Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in XBIT held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 293K | $689K | +1.6% | 0.961% | 0.00% |
| 2 | GEODE CAPITAL MANAGEMENT, LLC | 231K | $543K | +4.5% | 0.758% | 0.00% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 201K | $472K | β | 0.659% | 0.00% |
| 4 | RBF Capital, LLC | 199K | $466K | 0.0% | 0.651% | 0.02% |
| 5 | MORGAN STANLEY | 166K | $389K | +1.3% | 0.543% | 0.00% |
| 6 | MILLENNIUM MANAGEMENT LLC | 106K | $248K | -22.1% | 0.346% | 0.00% |
| 7 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 98K | $231K | +9.9% | 0.323% | 0.00% |
| 8 | VANGUARD FIDUCIARY TRUST CO | 92K | $215K | β | 0.300% | 0.00% |
| 9 | NORTHERN TRUST CORP | 76K | $179K | -0.5% | 0.250% | 0.00% |
| 10 | STATE STREET CORP | 73K | $172K | 0.0% | 0.239% | 0.00% |
| 11 | JANE STREET GROUP, LLC | 60K | $141K | -13.8% | 0.197% | 0.00% |
| 12 | Empowered Funds, LLC | 60K | $140K | 0.0% | 0.195% | 0.00% |
| 13 | Squarepoint Ops LLC | 41K | $97K | -35.6% | 0.135% | 0.00% |
| 14 | Bank of New York Mellon Corp | 39K | $92K | -18.8% | 0.129% | 0.00% |
| 15 | BANK OF AMERICA CORP /DE/ | 37K | $86K | +2.2% | 0.120% | 0.00% |
| 16 | DIMENSIONAL FUND ADVISORS LP | 36K | $85K | -28.9% | 0.118% | 0.00% |
| 17 | Connor, Clark & Lunn Investment Management Ltd. | 29K | $67K | -5.2% | 0.094% | 0.00% |
| 18 | BNP PARIBAS ARBITRAGE, SA | 27K | $64K | +1.1% | 0.089% | 0.00% |
| 19 | NATIONAL BANK OF CANADA /FI/ | 25K | $59K | 0.0% | 0.082% | 0.00% |
| 20 | RENAISSANCE TECHNOLOGIES LLC | 22K | $53K | β | 0.074% | 0.00% |
| 21 | AMERICAN CENTURY COMPANIES INC | 19K | $44K | 0.0% | 0.062% | 0.00% |
| 22 | Qube Research & Technologies Ltd | 19K | $44K | -9.3% | 0.061% | 0.00% |
| 23 | XTX Topco Ltd | 18K | $42K | -17.5% | 0.059% | 0.00% |
| 24 | Pinnacle Financial Partners, Inc. | 12K | $28K | 0.0% | 0.039% | 0.00% |
| 25 | Vanguard Global Advisers, LLC | 7K | $16K | β | 0.023% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in XBIT β a direct measure of their conviction.
Filings activity in XBIT during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 36 | 12% | 6.56% | 1.13 pp | $5M | 15% |
| Q4 2025 | 41 | 13% | 7.69% | 3.16 pp | $5M | 29% |
| Q3 2025 | 47 | 11% | 10.85% | 3.36 pp | $8M | 24% |
| Q2 2025 | 53 | 5.4% | 14.21% | 7.25 pp | $10M | 34% |
| Q1 2025 | 56 | +5.7% | 21.46% | 4.39 pp | $15M | 17% |
| Q4 2024 | 53 | +3.9% | 25.85% | 26.15 pp | $18M | 50% |
| Q3 2024 | 51 | +11% | 52.00% | +19.86 pp | $37M | +62% |
| Q2 2024 | 46 | β | 32.14% | β | $23M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying XBIT stock.
Based on Q1 2026 13F filings, institutional ownership of XBiotech Inc. stands at 6.6%, held across 36 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of XBIT, with approximately 293,104 shares worth $0.00B as of Q1 2026.
Yes β 3 widely-followed marquee investors appear among the top 25 institutional holders of XBIT, including MILLENNIUM MANAGEMENT LLC, JANE STREET GROUP, LLC, RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for XBIT is 43 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
6 institutions opened new positions in XBIT during Q1 2026, while 11 fully exited. 4 added to existing positions and 22 trimmed.
XBIT institutional ownership fell by 1.13 percentage points quarter-over-quarter, with a net change of -5 holders.
The top 10 institutions account for 77.0% of all reported 13F value in XBIT, and the top 25 account for 99.6%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
XBiotech Inc. (XBIT) Institutional Ownership