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Institutional Ownership · SEC Form 13F

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.

286
Institutional holders
71,554,784
Shares held (tracked funds)

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).

FundSharesReported value% of valueQuarter
RA CAPITAL MANAGEMENT, L.P.6,666,837$580M7.9%2026-Q1
BAKER BROS. ADVISORS LP5,604,483$487M6.6%2026-Q1
BlackRock, Inc. trimmed4,095,040$356M4.9%2026-Q1
PRIMECAP MANAGEMENT CO/CA/ trimmed3,417,509$297M4.1%2026-Q1
VANGUARD PORTFOLIO MANAGEMENT LLC new3,040,718$264M3.6%2026-Q1
VANGUARD CAPITAL MANAGEMENT LLC new2,967,825$258M3.5%2026-Q1
PERCEPTIVE ADVISORS LLC trimmed2,373,795$206M2.8%2026-Q1
STATE STREET CORP added2,271,851$198M2.7%2026-Q1
GOLDMAN SACHS GROUP INC added1,965,432$171M2.3%2026-Q1
WESTFIELD CAPITAL MANAGEMENT CO LP added1,929,123$168M2.3%2026-Q1
PRICE T ROWE ASSOCIATES INC /MD/ added1,654,876$144M2.0%2026-Q1
FMR LLC trimmed1,653,954$144M2.0%2026-Q1
Polar Capital Holdings Plc added1,615,586$141M1.9%2026-Q1
CITADEL ADVISORS LLC added1,418,619$123M1.7%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC added1,416,269$123M1.7%2026-Q1
JPMORGAN CHASE & CO added1,553,644$120M1.6%2026-Q1
FEDERATED HERMES, INC. trimmed1,286,303$112M1.5%2026-Q1
Checkpoint Capital L.P. added1,227,200$107M1.5%2026-Q1
ALLIANCEBERNSTEIN L.P. trimmed910,413$97M1.3%2026-Q1
Capital Research Global Investors added1,115,460$97M1.3%2026-Q1
JANUS HENDERSON GROUP PLC trimmed918,153$80M1.1%2026-Q1
Point72 Asset Management, L.P. added846,801$74M1.0%2026-Q1
Woodline Partners LP added758,891$66M0.9%2026-Q1
ADAGE CAPITAL PARTNERS GP, L.L.C. added725,744$63M0.9%2026-Q1
Siren, L.L.C. added725,511$63M0.9%2026-Q1
MORGAN STANLEY added703,978$61M0.8%2026-Q1
Rock Springs Capital Management LP trimmed689,748$60M0.8%2026-Q1
Pictet Asset Management Holding SA added667,046$57M0.8%2026-Q1
BANK OF AMERICA CORP /DE/ added628,667$55M0.7%2026-Q1
FRANKLIN RESOURCES INC trimmed626,845$55M0.7%2026-Q1
Clearbridge Investments, LLC added609,437$53M0.7%2026-Q1
Integral Health Asset Management, LLC added600,000$52M0.7%2026-Q1
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed541,450$47M0.6%2026-Q1
CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed526,459$46M0.6%2026-Q1
NORTHERN TRUST CORP added498,514$43M0.6%2026-Q1
LOOMIS SAYLES & CO L P trimmed465,102$40M0.6%2026-Q1
Candriam S.C.A. added464,340$40M0.6%2026-Q1
MILLENNIUM MANAGEMENT LLC added451,825$39M0.5%2026-Q1
Sofinnova Investments, Inc. added450,096$39M0.5%2026-Q1
Logos Global Management LP added450,000$39M0.5%2026-Q1
Driehaus Capital Management LLC trimmed436,546$38M0.5%2026-Q1
VANGUARD FIDUCIARY TRUST CO new421,911$37M0.5%2026-Q1
Opaleye Management Inc. trimmed123,000$35M0.5%2026-Q1
Artisan Partners Limited Partnership added390,669$34M0.5%2026-Q1
AMERIPRISE FINANCIAL INC added383,957$33M0.5%2026-Q1
LORD, ABBETT & CO. LLC trimmed348,953$30M0.4%2026-Q1
Invesco Ltd. added314,529$27M0.4%2026-Q1
ORBIMED ADVISORS LLC added314,100$27M0.4%2026-Q1
BRAIDWELL LP trimmed310,628$27M0.4%2026-Q1
SILVERARC CAPITAL MANAGEMENT, LLC added306,000$27M0.4%2026-Q1
Bank of New York Mellon Corp trimmed293,298$26M0.3%2026-Q1
Qube Research & Technologies Ltd trimmed277,943$24M0.3%2026-Q1
Squarepoint Ops LLC added262,968$23M0.3%2026-Q1
WELLINGTON MANAGEMENT GROUP LLP added258,884$23M0.3%2026-Q1
RENAISSANCE TECHNOLOGIES LLC trimmed258,011$22M0.3%2026-Q1
BNP PARIBAS FINANCIAL MARKETS added247,876$22M0.3%2026-Q1
Hood River Capital Management LLC added239,912$21M0.3%2026-Q1
VOYA INVESTMENT MANAGEMENT LLC trimmed233,810$20M0.3%2026-Q1
UBS Group AG trimmed231,650$20M0.3%2026-Q1
ADAR1 Capital Management, LLC added211,450$18M0.3%2026-Q1
SummitTX Capital, L.P. added165,599$14M0.2%2026-Q1
Connor, Clark & Lunn Investment Management Ltd. added151,842$13M0.2%2026-Q1
DEUTSCHE BANK AG\ added141,601$12M0.2%2026-Q1
M&G PLC added138,567$12M0.2%2026-Q1
PFM Health Sciences, LP added136,621$12M0.2%2026-Q1
NORGES BANK added223,484$12M0.2%2026-Q1
NEXTBio Capital Management LP added126,078$11M0.1%2026-Q1
NEW YORK STATE COMMON RETIREMENT FUND added125,207$11M0.1%2026-Q1
Nuveen, LLC added117,376$10M0.1%2026-Q1
SCHRODER INVESTMENT MANAGEMENT GROUP added131,674$10M0.1%2026-Q1
Russell Investments Group, Ltd. trimmed115,712$10M0.1%2026-Q1
Capital World Investors115,693$10M0.1%2026-Q1
Swiss National Bank added112,200$10M0.1%2026-Q1
AXIOM INVESTORS LLC /DE added91,749$8M0.1%2026-Q1
First Light Asset Management, LLC trimmed87,181$8M0.1%2026-Q1
FIRST TRUST ADVISORS LP trimmed85,506$7M0.1%2026-Q1
Aberdeen Group plc added79,357$7M0.1%2026-Q1
Granahan Investment Management, LLC added77,709$7M0.1%2026-Q1
NEUBERGER BERMAN GROUP LLC trimmed73,434$6M0.1%2026-Q1
WCM INVESTMENT MANAGEMENT, LLC added80,620$6M0.1%2026-Q1
RHUMBLINE ADVISERS trimmed69,858$6M0.1%2026-Q1
KENNEDY CAPITAL MANAGEMENT LLC added65,818$6M0.1%2026-Q1
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added65,806$6M0.1%2026-Q1
Universal- Beteiligungs- und Servicegesellschaft mbH trimmed62,936$5M0.1%2026-Q1
Blue Owl Capital Holdings LP new61,455$5M0.1%2026-Q1
XTX Topco Ltd added59,502$5M0.1%2026-Q1
VANGUARD GROUP INC added6,135,208$657M9.0%2025-Q4 stale
NEA Management Company, LLC2,909,956$311M4.2%2025-Q4 stale
ALKEON CAPITAL MANAGEMENT LLC1,017,700$103M1.4%2025-Q3 stale
JENNISON ASSOCIATES LLC added918,567$98M1.3%2025-Q4 stale
Frazier Life Sciences Management, L.P. trimmed678,760$36M0.5%2025-Q1 stale
Assenagon Asset Management S.A. trimmed224,128$23M0.3%2025-Q3 stale
First Turn Management, LLC new146,303$16M0.2%2025-Q4 stale
M&T Bank Corp new85,967$14M0.2%2025-Q4 stale
Zweig-DiMenna Associates LLC new81,600$9M0.1%2025-Q4 stale
Cormorant Asset Management, LP trimmed150,000$8M0.1%2025-Q1 stale
PANAGORA ASSET MANAGEMENT INC trimmed64,614$7M0.1%2025-Q3 stale
VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed60,575$6M0.1%2025-Q4 stale
STEMPOINT CAPITAL LP trimmed58,915$6M0.1%2025-Q4 stale
Informed Momentum Co LLC trimmed57,327$6M0.1%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.

HoldersTotal shares

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.

Learn how to read institutional ownership