Who owns BIO (BIO)
Which tracked institutional funds hold BIO, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See BIO 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 BIO while 102 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
BIO’s largest tracked holder by dollar value, First Eagle Investment Management, LLC, sizes it at 1.2% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.2pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in BIO 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 390 tracked filers holding BIO, 203 increased or opened the position and 169 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 BIO 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 29
- VANGUARD CAPITAL MANAGEMENT LLC$232M
- VANGUARD PORTFOLIO MANAGEMENT LLC$231M
- Capital World Investors$125M
- NOMURA HOLDINGS INC$61M
- CIBC Bancorp USA Inc.$33M
- VANGUARD FIDUCIARY TRUST CO$32M
Full exits 28
- VANGUARD GROUP INC$529M
- Veritas Asset Management LLP$165M
- FULLER & THALER ASSET MANAGEMENT, INC.$79M
- WESTFIELD CAPITAL MANAGEMENT CO LP$50M
- JANE STREET GROUP, LLC$22M
- MOORE CAPITAL MANAGEMENT, LP$15M
Largest adds
- BARCLAYS PLC$70M
- Assenagon Asset Management S.A.$41M
- CITADEL ADVISORS LLC$39M
- UBS Group AG$33M
- MORGAN STANLEY$20M
- JONES FINANCIAL COMPANIES LLLP$19M
Largest trims
- BlackRock, Inc.$94M
- Boston Partners$73M
- First Eagle Investment Management, LLC$53M
- Capital Research Global Investors$42M
- SOUTHEASTERN ASSET MANAGEMENT INC/TN/$24M
- DIMENSIONAL FUND ADVISORS LP$23M
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 |
|---|---|---|---|---|
| First Eagle Investment Management, LLC added | 2,602,772 | $726M | 11.6% | 2026-Q1 |
| BlackRock, Inc. trimmed | 1,491,692 | $416M | 6.6% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 1,089,323 | $304M | 4.8% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 831,165 | $232M | 3.7% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 829,186 | $231M | 3.7% | 2026-Q1 |
| ARIEL INVESTMENTS, LLC added | 785,961 | $219M | 3.5% | 2026-Q1 |
| EARNEST PARTNERS LLC trimmed | 588,731 | $164M | 2.6% | 2026-Q1 |
| STATE STREET CORP trimmed | 559,570 | $156M | 2.5% | 2026-Q1 |
| Capital World Investors new | 450,000 | $125M | 2.0% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 444,957 | $124M | 2.0% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 426,038 | $119M | 1.9% | 2026-Q1 |
| First Pacific Advisors, LP added | 407,358 | $114M | 1.8% | 2026-Q1 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 396,150 | $110M | 1.8% | 2026-Q1 |
| Capital Research Global Investors trimmed | 385,579 | $107M | 1.7% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 364,682 | $102M | 1.6% | 2026-Q1 |
| UBS Group AG added | 354,365 | $99M | 1.6% | 2026-Q1 |
| SEI INVESTMENTS CO trimmed | 287,912 | $80M | 1.3% | 2026-Q1 |
| BARCLAYS PLC added | 278,835 | $78M | 1.2% | 2026-Q1 |
| MORGAN STANLEY added | 273,931 | $76M | 1.2% | 2026-Q1 |
| PARNASSUS INVESTMENTS, LLC added | 254,305 | $71M | 1.1% | 2026-Q1 |
| DEERFIELD MANAGEMENT COMPANY, L.P. | 226,070 | $63M | 1.0% | 2026-Q1 |
| NORTHERN TRUST CORP added | 218,497 | $61M | 1.0% | 2026-Q1 |
| NOMURA HOLDINGS INC added | 217,342 | $61M | 1.0% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 196,558 | $55M | 0.9% | 2026-Q1 |
| Mawer Investment Management Ltd. trimmed | 188,784 | $53M | 0.8% | 2026-Q1 |
| THOMPSON SIEGEL & WALMSLEY LLC trimmed | 176,465 | $49M | 0.8% | 2026-Q1 |
| GW&K Investment Management, LLC trimmed | 174,708 | $49M | 0.8% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 170,354 | $47M | 0.8% | 2026-Q1 |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ trimmed | 162,804 | $45M | 0.7% | 2026-Q1 |
| Gotham Asset Management, LLC added | 152,384 | $42M | 0.7% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 148,669 | $41M | 0.7% | 2026-Q1 |
| Assenagon Asset Management S.A. added | 147,834 | $41M | 0.7% | 2026-Q1 |
| Freestone Grove Partners LP added | 147,605 | $41M | 0.7% | 2026-Q1 |
| NORGES BANK added | 156,714 | $38M | 0.6% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 126,856 | $35M | 0.6% | 2026-Q1 |
| MANGROVE PARTNERS IM, LLC | 126,853 | $35M | 0.6% | 2026-Q1 |
| CIBC Bancorp USA Inc. new | 120,120 | $33M | 0.5% | 2026-Q1 |
| Fisher Asset Management, LLC trimmed | 118,683 | $33M | 0.5% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 113,639 | $32M | 0.5% | 2026-Q1 |
| Allianz Asset Management GmbH added | 110,241 | $31M | 0.5% | 2026-Q1 |
| FEDERATED HERMES, INC. trimmed | 109,895 | $31M | 0.5% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 105,333 | $29M | 0.5% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC trimmed | 102,800 | $29M | 0.5% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 99,720 | $28M | 0.4% | 2026-Q1 |
| Tikvah Management LLC trimmed | 97,834 | $27M | 0.4% | 2026-Q1 |
| Hound Partners, LLC added | 97,724 | $27M | 0.4% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 99,391 | $27M | 0.4% | 2026-Q1 |
| Boston Trust Walden Corp added | 93,495 | $26M | 0.4% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 94,429 | $26M | 0.4% | 2026-Q1 |
| JNE Partners LLP | 92,100 | $26M | 0.4% | 2026-Q1 |
| NATIONAL BANK OF CANADA /FI/ added | 90,000 | $25M | 0.4% | 2026-Q1 |
| ING GROEP NV added | 90,000 | $25M | 0.4% | 2026-Q1 |
| Allspring Global Investments Holdings, LLC trimmed | 85,965 | $24M | 0.4% | 2026-Q1 |
| QVIDTVM Management LLC added | 83,732 | $23M | 0.4% | 2026-Q1 |
| NATIXIS ADVISORS, LLC added | 75,047 | $21M | 0.3% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 74,281 | $21M | 0.3% | 2026-Q1 |
| Hosking Partners LLP added | 69,009 | $19M | 0.3% | 2026-Q1 |
| JONES FINANCIAL COMPANIES LLLP added | 71,976 | $19M | 0.3% | 2026-Q1 |
| Man Group plc added | 67,436 | $19M | 0.3% | 2026-Q1 |
| SG Americas Securities, LLC added | 66,985 | $19M | 0.3% | 2026-Q1 |
| EXCHANGE TRADED CONCEPTS, LLC added | 58,530 | $16M | 0.3% | 2026-Q1 |
| Marathon Asset Management Ltd added | 53,661 | $15M | 0.2% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 53,040 | $15M | 0.2% | 2026-Q1 |
| Select Equity Group, L.P. trimmed | 48,436 | $14M | 0.2% | 2026-Q1 |
| HRT FINANCIAL LP added | 46,556 | $13M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 46,037 | $13M | 0.2% | 2026-Q1 |
| Arnhold LLC added | 42,902 | $12M | 0.2% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 40,614 | $11M | 0.2% | 2026-Q1 |
| ASSETMARK, INC added | 38,989 | $11M | 0.2% | 2026-Q1 |
| Amundi added | 38,778 | $11M | 0.2% | 2026-Q1 |
| Swiss National Bank | 36,880 | $10M | 0.2% | 2026-Q1 |
| Invesco Ltd. added | 36,835 | $10M | 0.2% | 2026-Q1 |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY | 36,444 | $10M | 0.2% | 2026-Q1 |
| Legal & General Group Plc trimmed | 36,228 | $10M | 0.2% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 35,894 | $10M | 0.2% | 2026-Q1 |
| California Public Employees Retirement System added | 35,348 | $10M | 0.2% | 2026-Q1 |
| Quantinno Capital Management LP trimmed | 33,650 | $9M | 0.1% | 2026-Q1 |
| MARSHALL WACE, LLP added | 33,217 | $9M | 0.1% | 2026-Q1 |
| Almitas Capital LLC new | 30,254 | $8M | 0.1% | 2026-Q1 |
| Nuveen, LLC added | 29,417 | $8M | 0.1% | 2026-Q1 |
| GABELLI FUNDS LLC trimmed | 28,400 | $8M | 0.1% | 2026-Q1 |
| GAMCO INVESTORS, INC. ET AL | 26,750 | $7M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 24,487 | $7M | 0.1% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 26,326 | $7M | 0.1% | 2026-Q1 |
| WINSLOW ASSET MANAGEMENT INC trimmed | 24,169 | $7M | 0.1% | 2026-Q1 |
| SECTOR GAMMA AS | 23,750 | $7M | 0.1% | 2026-Q1 |
| Retirement Systems of Alabama added | 22,289 | $6M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 21,932 | $6M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 1,746,312 | $529M | 8.4% | 2025-Q4 stale |
| Veritas Asset Management LLP trimmed | 543,335 | $165M | 2.6% | 2025-Q4 stale |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 259,577 | $79M | 1.3% | 2025-Q4 stale |
| WESTFIELD CAPITAL MANAGEMENT CO LP added | 165,107 | $50M | 0.8% | 2025-Q4 stale |
| Ilex Capital Partners (UK) LLP trimmed | 100,558 | $28M | 0.4% | 2025-Q3 stale |
| Artisan Partners Limited Partnership trimmed | 86,371 | $24M | 0.4% | 2025-Q3 stale |
| SCOPIA CAPITAL MANAGEMENT LP new | 94,737 | $23M | 0.4% | 2025-Q2 stale |
| JANE STREET GROUP, LLC added | 73,967 | $22M | 0.4% | 2025-Q4 stale |
| MOORE CAPITAL MANAGEMENT, LP trimmed | 50,000 | $15M | 0.2% | 2025-Q4 stale |
| Campbell & CO Investment Adviser LLC added | 31,478 | $10M | 0.2% | 2025-Q4 stale |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 35,519 | $9M | 0.1% | 2025-Q1 stale |
| AYAL Capital Advisors Ltd added | 20,000 | $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.