Who owns RYTM (RYTM)
Which tracked institutional funds hold RYTM, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See RYTM company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
70 tracked funds added or opened RYTM while 120 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
RYTM’s largest tracked holder by dollar value, VANGUARD GROUP INC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes RYTM more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in RYTM divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 286 tracked filers holding RYTM, 166 increased or opened the position and 146 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in RYTM between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 30
- VANGUARD PORTFOLIO MANAGEMENT LLC$264M
- VANGUARD CAPITAL MANAGEMENT LLC$258M
- VANGUARD FIDUCIARY TRUST CO$37M
- BRAIDWELL LP$27M
- SCHRODER INVESTMENT MANAGEMENT GROUP$10M
- Aberdeen Group plc$7M
Full exits 23
- VANGUARD GROUP INC$657M
- NEA Management Company, LLC$311M
- JENNISON ASSOCIATES LLC$98M
- First Turn Management, LLC$16M
- M&T Bank Corp$14M
- Zweig-DiMenna Associates LLC$9M
Largest adds
- CITADEL ADVISORS LLC$107M
- WESTFIELD CAPITAL MANAGEMENT CO LP$32M
- BANK OF AMERICA CORP /DE/$31M
- Point72 Asset Management, L.P.$28M
- Squarepoint Ops LLC$19M
- MILLENNIUM MANAGEMENT LLC$19M
Largest trims
- BlackRock, Inc.$318M
- RA CAPITAL MANAGEMENT, L.P.$134M
- BAKER BROS. ADVISORS LP$112M
- Driehaus Capital Management LLC$100M
- PRIMECAP MANAGEMENT CO/CA/$75M
- PERCEPTIVE ADVISORS LLC$66M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | 6,666,837 | $580M | 7.9% | 2026-Q1 |
| BAKER BROS. ADVISORS LP | 5,604,483 | $487M | 6.6% | 2026-Q1 |
| BlackRock, Inc. trimmed | 4,095,040 | $356M | 4.9% | 2026-Q1 |
| PRIMECAP MANAGEMENT CO/CA/ trimmed | 3,417,509 | $297M | 4.1% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 3,040,718 | $264M | 3.6% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 2,967,825 | $258M | 3.5% | 2026-Q1 |
| PERCEPTIVE ADVISORS LLC trimmed | 2,373,795 | $206M | 2.8% | 2026-Q1 |
| STATE STREET CORP added | 2,271,851 | $198M | 2.7% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 1,965,432 | $171M | 2.3% | 2026-Q1 |
| WESTFIELD CAPITAL MANAGEMENT CO LP added | 1,929,123 | $168M | 2.3% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 1,654,876 | $144M | 2.0% | 2026-Q1 |
| FMR LLC trimmed | 1,653,954 | $144M | 2.0% | 2026-Q1 |
| Polar Capital Holdings Plc added | 1,615,586 | $141M | 1.9% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 1,418,619 | $123M | 1.7% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,416,269 | $123M | 1.7% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 1,553,644 | $120M | 1.6% | 2026-Q1 |
| FEDERATED HERMES, INC. trimmed | 1,286,303 | $112M | 1.5% | 2026-Q1 |
| Checkpoint Capital L.P. added | 1,227,200 | $107M | 1.5% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 910,413 | $97M | 1.3% | 2026-Q1 |
| Capital Research Global Investors added | 1,115,460 | $97M | 1.3% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC trimmed | 918,153 | $80M | 1.1% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 846,801 | $74M | 1.0% | 2026-Q1 |
| Woodline Partners LP added | 758,891 | $66M | 0.9% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. added | 725,744 | $63M | 0.9% | 2026-Q1 |
| Siren, L.L.C. added | 725,511 | $63M | 0.9% | 2026-Q1 |
| MORGAN STANLEY added | 703,978 | $61M | 0.8% | 2026-Q1 |
| Rock Springs Capital Management LP trimmed | 689,748 | $60M | 0.8% | 2026-Q1 |
| Pictet Asset Management Holding SA added | 667,046 | $57M | 0.8% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 628,667 | $55M | 0.7% | 2026-Q1 |
| FRANKLIN RESOURCES INC trimmed | 626,845 | $55M | 0.7% | 2026-Q1 |
| Clearbridge Investments, LLC added | 609,437 | $53M | 0.7% | 2026-Q1 |
| Integral Health Asset Management, LLC added | 600,000 | $52M | 0.7% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 541,450 | $47M | 0.6% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 526,459 | $46M | 0.6% | 2026-Q1 |
| NORTHERN TRUST CORP added | 498,514 | $43M | 0.6% | 2026-Q1 |
| LOOMIS SAYLES & CO L P trimmed | 465,102 | $40M | 0.6% | 2026-Q1 |
| Candriam S.C.A. added | 464,340 | $40M | 0.6% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 451,825 | $39M | 0.5% | 2026-Q1 |
| Sofinnova Investments, Inc. added | 450,096 | $39M | 0.5% | 2026-Q1 |
| Logos Global Management LP added | 450,000 | $39M | 0.5% | 2026-Q1 |
| Driehaus Capital Management LLC trimmed | 436,546 | $38M | 0.5% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 421,911 | $37M | 0.5% | 2026-Q1 |
| Opaleye Management Inc. trimmed | 123,000 | $35M | 0.5% | 2026-Q1 |
| Artisan Partners Limited Partnership added | 390,669 | $34M | 0.5% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 383,957 | $33M | 0.5% | 2026-Q1 |
| LORD, ABBETT & CO. LLC trimmed | 348,953 | $30M | 0.4% | 2026-Q1 |
| Invesco Ltd. added | 314,529 | $27M | 0.4% | 2026-Q1 |
| ORBIMED ADVISORS LLC added | 314,100 | $27M | 0.4% | 2026-Q1 |
| BRAIDWELL LP trimmed | 310,628 | $27M | 0.4% | 2026-Q1 |
| SILVERARC CAPITAL MANAGEMENT, LLC added | 306,000 | $27M | 0.4% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 293,298 | $26M | 0.3% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 277,943 | $24M | 0.3% | 2026-Q1 |
| Squarepoint Ops LLC added | 262,968 | $23M | 0.3% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP added | 258,884 | $23M | 0.3% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 258,011 | $22M | 0.3% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 247,876 | $22M | 0.3% | 2026-Q1 |
| Hood River Capital Management LLC added | 239,912 | $21M | 0.3% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 233,810 | $20M | 0.3% | 2026-Q1 |
| UBS Group AG trimmed | 231,650 | $20M | 0.3% | 2026-Q1 |
| ADAR1 Capital Management, LLC added | 211,450 | $18M | 0.3% | 2026-Q1 |
| SummitTX Capital, L.P. added | 165,599 | $14M | 0.2% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. added | 151,842 | $13M | 0.2% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 141,601 | $12M | 0.2% | 2026-Q1 |
| M&G PLC added | 138,567 | $12M | 0.2% | 2026-Q1 |
| PFM Health Sciences, LP added | 136,621 | $12M | 0.2% | 2026-Q1 |
| NORGES BANK added | 223,484 | $12M | 0.2% | 2026-Q1 |
| NEXTBio Capital Management LP added | 126,078 | $11M | 0.1% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 125,207 | $11M | 0.1% | 2026-Q1 |
| Nuveen, LLC added | 117,376 | $10M | 0.1% | 2026-Q1 |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 131,674 | $10M | 0.1% | 2026-Q1 |
| Russell Investments Group, Ltd. trimmed | 115,712 | $10M | 0.1% | 2026-Q1 |
| Capital World Investors | 115,693 | $10M | 0.1% | 2026-Q1 |
| Swiss National Bank added | 112,200 | $10M | 0.1% | 2026-Q1 |
| AXIOM INVESTORS LLC /DE added | 91,749 | $8M | 0.1% | 2026-Q1 |
| First Light Asset Management, LLC trimmed | 87,181 | $8M | 0.1% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 85,506 | $7M | 0.1% | 2026-Q1 |
| Aberdeen Group plc added | 79,357 | $7M | 0.1% | 2026-Q1 |
| Granahan Investment Management, LLC added | 77,709 | $7M | 0.1% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC trimmed | 73,434 | $6M | 0.1% | 2026-Q1 |
| WCM INVESTMENT MANAGEMENT, LLC added | 80,620 | $6M | 0.1% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 69,858 | $6M | 0.1% | 2026-Q1 |
| KENNEDY CAPITAL MANAGEMENT LLC added | 65,818 | $6M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 65,806 | $6M | 0.1% | 2026-Q1 |
| Universal- Beteiligungs- und Servicegesellschaft mbH trimmed | 62,936 | $5M | 0.1% | 2026-Q1 |
| Blue Owl Capital Holdings LP new | 61,455 | $5M | 0.1% | 2026-Q1 |
| XTX Topco Ltd added | 59,502 | $5M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 6,135,208 | $657M | 9.0% | 2025-Q4 stale |
| NEA Management Company, LLC | 2,909,956 | $311M | 4.2% | 2025-Q4 stale |
| ALKEON CAPITAL MANAGEMENT LLC | 1,017,700 | $103M | 1.4% | 2025-Q3 stale |
| JENNISON ASSOCIATES LLC added | 918,567 | $98M | 1.3% | 2025-Q4 stale |
| Frazier Life Sciences Management, L.P. trimmed | 678,760 | $36M | 0.5% | 2025-Q1 stale |
| Assenagon Asset Management S.A. trimmed | 224,128 | $23M | 0.3% | 2025-Q3 stale |
| First Turn Management, LLC new | 146,303 | $16M | 0.2% | 2025-Q4 stale |
| M&T Bank Corp new | 85,967 | $14M | 0.2% | 2025-Q4 stale |
| Zweig-DiMenna Associates LLC new | 81,600 | $9M | 0.1% | 2025-Q4 stale |
| Cormorant Asset Management, LP trimmed | 150,000 | $8M | 0.1% | 2025-Q1 stale |
| PANAGORA ASSET MANAGEMENT INC trimmed | 64,614 | $7M | 0.1% | 2025-Q3 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 60,575 | $6M | 0.1% | 2025-Q4 stale |
| STEMPOINT CAPITAL LP trimmed | 58,915 | $6M | 0.1% | 2025-Q4 stale |
| Informed Momentum Co LLC trimmed | 57,327 | $6M | 0.1% | 2025-Q4 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.