Who owns XENE (XENE)
Which tracked institutional funds hold XENE, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See XENE 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
The tracked-fund tape on XENE is one-sided between 2025-Q4 and 2026-Q1: 165 added or opened and 39 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
XENE’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 0.1pp gap the other way — the median holder sizes XENE more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in XENE 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 292 tracked filers holding XENE, 206 increased or opened the position and 98 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 XENE 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 46
- Alyeska Investment Group, L.P.$76M
- VANGUARD PORTFOLIO MANAGEMENT LLC$32M
- Octagon Capital Advisors LP$28M
- NOVO HOLDINGS A/S$28M
- Logos Global Management LP$26M
- Schonfeld Strategic Advisors LLC$19M
Full exits 18
- VANGUARD GROUP INC$30M
- DIMENSIONAL FUND ADVISORS LP$20M
- Deep Track Capital, LP$16M
- TWO SIGMA ADVISERS, LP$12M
- Iron Triangle Partners LP$10M
- PERCEPTIVE ADVISORS LLC$9M
Largest adds
- FMR LLC$229M
- Polar Capital Holdings Plc$146M
- CITADEL ADVISORS LLC$95M
- Avoro Capital Advisors LLC$93M
- DEERFIELD MANAGEMENT COMPANY, L.P.$70M
- WELLINGTON MANAGEMENT GROUP LLP$66M
Largest trims
- Commodore Capital LP$33M
- BlackRock, Inc.$22M
- MILLENNIUM MANAGEMENT LLC$17M
- BARCLAYS PLC$13M
- ALLIANCEBERNSTEIN L.P.$9M
- STEMPOINT CAPITAL LP$7M
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 | 10,818,491 | $629M | 11.3% | 2026-Q1 |
| Avoro Capital Advisors LLC added | 5,777,777 | $336M | 6.0% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP added | 4,808,134 | $280M | 5.0% | 2026-Q1 |
| Driehaus Capital Management LLC trimmed | 4,491,653 | $261M | 4.7% | 2026-Q1 |
| Polar Capital Holdings Plc added | 4,405,312 | $256M | 4.6% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC added | 4,175,982 | $243M | 4.4% | 2026-Q1 |
| BlackRock, Inc. trimmed | 3,558,714 | $207M | 3.7% | 2026-Q1 |
| Capital International Investors trimmed | 2,674,727 | $156M | 2.8% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 2,652,990 | $154M | 2.8% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 1,923,610 | $107M | 1.9% | 2026-Q1 |
| STATE STREET CORP added | 1,720,533 | $100M | 1.8% | 2026-Q1 |
| Affinity Asset Advisors, LLC added | 1,675,000 | $97M | 1.8% | 2026-Q1 |
| DEERFIELD MANAGEMENT COMPANY, L.P. added | 1,615,696 | $94M | 1.7% | 2026-Q1 |
| Holocene Advisors, LP added | 1,518,686 | $88M | 1.6% | 2026-Q1 |
| WESTFIELD CAPITAL MANAGEMENT CO LP added | 1,401,483 | $81M | 1.5% | 2026-Q1 |
| Caligan Partners LP added | 1,393,027 | $81M | 1.5% | 2026-Q1 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 1,342,028 | $78M | 1.4% | 2026-Q1 |
| BRAIDWELL LP trimmed | 1,338,452 | $78M | 1.4% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 1,329,591 | $77M | 1.4% | 2026-Q1 |
| JENNISON ASSOCIATES LLC added | 1,318,814 | $77M | 1.4% | 2026-Q1 |
| Siren, L.L.C. added | 1,318,564 | $77M | 1.4% | 2026-Q1 |
| Alyeska Investment Group, L.P. added | 1,299,469 | $76M | 1.4% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 1,280,577 | $74M | 1.3% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,092,932 | $64M | 1.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 1,403,297 | $63M | 1.1% | 2026-Q1 |
| ORBIMED ADVISORS LLC added | 1,059,971 | $62M | 1.1% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 972,237 | $57M | 1.0% | 2026-Q1 |
| T. Rowe Price Investment Management, Inc. added | 951,955 | $55M | 1.0% | 2026-Q1 |
| Capital World Investors added | 840,072 | $49M | 0.9% | 2026-Q1 |
| Commodore Capital LP trimmed | 825,000 | $48M | 0.9% | 2026-Q1 |
| First Turn Management, LLC trimmed | 786,844 | $46M | 0.8% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 769,875 | $45M | 0.8% | 2026-Q1 |
| Rock Springs Capital Management LP trimmed | 763,020 | $44M | 0.8% | 2026-Q1 |
| Fiera Capital Corp added | 709,529 | $41M | 0.7% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC trimmed | 679,314 | $40M | 0.7% | 2026-Q1 |
| Pictet Asset Management Holding SA added | 679,709 | $39M | 0.7% | 2026-Q1 |
| Vestal Point Capital, LP added | 639,900 | $37M | 0.7% | 2026-Q1 |
| Aberdeen Group plc trimmed | 609,929 | $35M | 0.6% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 606,085 | $35M | 0.6% | 2026-Q1 |
| MPM BIOIMPACT LLC added | 588,706 | $34M | 0.6% | 2026-Q1 |
| LOOMIS SAYLES & CO L P trimmed | 564,897 | $33M | 0.6% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 543,062 | $32M | 0.6% | 2026-Q1 |
| NORTHERN TRUST CORP added | 527,783 | $31M | 0.6% | 2026-Q1 |
| Parkman Healthcare Partners LLC added | 497,035 | $29M | 0.5% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 495,591 | $29M | 0.5% | 2026-Q1 |
| Octagon Capital Advisors LP new | 490,000 | $28M | 0.5% | 2026-Q1 |
| NOVO HOLDINGS A/S new | 485,438 | $28M | 0.5% | 2026-Q1 |
| Candriam S.C.A. added | 476,494 | $28M | 0.5% | 2026-Q1 |
| MORGAN STANLEY added | 473,759 | $28M | 0.5% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 470,000 | $27M | 0.5% | 2026-Q1 |
| Logos Global Management LP trimmed | 450,000 | $26M | 0.5% | 2026-Q1 |
| Trails Edge Capital Partners, LP trimmed | 440,000 | $26M | 0.5% | 2026-Q1 |
| Bank of New York Mellon Corp added | 396,138 | $23M | 0.4% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 375,166 | $22M | 0.4% | 2026-Q1 |
| BAKER BROS. ADVISORS LP | 370,208 | $22M | 0.4% | 2026-Q1 |
| TimesSquare Capital Management, LLC trimmed | 359,293 | $21M | 0.4% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC added | 324,722 | $19M | 0.3% | 2026-Q1 |
| Sofinnova Investments, Inc. added | 305,216 | $18M | 0.3% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 300,500 | $17M | 0.3% | 2026-Q1 |
| Soleus Capital Management, L.P. added | 292,000 | $17M | 0.3% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC added | 270,412 | $16M | 0.3% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 265,267 | $15M | 0.3% | 2026-Q1 |
| ALGERT GLOBAL LLC added | 264,200 | $15M | 0.3% | 2026-Q1 |
| Redmile Group, LLC added | 262,674 | $15M | 0.3% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD added | 254,483 | $15M | 0.3% | 2026-Q1 |
| DAFNA Capital Management LLC trimmed | 250,772 | $15M | 0.3% | 2026-Q1 |
| Nuveen, LLC added | 250,036 | $15M | 0.3% | 2026-Q1 |
| NAN FUNG TRINITY (HK) LTD added | 247,765 | $14M | 0.3% | 2026-Q1 |
| Nicholas Investment Partners, LP added | 247,101 | $14M | 0.3% | 2026-Q1 |
| Allspring Global Investments Holdings, LLC new | 246,306 | $14M | 0.3% | 2026-Q1 |
| Duquesne Family Office LLC new | 238,600 | $14M | 0.2% | 2026-Q1 |
| BARCLAYS PLC trimmed | 238,209 | $14M | 0.2% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 233,905 | $14M | 0.2% | 2026-Q1 |
| ADAR1 Capital Management, LLC added | 228,899 | $13M | 0.2% | 2026-Q1 |
| Patient Square Capital LP added | 227,000 | $13M | 0.2% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 201,785 | $12M | 0.2% | 2026-Q1 |
| Integral Health Asset Management, LLC new | 200,000 | $12M | 0.2% | 2026-Q1 |
| SILVERARC CAPITAL MANAGEMENT, LLC added | 197,759 | $11M | 0.2% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 189,080 | $11M | 0.2% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 188,505 | $11M | 0.2% | 2026-Q1 |
| NEXTBio Capital Management LP trimmed | 183,225 | $11M | 0.2% | 2026-Q1 |
| DNB Asset Management AS trimmed | 181,085 | $11M | 0.2% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 177,137 | $10M | 0.2% | 2026-Q1 |
| ExodusPoint Capital Management, LP added | 173,425 | $10M | 0.2% | 2026-Q1 |
| DEUTSCHE BANK AG\ trimmed | 162,682 | $9M | 0.2% | 2026-Q1 |
| Foresite Capital Management IV, LLC | 160,000 | $9M | 0.2% | 2026-Q1 |
| Swiss National Bank added | 157,700 | $9M | 0.2% | 2026-Q1 |
| Jump Financial, LLC added | 155,776 | $9M | 0.2% | 2026-Q1 |
| Woodline Partners LP added | 150,302 | $9M | 0.2% | 2026-Q1 |
| PEREGRINE CAPITAL MANAGEMENT LLC trimmed | 143,136 | $8M | 0.1% | 2026-Q1 |
| SAMLYN CAPITAL, LLC trimmed | 1,016,381 | $34M | 0.6% | 2025-Q1 stale |
| VANGUARD GROUP INC trimmed | 664,641 | $30M | 0.5% | 2025-Q4 stale |
| DIMENSIONAL FUND ADVISORS LP trimmed | 452,147 | $20M | 0.4% | 2025-Q4 stale |
| Saturn V Capital Management LP added | 503,701 | $20M | 0.4% | 2025-Q3 stale |
| Boxer Capital Management, LLC | 600,000 | $20M | 0.4% | 2025-Q1 stale |
| Deep Track Capital, LP trimmed | 366,435 | $16M | 0.3% | 2025-Q4 stale |
| Tri Locum Partners LP added | 366,102 | $15M | 0.3% | 2025-Q3 stale |
| TWO SIGMA ADVISERS, LP added | 259,320 | $12M | 0.2% | 2025-Q4 stale |
| Iron Triangle Partners LP new | 233,688 | $10M | 0.2% | 2025-Q4 stale |
| PERCEPTIVE ADVISORS LLC | 200,791 | $9M | 0.2% | 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.