Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ABUS held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | MORGAN STANLEY | 25.9M | $116.5M | -3.0% | 13.107% | 0.01% |
| 2 | Two Seas Capital LP | 18.6M | $83.5M | +47.4% | 9.394% | 3.46% |
| 3 | Whitefort Capital Management, LP | 14.9M | $67.2M | +11.9% | 7.558% | 20.45% |
| 4 | BlackRock, Inc. | 13.0M | $58.4M | -0.7% | 6.564% | 0.00% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 6.7M | $30.1M | β | 3.386% | 0.00% |
| 6 | Rubric Capital Management LP | 6.6M | $29.8M | +320.6% | 3.354% | 0.37% |
| 7 | STATE STREET CORP | 6.3M | $28.5M | +7.3% | 3.211% | 0.00% |
| 8 | BARCLAYS PLC | 4.3M | $19.4M | +1110.1% | 2.185% | 0.01% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 3.8M | $17.0M | +2.6% | 1.909% | 0.00% |
| 10 | ADAR1 Capital Management, LLC | 3.1M | $14.1M | -42.1% | 1.586% | 0.88% |
| 11 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 2.7M | $12.0M | -38.6% | 1.349% | 0.02% |
| 12 | BlackBarn Capital Partners LP | 2.5M | $11.3M | +35.1% | 1.266% | 3.29% |
| 13 | Legal & General Group Plc | 2.4M | $10.8M | +1856.1% | 1.216% | 0.00% |
| 14 | Woodline Partners LP | 2.0M | $9.0M | -8.1% | 1.018% | 0.03% |
| 15 | Jefferies Financial Group Inc. | 1.9M | $8.5M | β | 0.959% | 0.06% |
| 16 | BANK OF AMERICA CORP /DE/ | 1.7M | $7.6M | -8.1% | 0.852% | 0.00% |
| 17 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.4M | $6.3M | -10.3% | 0.709% | 0.00% |
| 18 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.4M | $6.3M | β | 0.705% | 0.00% |
| 19 | ADVISOR GROUP HOLDINGS, INC. | 1.3M | $6.1M | -0.0% | 0.682% | 0.01% |
| 20 | CITIGROUP INC | 1.3M | $6.0M | -15.4% | 0.672% | 0.00% |
| 21 | NORTHERN TRUST CORP | 1.3M | $5.8M | +3.3% | 0.647% | 0.00% |
| 22 | GOLDMAN SACHS GROUP INC | 1.1M | $5.0M | +49.0% | 0.557% | 0.00% |
| 23 | VANGUARD FIDUCIARY TRUST CO | 1.1M | $4.8M | β | 0.538% | 0.00% |
| 24 | UBS ASSET MANAGEMENT AMERICAS INC | 838K | $3.8M | -5.9% | 0.424% | 0.00% |
| 25 | Deltroit Asset Management (UK) LLP | 800K | $3.6M | β | 0.405% | 0.60% |
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 ABUS β a direct measure of their conviction.
Filings activity in ABUS during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new ABUS position in Q1 2026
Institutions that fully closed their ABUS position in Q1 2026
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 | 164 | 4.1% | 74.17% | +3.18 pp | $624M | +4.5% |
| Q4 2025 | 171 | +3.6% | 70.99% | +6.20 pp | $597M | +9.6% |
| Q3 2025 | 165 | +2.5% | 64.79% | +21.34 pp | $545M | +49% |
| Q2 2025 | 161 | 1.8% | 43.45% | 2.73 pp | $366M | 5.9% |
| Q1 2025 | 164 | +7.9% | 46.18% | 23.02 pp | $389M | 33% |
| Q4 2024 | 152 | +7.8% | 69.20% | +22.52 pp | $582M | +48% |
| Q3 2024 | 141 | +9.3% | 46.68% | +10.37 pp | $393M | +29% |
| Q2 2024 | 129 | β | 36.31% | β | $306M | 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 ABUS stock.
Based on Q1 2026 13F filings, institutional ownership of Arbutus Biopharma Corporation stands at 74.2%, held across 164 reporting institutions.
MORGAN STANLEY is the largest reported institutional holder of ABUS, with approximately 25,891,480 shares worth $0.12B as of Q1 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of ABUS.
Our composite Smart Money Score for ABUS is 41 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
30 institutions opened new positions in ABUS during Q1 2026, while 37 fully exited. 33 added to existing positions and 100 trimmed.
ABUS institutional ownership rose by 3.18 percentage points quarter-over-quarter, with a net change of -7 holders.
The top 10 institutions account for 74.4% of all reported 13F value in ABUS, and the top 25 account for 91.5%.
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.
Arbutus Biopharma Corporation (ABUS) Institutional Ownership