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Arbutus Biopharma Corporation (ABUS) institutional ownership

Latest close $4.41 Jul 20, 2026
Market cap$626M 52-week range SectorHealthcare
Funds holding · Q1 2026
148
reported ABUS position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
70 buyers · 78 sellers

Arbutus Biopharma Corporation (ABUS) price and institutional activity

Dates

Q1 2026

$0 bought by 70 investors
Two Seas Capital LPRubric Capital Management LP +68 more
$0 sold by 78 investors
Adar1 Capital Management, LLCAdage Capital Partners Gp, L.L.C. +76 more
Bought Sold Totals per quarter; hover a bar for the names.

Arbutus Biopharma Corporation (ABUS) institutional activity · 148

Investor Type Est. change Change Δ Own Date
Two Seas Capital LP · Added
Change +6.0M Date Q1 2026
Two Seas Capital LP Added· Q1 2026 +6.0M Q1 2026
Rubric Capital Management LP · Added
Change +5.1M Date Q1 2026
Rubric Capital Management LP Added· Q1 2026 +5.1M Q1 2026
Barclays PLC · Added
Change +4.0M Date Q1 2026
Barclays PLC Added· Q1 2026 +4.0M Q1 2026
Adar1 Capital Management, LLC · Reduced
Change −2.3M Date Q1 2026
Adar1 Capital Management, LLC Reduced· Q1 2026 −2.3M Q1 2026
Legal & General · Added
Change +2.3M Date Q1 2026
Legal & General Added· Q1 2026 +2.3M Q1 2026
Jefferies Financial Group Inc. · New
Change +1.9M Date Q1 2026
Jefferies Financial Group Inc. New· Q1 2026 +1.9M Q1 2026
Adage Capital Partners Gp, L.L.C. · Reduced
Change −1.7M Date Q1 2026
Adage Capital Partners Gp, L.L.C. Reduced· Q1 2026 −1.7M Q1 2026
Whitefort Capital Management, LP · Added
Change +1.6M Date Q1 2026
Whitefort Capital Management, LP Added· Q1 2026 +1.6M Q1 2026
Stempoint Capital LP · Exited
Change −987K Δ Own −100.0% Date Q1 2026
Stempoint Capital LP Exited· Q1 2026 −987K −100.0% Q1 2026
Morgan Stanley · Reduced
Change −811K Date Q1 2026
Morgan Stanley Reduced· Q1 2026 −811K Q1 2026
Deltroit Asset Management (uk) LLP · New
Change +800K Date Q1 2026
Deltroit Asset Management (uk) LLP New· Q1 2026 +800K Q1 2026
Blackbarn Capital Partners LP · Added
Change +650K Date Q1 2026
Blackbarn Capital Partners LP Added· Q1 2026 +650K Q1 2026
Millennium Management LLC · New
Change +642K Date Q1 2026
Millennium Management LLC New· Q1 2026 +642K Q1 2026
Citadel Advisors LLC Added· Q1 2026 +572K +545.9% Q1 2026
State Street · Added
Change +434K Date Q1 2026
State Street Added· Q1 2026 +434K Q1 2026
Data through Q1 2026 · filed Jun 2, 2026
15 of 148

Famous investor activity in Arbutus Biopharma Corporation (ABUS)

Arbutus Biopharma Corporation (ABUS) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Sawhney Roger · Director Grant (A) 79K
Owned 79K Trade date Jun 8, 2026 Filed date Jun 10, 2026
Sawhney Roger Director Grant (A) 79K 79K Jun 8, 2026 Jun 10, 2026
Beardsley Robert A. · Director Grant (A) 79K
Owned 79K Trade date Jun 8, 2026 Filed date Jun 10, 2026
Beardsley Robert A. Director Grant (A) 79K 79K Jun 8, 2026 Jun 10, 2026
2 of 2

Arbutus Biopharma Corporation (ABUS) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Roivant Sciences Ltd. 38.8M
% of shares outstanding 29.1% Filing date Oct 20, 2021
Roivant Sciences Ltd. 38.8M 29.1% Oct 20, 2021
Morgan Stanley 19.4M
% of shares outstanding 10.3% Filing date Jun 10, 2024
Morgan Stanley 19.4M 10.3% Jun 10, 2024
Two Seas Capital LP 18.6M
% of shares outstanding 9.4% Filing date May 15, 2026
Two Seas Capital LP 18.6M 9.4% May 15, 2026
Whitefort Capital Management, LP 15.8M
% of shares outstanding 8.0% Filing date Apr 28, 2026
Whitefort Capital Management, LP 15.8M 8.0% Apr 28, 2026
BlackRock Inc. 10.4M
% of shares outstanding 6.2% Filing date Feb 12, 2024
BlackRock Inc. 10.4M 6.2% Feb 12, 2024
Two Seas Capital LP 8.4M
% of shares outstanding 4.4% Filing date Nov 14, 2024
Two Seas Capital LP 8.4M 4.4% Nov 14, 2024
Rtw Investments, LP 2.5M
% of shares outstanding 1.7% Filing date Feb 14, 2022
Rtw Investments, LP 2.5M 1.7% Feb 14, 2022
7 of 7

Arbutus Biopharma Corporation (ABUS) ownership FAQ

Who owns ABUS?

148 reporting institutions disclosed ABUS position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.