Who owns XBI (XBI)
Which tracked institutional funds hold XBI, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See XBI 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
192 tracked funds added or opened XBI while 127 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
XBI’s largest tracked holder by dollar value, BNP PARIBAS FINANCIAL MARKETS, sizes it at 1.8% of its own reported 13F book, while the median holder sizes it at 0.4% of theirs — a 1.4pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in XBI 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 814 tracked filers holding XBI, 359 increased or opened the position and 350 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 XBI 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 40
- Quadrature Capital Ltd$62M
- Migdal Insurance & Financial Holdings Ltd.$57M
- PSP Research LLC$36M
- Annex Advisory Services, LLC$32M
- E Fund Management Co., Ltd.$16M
- Quantitative Investment Management, LLC$14M
Full exits 53
- Avoro Capital Advisors LLC$256M
- OMERS ADMINISTRATION Corp$145M
- Jain Global LLC$30M
- Marks Wealth, LLC$29M
- MOORE CAPITAL MANAGEMENT, LP$27M
- Zweig-DiMenna Associates LLC$13M
Largest adds
- BNP PARIBAS FINANCIAL MARKETS$680M
- JPMORGAN CHASE & CO$342M
- BANK OF AMERICA CORP /DE/$292M
- CITADEL ADVISORS LLC$255M
- MORGAN STANLEY$174M
- BARCLAYS PLC$132M
Largest trims
- GOLDMAN SACHS GROUP INC$674M
- HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND$291M
- TWO SIGMA INVESTMENTS, LP$171M
- CITIGROUP INC$165M
- WELLS FARGO & COMPANY/MN$84M
- SUMITOMO MITSUI FINANCIAL GROUP, INC.$63M
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 |
|---|---|---|---|---|
| BNP PARIBAS FINANCIAL MARKETS added | 21,155,872 | $2.7B | 15.8% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 14,518,027 | $1.9B | 10.9% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 13,719,344 | $1.8B | 10.3% | 2026-Q1 |
| MORGAN STANLEY added | 12,331,553 | $1.6B | 9.2% | 2026-Q1 |
| CITIGROUP INC trimmed | 10,663,404 | $1.4B | 8.0% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed | 9,745,500 | $1.2B | 7.3% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 6,231,375 | $740M | 4.3% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 4,529,600 | $579M | 3.4% | 2026-Q1 |
| UBS Group AG added | 3,546,650 | $453M | 2.7% | 2026-Q1 |
| BARCLAYS PLC added | 2,834,160 | $362M | 2.1% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 2,746,209 | $351M | 2.1% | 2026-Q1 |
| Jefferies Financial Group Inc. added | 2,314,720 | $296M | 1.7% | 2026-Q1 |
| BESSEMER GROUP INC trimmed | 1,805,630 | $231M | 1.4% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD | 1,758,000 | $225M | 1.3% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 1,367,792 | $175M | 1.0% | 2026-Q1 |
| BANK OF MONTREAL /CAN/ added | 834,630 | $107M | 0.6% | 2026-Q1 |
| MEITAV INVESTMENT HOUSE LTD trimmed | 809,579 | $103M | 0.6% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 801,995 | $102M | 0.6% | 2026-Q1 |
| LPL Financial LLC trimmed | 792,546 | $101M | 0.6% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 725,538 | $93M | 0.5% | 2026-Q1 |
| Employees Retirement System of Texas trimmed | 688,272 | $88M | 0.5% | 2026-Q1 |
| Greenhouse Funds LLLP trimmed | 650,949 | $83M | 0.5% | 2026-Q1 |
| ASSETMARK, INC trimmed | 623,015 | $80M | 0.5% | 2026-Q1 |
| Main Street Research LLC added | 567,479 | $72M | 0.4% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 510,065 | $65M | 0.4% | 2026-Q1 |
| NATIXIS trimmed | 488,804 | $62M | 0.4% | 2026-Q1 |
| Clal Insurance Enterprises Holdings Ltd trimmed | 484,500 | $62M | 0.4% | 2026-Q1 |
| Quadrature Capital Ltd added | 483,532 | $62M | 0.4% | 2026-Q1 |
| Migdal Insurance & Financial Holdings Ltd. trimmed | 450,000 | $57M | 0.3% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 433,132 | $55M | 0.3% | 2026-Q1 |
| Clearbridge Investments, LLC added | 417,019 | $53M | 0.3% | 2026-Q1 |
| Investure, LLC | 412,250 | $53M | 0.3% | 2026-Q1 |
| STRS OHIO added | 410,500 | $52M | 0.3% | 2026-Q1 |
| SG Americas Securities, LLC added | 391,243 | $50M | 0.3% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 373,200 | $48M | 0.3% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 341,169 | $44M | 0.3% | 2026-Q1 |
| DAFNA Capital Management LLC trimmed | 318,505 | $41M | 0.2% | 2026-Q1 |
| STIFEL FINANCIAL CORP trimmed | 290,957 | $37M | 0.2% | 2026-Q1 |
| Walleye Trading LLC added | 287,721 | $37M | 0.2% | 2026-Q1 |
| PSP Research LLC new | 284,900 | $36M | 0.2% | 2026-Q1 |
| Aptus Capital Advisors, LLC added | 270,719 | $35M | 0.2% | 2026-Q1 |
| GENDELL JEFFREY L | 262,278 | $34M | 0.2% | 2026-Q1 |
| WHITTIER TRUST CO added | 257,702 | $33M | 0.2% | 2026-Q1 |
| Annex Advisory Services, LLC new | 247,103 | $32M | 0.2% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC trimmed | 238,754 | $30M | 0.2% | 2026-Q1 |
| Rockefeller Capital Management L.P. trimmed | 235,832 | $30M | 0.2% | 2026-Q1 |
| Williams Jones Wealth Management, LLC. added | 199,576 | $25M | 0.1% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 190,717 | $24M | 0.1% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 187,867 | $24M | 0.1% | 2026-Q1 |
| GenTrust, LLC | 175,663 | $22M | 0.1% | 2026-Q1 |
| OSBORNE PARTNERS CAPITAL MANAGEMENT, LLC trimmed | 170,839 | $22M | 0.1% | 2026-Q1 |
| Royal Fund Management, LLC added | 162,850 | $21M | 0.1% | 2026-Q1 |
| Cetera Investment Advisers trimmed | 162,254 | $21M | 0.1% | 2026-Q1 |
| WEATHERLY ASSET MANAGEMENT L. P. trimmed | 158,095 | $20M | 0.1% | 2026-Q1 |
| Sivik Global Healthcare LLC trimmed | 150,000 | $19M | 0.1% | 2026-Q1 |
| WS MANAGEMENT LLLP added | 150,000 | $19M | 0.1% | 2026-Q1 |
| BlackRock, Inc. trimmed | 148,817 | $19M | 0.1% | 2026-Q1 |
| Curi Capital, LLC added | 143,846 | $18M | 0.1% | 2026-Q1 |
| United Capital Management of KS, Inc. trimmed | 141,504 | $18M | 0.1% | 2026-Q1 |
| Nan Shan Life Insurance Co., Ltd. added | 138,611 | $18M | 0.1% | 2026-Q1 |
| L. Roy Papp & Associates, LLP trimmed | 133,599 | $17M | 0.1% | 2026-Q1 |
| Madrona Financial Services, LLC added | 132,038 | $17M | 0.1% | 2026-Q1 |
| Mivtachim The Workers Social Insurance Fund Ltd. (Under Special Management) added | 130,306 | $17M | 0.1% | 2026-Q1 |
| OSAIC HOLDINGS, INC. added | 129,997 | $17M | 0.1% | 2026-Q1 |
| E Fund Management Co., Ltd. new | 128,500 | $16M | 0.1% | 2026-Q1 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO added | 127,910 | $16M | 0.1% | 2026-Q1 |
| WHITTIER TRUST CO OF NEVADA INC added | 126,463 | $16M | 0.1% | 2026-Q1 |
| Janney Montgomery Scott LLC added | 120,550 | $15M | 0.1% | 2026-Q1 |
| Quantitative Investment Management, LLC added | 111,719 | $14M | 0.1% | 2026-Q1 |
| Edge Wealth Management LLC added | 111,135 | $14M | 0.1% | 2026-Q1 |
| Riggs Asset Managment Co. Inc. added | 107,791 | $14M | 0.1% | 2026-Q1 |
| JBF Capital, Inc. | 105,000 | $13M | 0.1% | 2026-Q1 |
| BANCO BILBAO VIZCAYA ARGENTARIA, S.A. added | 106,595 | $13M | 0.1% | 2026-Q1 |
| Yelin Lapidot Holdings Management Ltd. | 104,532 | $13M | 0.1% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 102,353 | $13M | 0.1% | 2026-Q1 |
| MIRAE ASSET SECURITIES (USA) INC. | 100,000 | $13M | 0.1% | 2026-Q1 |
| Lalia Capital, LLC | 100,000 | $13M | 0.1% | 2026-Q1 |
| OXFORD ASSET MANAGEMENT LLP added | 97,266 | $12M | 0.1% | 2026-Q1 |
| Focus Partners Wealth added | 96,502 | $12M | 0.1% | 2026-Q1 |
| Thrivent Financial for Lutherans trimmed | 95,982 | $12M | 0.1% | 2026-Q1 |
| S&CO INC trimmed | 94,280 | $12M | 0.1% | 2026-Q1 |
| Lake Hills Wealth Management, LLC added | 91,973 | $12M | 0.1% | 2026-Q1 |
| INVESTMENT HOUSE LLC trimmed | 91,420 | $12M | 0.1% | 2026-Q1 |
| Parkside Investments, LLC added | 90,577 | $12M | 0.1% | 2026-Q1 |
| Ilmarinen Mutual Pension Insurance Co | 90,329 | $12M | 0.1% | 2026-Q1 |
| GROUP ONE TRADING LLC added | 90,331 | $12M | 0.1% | 2026-Q1 |
| Avoro Capital Advisors LLC trimmed | 2,100,000 | $256M | 1.5% | 2025-Q4 stale |
| OMERS ADMINISTRATION Corp added | 1,190,707 | $145M | 0.9% | 2025-Q4 stale |
| Harel Insurance Investments & Financial Services Ltd. trimmed | 600,000 | $49M | 0.3% | 2025-Q1 stale |
| Jain Global LLC added | 249,894 | $30M | 0.2% | 2025-Q4 stale |
| Marks Wealth, LLC new | 236,668 | $29M | 0.2% | 2025-Q4 stale |
| MOORE CAPITAL MANAGEMENT, LP trimmed | 225,000 | $27M | 0.2% | 2025-Q4 stale |
| J.Safra Asset Management Corp added | 310,817 | $25M | 0.1% | 2025-Q1 stale |
| ExodusPoint Capital Management, LP added | 284,457 | $23M | 0.1% | 2025-Q1 stale |
| SIMPLEX TRADING, LLC trimmed | 241,039 | $20M | 0.1% | 2025-Q1 stale |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 227,917 | $18M | 0.1% | 2025-Q1 stale |
| Vanderbilt University added | 158,786 | $16M | 0.1% | 2025-Q3 stale |
| Zweig-DiMenna Associates LLC new | 110,700 | $13M | 0.1% | 2025-Q4 stale |
| Nuveen, LLC new | 149,658 | $12M | 0.1% | 2025-Q1 stale |
| KEYSTONE INVESTORS PTE LTD added | 98,600 | $12M | 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.