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Institutional Ownership · SEC Form 13F

Who owns ORKA (ORKA)


Which tracked institutional funds hold ORKA, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ORKA 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.

184
Institutional holders
52,314,285
Shares held (tracked funds)

How the tape is positioned

The tracked-fund tape on ORKA is one-sided between 2025-Q4 and 2026-Q1: 101 added or opened and 15 trimmed or exited — on balance accumulating.

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

ORKA’s largest tracked holder by dollar value, FMR LLC, 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 ORKA more heavily than its largest holder by dollar value does.

Book-share is each fund’s reported value in ORKA 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 184 tracked filers holding ORKA, 127 increased or opened the position and 53 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 ORKA 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 28

  • VANGUARD CAPITAL MANAGEMENT LLC$91M
  • Bellevue Group AG$25M
  • VANGUARD PORTFOLIO MANAGEMENT LLC$17M
  • WESTFIELD CAPITAL MANAGEMENT CO LP$15M
  • VANGUARD FIDUCIARY TRUST CO$13M
  • Ikarian Capital, LLC$12M

Full exits 11

  • VANGUARD GROUP INC$66M
  • Commodore Capital LP$53M
  • Avoro Capital Advisors LLC$40M
  • Blackstone Inc.$35M
  • Point72 Asset Management, L.P.$18M
  • BRAIDWELL LP$3M

Largest adds

  • FMR LLC$143M
  • Venrock Adviser, LLC$78M
  • Fairmount Funds Management LLC$69M
  • BlackRock, Inc.$66M
  • Paradigm Biocapital Advisors LP$62M
  • VIKING GLOBAL INVESTORS LP$50M

Largest trims

  • Soleus Capital Management, L.P.$6M
  • Cable Car Capital, LP$2M
  • BARCLAYS PLC$1M
  • WELLS FARGO & COMPANY/MN$584K

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
FMR LLC added7,410,908$364M13.1%2026-Q1
Venrock Adviser, LLC4,148,428$203M7.3%2026-Q1
Fairmount Funds Management LLC3,705,262$182M6.5%2026-Q1
BlackRock, Inc. trimmed3,527,087$173M6.2%2026-Q1
VIKING GLOBAL INVESTORS LP2,666,690$131M4.7%2026-Q1
Paradigm Biocapital Advisors LP added2,320,316$114M4.1%2026-Q1
RTW INVESTMENTS, LP2,058,148$101M3.6%2026-Q1
Deep Track Capital, LP trimmed2,034,203$100M3.6%2026-Q1
Remedium Capital Partners, LLC added1,889,115$93M3.3%2026-Q1
VANGUARD CAPITAL MANAGEMENT LLC new1,859,631$91M3.3%2026-Q1
STATE STREET CORP added1,613,461$79M2.8%2026-Q1
PERCEPTIVE ADVISORS LLC trimmed1,395,501$68M2.5%2026-Q1
Avidity Partners Management LP added760,424$52M1.9%2026-Q1
Polar Capital Holdings Plc added1,047,693$51M1.8%2026-Q1
CITADEL ADVISORS LLC added1,007,537$49M1.8%2026-Q1
FRANKLIN RESOURCES INC added1,004,056$49M1.8%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC added954,867$47M1.7%2026-Q1
MERCER GLOBAL ADVISORS INC /ADV added802,470$39M1.4%2026-Q1
PRICE T ROWE ASSOCIATES INC /MD/ added727,449$36M1.3%2026-Q1
Woodline Partners LP added574,882$28M1.0%2026-Q1
Cormorant Asset Management, LP533,340$26M0.9%2026-Q1
Bellevue Group AG new507,008$25M0.9%2026-Q1
Affinity Asset Advisors, LLC trimmed499,673$25M0.9%2026-Q1
Synergy Asset Management, LLC added476,196$23M0.8%2026-Q1
SR One Capital Management, LP430,330$21M0.8%2026-Q1
Candriam S.C.A. added411,006$20M0.7%2026-Q1
VANGUARD PORTFOLIO MANAGEMENT LLC new350,892$17M0.6%2026-Q1
CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed321,949$16M0.6%2026-Q1
WESTFIELD CAPITAL MANAGEMENT CO LP new313,130$15M0.6%2026-Q1
NORTHERN TRUST CORP added299,044$15M0.5%2026-Q1
VANGUARD FIDUCIARY TRUST CO new257,071$13M0.5%2026-Q1
GOLDMAN SACHS GROUP INC added246,711$12M0.4%2026-Q1
Ikarian Capital, LLC added242,021$12M0.4%2026-Q1
Atika Capital Management LLC new229,900$11M0.4%2026-Q1
UBS Group AG trimmed212,271$10M0.4%2026-Q1
Cable Car Capital, LP trimmed200,000$10M0.4%2026-Q1
ADAGE CAPITAL PARTNERS GP, L.L.C. added190,030$9M0.3%2026-Q1
Holocene Advisors, LP new185,513$9M0.3%2026-Q1
Alyeska Investment Group, L.P. added184,863$9M0.3%2026-Q1
GREAT POINT PARTNERS LLC183,330$9M0.3%2026-Q1
JENNISON ASSOCIATES LLC new176,680$9M0.3%2026-Q1
MORGAN STANLEY added175,454$9M0.3%2026-Q1
PFM Health Sciences, LP new174,052$9M0.3%2026-Q1
SILVERARC CAPITAL MANAGEMENT, LLC trimmed150,908$7M0.3%2026-Q1
Jones Hill Capital LP new140,843$7M0.2%2026-Q1
DEUTSCHE BANK AG\ added140,789$7M0.2%2026-Q1
Longaeva Partners L.P. added136,884$7M0.2%2026-Q1
Moody Aldrich Partners LLC added135,061$7M0.2%2026-Q1
Sio Capital Management, LLC added132,496$6M0.2%2026-Q1
KENNEDY CAPITAL MANAGEMENT LLC added126,366$6M0.2%2026-Q1
Kalehua Capital Management LLC118,524$6M0.2%2026-Q1
WELLINGTON MANAGEMENT GROUP LLP added114,351$6M0.2%2026-Q1
DIMENSIONAL FUND ADVISORS LP new113,009$6M0.2%2026-Q1
Bank of New York Mellon Corp trimmed106,883$5M0.2%2026-Q1
ExodusPoint Capital Management, LP added101,354$5M0.2%2026-Q1
BANK OF AMERICA CORP /DE/ trimmed100,091$5M0.2%2026-Q1
Invesco Ltd. trimmed97,042$5M0.2%2026-Q1
Nuveen, LLC added86,938$4M0.2%2026-Q1
BARCLAYS PLC trimmed85,737$4M0.2%2026-Q1
Ensign Peak Advisors, Inc added79,380$4M0.1%2026-Q1
HighVista Strategies LLC new78,911$4M0.1%2026-Q1
TD Asset Management Inc trimmed75,696$4M0.1%2026-Q1
Aberdeen Group plc75,680$4M0.1%2026-Q1
B Group, Inc.75,000$4M0.1%2026-Q1
AMERICAN CENTURY COMPANIES INC added74,386$4M0.1%2026-Q1
MANUFACTURERS LIFE INSURANCE COMPANY, THE added72,563$4M0.1%2026-Q1
Secure Asset Management, LLC trimmed72,422$4M0.1%2026-Q1
BOOTHBAY FUND MANAGEMENT, LLC added67,481$3M0.1%2026-Q1
VOYA INVESTMENT MANAGEMENT LLC added66,600$3M0.1%2026-Q1
SUPERSTRING CAPITAL MANAGEMENT LP new63,591$3M0.1%2026-Q1
Palo Alto Investors LP59,985$3M0.1%2026-Q1
Informed Momentum Co LLC new59,946$3M0.1%2026-Q1
RHUMBLINE ADVISERS added46,356$2M0.1%2026-Q1
Russell Investments Group, Ltd. added45,459$2M0.1%2026-Q1
FRED ALGER MANAGEMENT, LLC new43,841$2M0.1%2026-Q1
Swiss National Bank43,000$2M0.1%2026-Q1
MARTINGALE ASSET MANAGEMENT L P new42,732$2M0.1%2026-Q1
Voleon Capital Management LP added40,539$2M0.1%2026-Q1
Rafferty Asset Management, LLC added40,487$2M0.1%2026-Q1
ALPS ADVISORS INC trimmed39,404$2M0.1%2026-Q1
Y-Intercept (Hong Kong) Ltd new36,912$2M0.1%2026-Q1
SCHRODER INVESTMENT MANAGEMENT GROUP29,184$1M0.0%2026-Q1
ALLIANCEBERNSTEIN L.P. added40,400$1M0.0%2026-Q1
Squarepoint Ops LLC trimmed24,463$1M0.0%2026-Q1
ENVESTNET ASSET MANAGEMENT INC added23,667$1M0.0%2026-Q1
SEI INVESTMENTS CO added22,840$1M0.0%2026-Q1
VANGUARD GROUP INC added2,162,345$66M2.4%2025-Q4 stale
Commodore Capital LP1,753,054$53M1.9%2025-Q4 stale
Avoro Capital Advisors LLC1,333,340$40M1.5%2025-Q4 stale
Blackstone Inc. added1,165,408$35M1.3%2025-Q4 stale
Point72 Asset Management, L.P. trimmed600,000$18M0.7%2025-Q4 stale
Frazier Life Sciences Management, L.P.583,327$7M0.2%2025-Q2 stale
Redmile Group, LLC trimmed386,963$4M0.1%2025-Q1 stale
BRAIDWELL LP trimmed84,795$3M0.1%2025-Q4 stale
D. E. Shaw & Co., Inc. trimmed76,415$2M0.1%2025-Q4 stale
MILLENNIUM MANAGEMENT LLC added58,723$2M0.1%2025-Q4 stale
Jefferies Financial Group Inc.64,991$1M0.0%2025-Q3 stale
TORONTO DOMINION BANK58,332$1M0.0%2025-Q3 stale
Verition Fund Management LLC new35,710$1M0.0%2025-Q4 stale
Financial Enhancement Group LLC trimmed31,293$1M0.0%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