Who owns OLMA (OLMA)
Which tracked institutional funds hold OLMA, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See OLMA 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
47 tracked funds added or opened OLMA while 99 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
OLMA’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 OLMA more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in OLMA 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 197 tracked filers holding OLMA, 120 increased or opened the position and 102 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 OLMA 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 24
- VANGUARD CAPITAL MANAGEMENT LLC$46M
- Duquesne Family Office LLC$15M
- VANGUARD PORTFOLIO MANAGEMENT LLC$9M
- VANGUARD FIDUCIARY TRUST CO$5M
- SEB Asset Management AB$5M
- Qube Research & Technologies Ltd$5M
Full exits 29
- VANGUARD GROUP INC$81M
- SAMLYN CAPITAL, LLC$27M
- EVENTIDE ASSET MANAGEMENT, LLC$14M
- Holocene Advisors, LP$13M
- MARSHALL WACE, LLP$9M
- Skandinaviska Enskilda Banken AB (publ)$7M
Largest adds
- FMR LLC$29M
- STATE STREET CORP$12M
- TWO SIGMA INVESTMENTS, LP$8M
- Jump Financial, LLC$4M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$4M
- Trexquant Investment LP$4M
Largest trims
- Bain Capital Life Sciences Investors, LLC$101M
- Paradigm Biocapital Advisors LP$69M
- JANUS HENDERSON GROUP PLC$62M
- BlackRock, Inc.$55M
- BVF INC/IL$53M
- FRANKLIN RESOURCES INC$44M
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 |
|---|---|---|---|---|
| FMR LLC added | 10,386,776 | $155M | 9.1% | 2026-Q1 |
| Paradigm Biocapital Advisors LP added | 8,020,576 | $120M | 7.0% | 2026-Q1 |
| Bain Capital Life Sciences Investors, LLC trimmed | 7,473,238 | $111M | 6.5% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC added | 7,108,488 | $106M | 6.2% | 2026-Q1 |
| BlackRock, Inc. added | 5,652,135 | $84M | 4.9% | 2026-Q1 |
| BVF INC/IL | 5,295,893 | $79M | 4.6% | 2026-Q1 |
| Siren, L.L.C. added | 4,756,949 | $71M | 4.1% | 2026-Q1 |
| STATE STREET CORP added | 3,937,831 | $59M | 3.4% | 2026-Q1 |
| Cormorant Asset Management, LP added | 3,900,000 | $58M | 3.4% | 2026-Q1 |
| Logos Global Management LP | 3,208,875 | $48M | 2.8% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 3,083,517 | $46M | 2.7% | 2026-Q1 |
| RA CAPITAL MANAGEMENT, L.P. | 2,600,000 | $39M | 2.3% | 2026-Q1 |
| JENNISON ASSOCIATES LLC added | 1,822,123 | $27M | 1.6% | 2026-Q1 |
| Polar Capital Holdings Plc added | 1,602,970 | $24M | 1.4% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,544,417 | $23M | 1.3% | 2026-Q1 |
| Defilade Capital Management, L.P. added | 1,504,536 | $22M | 1.3% | 2026-Q1 |
| Woodline Partners LP added | 1,482,030 | $22M | 1.3% | 2026-Q1 |
| LIGHTSPEED MANAGEMENT COMPANY, L.L.C. trimmed | 1,355,299 | $20M | 1.2% | 2026-Q1 |
| FRANKLIN RESOURCES INC trimmed | 1,218,957 | $18M | 1.1% | 2026-Q1 |
| MORGAN STANLEY added | 1,215,690 | $18M | 1.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 1,182,836 | $18M | 1.0% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 1,169,421 | $17M | 1.0% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 1,082,434 | $16M | 0.9% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 1,045,589 | $16M | 0.9% | 2026-Q1 |
| Duquesne Family Office LLC new | 986,827 | $15M | 0.9% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 905,332 | $13M | 0.8% | 2026-Q1 |
| KINGDON CAPITAL MANAGEMENT, L.L.C. trimmed | 855,000 | $13M | 0.7% | 2026-Q1 |
| First Turn Management, LLC added | 768,662 | $11M | 0.7% | 2026-Q1 |
| Candriam S.C.A. added | 759,513 | $11M | 0.7% | 2026-Q1 |
| Squarepoint Ops LLC added | 738,552 | $11M | 0.6% | 2026-Q1 |
| Vivo Capital, LLC | 671,843 | $10M | 0.6% | 2026-Q1 |
| Ikarian Capital, LLC trimmed | 598,281 | $9M | 0.5% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP added | 597,722 | $9M | 0.5% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 593,031 | $9M | 0.5% | 2026-Q1 |
| NORTHERN TRUST CORP added | 569,956 | $8M | 0.5% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 508,706 | $8M | 0.4% | 2026-Q1 |
| Hennion & Walsh Asset Management, Inc. added | 481,485 | $7M | 0.4% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 466,546 | $7M | 0.4% | 2026-Q1 |
| Jump Financial, LLC added | 452,966 | $7M | 0.4% | 2026-Q1 |
| Vestal Point Capital, LP trimmed | 428,551 | $6M | 0.4% | 2026-Q1 |
| UBS Group AG added | 385,061 | $6M | 0.3% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 358,310 | $5M | 0.3% | 2026-Q1 |
| SEB Asset Management AB new | 339,461 | $5M | 0.3% | 2026-Q1 |
| Trexquant Investment LP added | 325,173 | $5M | 0.3% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 312,812 | $5M | 0.3% | 2026-Q1 |
| Fisher Asset Management, LLC new | 299,756 | $4M | 0.3% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 285,882 | $4M | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 278,990 | $4M | 0.2% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. added | 275,000 | $4M | 0.2% | 2026-Q1 |
| Birchview Capital, LP trimmed | 219,000 | $3M | 0.2% | 2026-Q1 |
| Pictet Asset Management Holding SA trimmed | 217,023 | $3M | 0.2% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 203,959 | $3M | 0.2% | 2026-Q1 |
| Bank of New York Mellon Corp added | 193,483 | $3M | 0.2% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 182,935 | $3M | 0.2% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC trimmed | 174,603 | $3M | 0.2% | 2026-Q1 |
| Rock Springs Capital Management LP added | 170,378 | $3M | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 161,396 | $2M | 0.1% | 2026-Q1 |
| Hudson Bay Capital Management LP added | 154,770 | $2M | 0.1% | 2026-Q1 |
| Integral Health Asset Management, LLC new | 150,000 | $2M | 0.1% | 2026-Q1 |
| Pier Capital, LLC trimmed | 136,108 | $2M | 0.1% | 2026-Q1 |
| Rafferty Asset Management, LLC added | 131,520 | $2M | 0.1% | 2026-Q1 |
| Invesco Ltd. trimmed | 130,933 | $2M | 0.1% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 142,762 | $2M | 0.1% | 2026-Q1 |
| Burkehill Global Management, LP | 125,000 | $2M | 0.1% | 2026-Q1 |
| XTX Topco Ltd added | 123,218 | $2M | 0.1% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC added | 121,494 | $2M | 0.1% | 2026-Q1 |
| HighVista Strategies LLC trimmed | 117,601 | $2M | 0.1% | 2026-Q1 |
| FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. added | 116,812 | $2M | 0.1% | 2026-Q1 |
| Susquehanna Portfolio Strategies, LLC trimmed | 113,842 | $2M | 0.1% | 2026-Q1 |
| Aquatic Capital Management LLC added | 111,186 | $2M | 0.1% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC new | 110,150 | $2M | 0.1% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 109,582 | $2M | 0.1% | 2026-Q1 |
| TD Asset Management Inc trimmed | 106,214 | $2M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 57,840 | $1M | 0.1% | 2026-Q1 |
| Ensign Peak Advisors, Inc added | 96,782 | $1M | 0.1% | 2026-Q1 |
| Quantinno Capital Management LP added | 95,336 | $1M | 0.1% | 2026-Q1 |
| Y-Intercept (Hong Kong) Ltd added | 90,375 | $1M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 3,252,519 | $81M | 4.8% | 2025-Q4 stale |
| Deep Track Capital, LP added | 3,470,172 | $34M | 2.0% | 2025-Q3 stale |
| SAMLYN CAPITAL, LLC new | 1,069,543 | $27M | 1.6% | 2025-Q4 stale |
| EVENTIDE ASSET MANAGEMENT, LLC new | 569,000 | $14M | 0.8% | 2025-Q4 stale |
| Holocene Advisors, LP new | 506,001 | $13M | 0.7% | 2025-Q4 stale |
| MPM BIOIMPACT LLC trimmed | 2,378,762 | $10M | 0.6% | 2025-Q2 stale |
| MARSHALL WACE, LLP added | 360,394 | $9M | 0.5% | 2025-Q4 stale |
| Skandinaviska Enskilda Banken AB (publ) new | 281,687 | $7M | 0.4% | 2025-Q4 stale |
| Catalio Capital Management, LP new | 267,058 | $7M | 0.4% | 2025-Q4 stale |
| SILVERARC CAPITAL MANAGEMENT, LLC trimmed | 206,280 | $5M | 0.3% | 2025-Q4 stale |
| PERCEPTIVE ADVISORS LLC trimmed | 165,713 | $4M | 0.2% | 2025-Q4 stale |
| ExodusPoint Capital Management, LP added | 150,670 | $4M | 0.2% | 2025-Q4 stale |
| Schonfeld Strategic Advisors LLC added | 113,978 | $3M | 0.2% | 2025-Q4 stale |
| Brevan Howard Capital Management LP added | 107,950 | $3M | 0.2% | 2025-Q4 stale |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 618,184 | $3M | 0.2% | 2025-Q2 stale |
| Affinity Asset Advisors, LLC | 250,000 | $2M | 0.1% | 2025-Q3 stale |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | 94,883 | $2M | 0.1% | 2025-Q4 stale |
| ADAR1 Capital Management, LLC added | 81,399 | $2M | 0.1% | 2025-Q4 stale |
| Soleus Capital Management, L.P. trimmed | 69,874 | $2M | 0.1% | 2025-Q4 stale |
| SG Americas Securities, LLC added | 69,382 | $2M | 0.1% | 2025-Q4 stale |
| Harvest Investment Services, LLC new | 68,723 | $2M | 0.1% | 2025-Q4 stale |
| Nicholas Investment Partners, LP new | 64,757 | $2M | 0.1% | 2025-Q4 stale |
| FRED ALGER MANAGEMENT, LLC added | 64,484 | $2M | 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.