHALL WACE, LLP CIK 0001318757 | Hedge Fund | 10K | $837K | 0.2% | 0.0% | New | — | Q1 2026 |
| Hudson Bay Capital Management LP CIK 0001393825 | Hedge Fund | 9K | $793K | 0.2% | 0.0% | New | — | Q1 2026 |
| Verition Fund Management LLC CIK 0001454027 | Hedge Fund | 5K | $482K | 0.1% | 0.0% | New | — | Q4 2025 |
| Gotham Asset Management, LLC CIK 0001510387 | Hedge Fund | 5K | $422K | 0.1% | 0.0% | Reduced | $-261 | Q1 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 4K | $374K | 0.1% | 0.0% | New | — | Q1 2026 |
| Man Group plc CIK 0001637460 | Hedge Fund | 4K | $350K | 0.1% | 0.0% | Reduced | $-481K | Q1 2026 |
| Brevan Howard Capital Management LP CIK 0001512857 | Hedge Fund | 4K | $328K | 0.1% | 0.0% | New | — | Q1 2026 |
Reduced
Institutional Manager
$297.2M· 68.4% of total· 0.2% port· 3.42M sh· $-5.3M QoQ· Q1 2026
Added
Hedge Fund
$63.1M· 14.5% of total· 0.1% port· 726K sh· +$9.1M QoQ· Q1 2026
Reduced
Hedge Fund
$24.2M· 5.6% of total· 0.0% port· 278K sh· $-2.9M QoQ· Q1 2026
Reduced
Hedge Fund
$22.4M· 5.2% of total· 0.0% port· 258K sh· $-7.2M QoQ· Q1 2026
New
Hedge Fund
$5.1M· 1.2% of total· 0.0% port· 50K sh· — QoQ· Q3 2025
Added
Hedge Fund
$5.1M· 1.2% of total· 0.0% port· 58K sh· +$5.1M QoQ· Q1 2026
New
Hedge Fund
$4.9M· 1.1% of total· 0.0% port· 78K sh· — QoQ· Q2 2025
Reduced
Hedge Fund
$4.6M· 1.1% of total· 0.0% port· 53K sh· $-1.7M QoQ· Q1 2026
New
Hedge Fund
$1.7M· 0.4% of total· 0.0% port· 20K sh· — QoQ· Q1 2026
Reduced
Hedge Fund
$1.5M· 0.4% of total· 0.0% port· 18K sh· $-5.0M QoQ· Q1 2026
Reduced
Hedge Fund
$1.3M· 0.3% of total· 0.0% port· 14K sh· $-3.0M QoQ· Q1 2026
New
Hedge Fund
$837K· 0.2% of total· 0.0% port· 10K sh· — QoQ· Q1 2026
New
Hedge Fund
$793K· 0.2% of total· 0.0% port· 9K sh· — QoQ· Q1 2026
New
Hedge Fund
$482K· 0.1% of total· 0.0% port· 5K sh· — QoQ· Q4 2025
Reduced
Hedge Fund
$422K· 0.1% of total· 0.0% port· 5K sh· $-261 QoQ· Q1 2026
New
Hedge Fund
$374K· 0.1% of total· 0.0% port· 4K sh· — QoQ· Q1 2026
Reduced
Hedge Fund
$350K· 0.1% of total· 0.0% port· 4K sh· $-481K QoQ· Q1 2026
New
Hedge Fund
$328K· 0.1% of total· 0.0% port· 4K sh· — QoQ· Q1 2026