Who owns Oruka Therapeutics (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-Q2 13F filings (latest filed 2026-09-22). 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
The tracked-fund tape on ORKA is one-sided between 2026-Q1 and 2026-Q2: 161 added or opened and 22 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 0.1% 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 2026-Q1 and 2026-Q2, across 248 tracked filers holding ORKA, 188 increased or opened the position and 76 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
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 2026-Q1 and 2026-Q2 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 51
- Capital World Investors$324M
- RA CAPITAL MANAGEMENT, L.P.$148M
- Jupiter Topco LLC$131M
- SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC$63M
- Pictet Asset Management Holding SA$59M
- MASSACHUSETTS FINANCIAL SERVICES CO /MA/$35M
Full exits 15
- MERCER GLOBAL ADVISORS INC /ADV$39M
- SR One Capital Management, LP$21M
- Ikarian Capital, LLC$12M
- Cable Car Capital, LP$10M
- Jones Hill Capital LP$7M
- Longaeva Partners L.P.$7M
Largest adds
- FMR LLC$499M
- BlackRock, Inc.$302M
- RTW INVESTMENTS, LP$198M
- Venrock Adviser, LLC$191M
- STATE STREET CORP$175M
- Fairmount Funds Management LLC$171M
Largest trims
- AMERICAN CENTURY COMPANIES INC$3M
- Atika Capital Management LLC$2M
- Voleon Capital Management LP$2M
- MORGAN STANLEY$1M
- Woodline Partners LP$1M
- Alyeska Investment Group, L.P.$717K
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| FMR LLC added | 9,057,645 | $862M | 12.7% | 2026-Q2 |
| BlackRock, Inc. added | 4,990,181 | $475M | 7.0% | 2026-Q2 |
| Venrock Adviser, LLC | 4,148,428 | $395M | 5.8% | 2026-Q2 |
| Fairmount Funds Management LLC | 3,705,262 | $353M | 5.2% | 2026-Q2 |
| Capital World Investors new | 3,401,639 | $324M | 4.8% | 2026-Q2 |
| RTW INVESTMENTS, LP added | 3,139,030 | $299M | 4.4% | 2026-Q2 |
| STATE STREET CORP added | 2,673,090 | $254M | 3.8% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 2,360,971 | $225M | 3.3% | 2026-Q2 |
| Paradigm Biocapital Advisors LP trimmed | 2,144,526 | $204M | 3.0% | 2026-Q2 |
| Deep Track Capital, LP trimmed | 1,926,000 | $183M | 2.7% | 2026-Q2 |
| Bellevue Group AG added | 1,657,190 | $158M | 2.3% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 1,621,451 | $154M | 2.3% | 2026-Q2 |
| Remedium Capital Partners, LLC trimmed | 1,565,661 | $149M | 2.2% | 2026-Q2 |
| RA CAPITAL MANAGEMENT, L.P. new | 1,554,597 | $148M | 2.2% | 2026-Q2 |
| VIKING GLOBAL INVESTORS LP trimmed | 1,503,478 | $143M | 2.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,429,954 | $136M | 2.0% | 2026-Q2 |
| Jupiter Topco LLC new | 1,375,844 | $131M | 1.9% | 2026-Q2 |
| PERCEPTIVE ADVISORS LLC trimmed | 1,345,063 | $128M | 1.9% | 2026-Q2 |
| Polar Capital Holdings Plc added | 1,228,609 | $117M | 1.7% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 1,119,011 | $106M | 1.6% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 1,079,015 | $103M | 1.5% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 838,603 | $80M | 1.2% | 2026-Q2 |
| Avidity Partners Management LP | 760,424 | $72M | 1.1% | 2026-Q2 |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC new | 658,301 | $63M | 0.9% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 655,027 | $61M | 0.9% | 2026-Q2 |
| Aberdeen Group plc added | 646,943 | $62M | 0.9% | 2026-Q2 |
| UBS Group AG added | 639,363 | $61M | 0.9% | 2026-Q2 |
| WESTFIELD CAPITAL MANAGEMENT CO LP added | 631,433 | $60M | 0.9% | 2026-Q2 |
| Pictet Asset Management Holding SA new | 619,076 | $59M | 0.9% | 2026-Q2 |
| Affinity Asset Advisors, LLC added | 590,000 | $56M | 0.8% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 582,409 | $55M | 0.8% | 2026-Q2 |
| Cormorant Asset Management, LP | 533,340 | $51M | 0.8% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 433,405 | $41M | 0.6% | 2026-Q2 |
| NORTHERN TRUST CORP added | 428,891 | $41M | 0.6% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC added | 401,149 | $38M | 0.6% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 365,630 | $35M | 0.5% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ new | 364,102 | $35M | 0.5% | 2026-Q2 |
| Synergy Asset Management, LLC trimmed | 356,301 | $34M | 0.5% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. added | 355,003 | $34M | 0.5% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 352,824 | $34M | 0.5% | 2026-Q2 |
| SILVERARC CAPITAL MANAGEMENT, LLC added | 352,802 | $34M | 0.5% | 2026-Q2 |
| Candriam S.C.A. trimmed | 352,716 | $34M | 0.5% | 2026-Q2 |
| Holocene Advisors, LP added | 305,951 | $29M | 0.4% | 2026-Q2 |
| JENNISON ASSOCIATES LLC added | 299,257 | $28M | 0.4% | 2026-Q2 |
| Woodline Partners LP trimmed | 285,247 | $27M | 0.4% | 2026-Q2 |
| BRAIDWELL LP added | 278,164 | $26M | 0.4% | 2026-Q2 |
| Siren, L.L.C. new | 250,000 | $24M | 0.4% | 2026-Q2 |
| Nuveen, LLC added | 249,267 | $24M | 0.4% | 2026-Q2 |
| EVENTIDE ASSET MANAGEMENT, LLC new | 240,000 | $23M | 0.3% | 2026-Q2 |
| Blackstone Inc. trimmed | 237,108 | $23M | 0.3% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. new | 219,039 | $21M | 0.3% | 2026-Q2 |
| SEB Asset Management AB new | 196,753 | $19M | 0.3% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 195,204 | $19M | 0.3% | 2026-Q2 |
| GREAT POINT PARTNERS LLC | 183,330 | $17M | 0.3% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 179,439 | $17M | 0.3% | 2026-Q2 |
| Sio Capital Management, LLC added | 177,118 | $17M | 0.2% | 2026-Q2 |
| PFM Health Sciences, LP trimmed | 158,825 | $15M | 0.2% | 2026-Q2 |
| First Turn Management, LLC new | 155,343 | $15M | 0.2% | 2026-Q2 |
| ExodusPoint Capital Management, LP added | 148,212 | $14M | 0.2% | 2026-Q2 |
| Bank of New York Mellon Corp added | 140,870 | $13M | 0.2% | 2026-Q2 |
| Invesco Ltd. added | 124,658 | $12M | 0.2% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 124,278 | $12M | 0.2% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 119,601 | $11M | 0.2% | 2026-Q2 |
| STEMPOINT CAPITAL LP new | 116,461 | $11M | 0.2% | 2026-Q2 |
| Parkman Healthcare Partners LLC new | 113,188 | $11M | 0.2% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 113,176 | $11M | 0.2% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 112,943 | $11M | 0.2% | 2026-Q2 |
| Apis Capital Advisors, LLC new | 112,000 | $11M | 0.2% | 2026-Q2 |
| SEVEN GRAND MANAGERS, LLC new | 110,000 | $10M | 0.2% | 2026-Q2 |
| KENNEDY CAPITAL MANAGEMENT LLC trimmed | 106,863 | $10M | 0.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 104,310 | $10M | 0.1% | 2026-Q2 |
| TD Asset Management Inc added | 102,944 | $10M | 0.1% | 2026-Q2 |
| Moody Aldrich Partners LLC trimmed | 101,411 | $10M | 0.1% | 2026-Q2 |
| Atika Capital Management LLC trimmed | 100,000 | $10M | 0.1% | 2026-Q2 |
| TORONTO DOMINION BANK added | 89,837 | $9M | 0.1% | 2026-Q2 |
| Alyeska Investment Group, L.P. trimmed | 87,744 | $8M | 0.1% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 85,895 | $8M | 0.1% | 2026-Q2 |
| Rhenman & Partners Asset Management AB new | 80,000 | $8M | 0.1% | 2026-Q2 |
| MORGAN STANLEY trimmed | 76,360 | $7M | 0.1% | 2026-Q2 |
| B Group, Inc. | 75,000 | $7M | 0.1% | 2026-Q2 |
| BARCLAYS PLC trimmed | 74,762 | $7M | 0.1% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC new | 72,734 | $7M | 0.1% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 68,421 | $7M | 0.1% | 2026-Q2 |
| Fisher Asset Management, LLC new | 67,874 | $6M | 0.1% | 2026-Q2 |
| Ensign Peak Advisors, Inc trimmed | 67,668 | $6M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 67,101 | $6M | 0.1% | 2026-Q2 |
| Secure Asset Management, LLC trimmed | 65,899 | $6M | 0.1% | 2026-Q2 |
| Swiss National Bank added | 63,000 | $6M | 0.1% | 2026-Q2 |
| ALPS ADVISORS INC added | 61,014 | $6M | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 60,784 | $6M | 0.1% | 2026-Q2 |
| Informed Momentum Co LLC trimmed | 59,014 | $6M | 0.1% | 2026-Q2 |
| Atle Fund Management AB new | 54,886 | $5M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 51,924 | $5M | 0.1% | 2026-Q2 |
| Granahan Investment Management, LLC new | 51,038 | $5M | 0.1% | 2026-Q2 |
| Ghisallo Capital Management LLC new | 50,000 | $5M | 0.1% | 2026-Q2 |
| Burkehill Global Management, LP new | 50,000 | $5M | 0.1% | 2026-Q2 |
| Trexquant Investment LP new | 49,616 | $5M | 0.1% | 2026-Q2 |
| Rafferty Asset Management, LLC added | 43,110 | $4M | 0.1% | 2026-Q2 |
| SECTORAL ASSET MANAGEMENT INC new | 41,987 | $4M | 0.1% | 2026-Q2 |
| HighVista Strategies LLC trimmed | 41,902 | $4M | 0.1% | 2026-Q2 |
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.