ARBUTUS BIOPHARMA CORP ABUS
COM · Common Stock · CUSIP 03879J100 · ISIN CA03879J1003
Canadian Bio Tech Company
- SectorHealth care
- IndustryPharmaceutical Preparations
- HeadquartersWarminster, PA
- Founded2007
- Websitearbutusbio.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($22.2k this quarter). Holder counts are more reliable. Shares outstanding: 191.5m as of 2025-03-25, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $3.49. Options: 12 managers hold calls ($3.1m notional), 11 hold puts ($2.3m).
Trends to Q1 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 127 |
| Q4 2022 | 115 |
| Q1 2023 | 123 |
| Q2 2023 | 112 |
| Q3 2023 | 101 |
| Q4 2023 | 113 |
| Q1 2024 | 120 |
| Q2 2024 | 132 |
| Q3 2024 | 145 |
| Q4 2024 | 155 |
| Q1 2025 | 169 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2023 | 48 | 53 |
| Q3 2023 | 41 | 39 |
| Q4 2023 | 48 | 35 |
| Q1 2024 | 52 | 48 |
| Q2 2024 | 69 | 41 |
| Q3 2024 | 72 | 44 |
| Q4 2024 | 71 | 54 |
| Q1 2025 | 69 | 60 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2024 | $11.0m | $1.3m | 0.12 |
| Q3 2024 | $9.3m | $2.2m | 0.23 |
| Q4 2024 | $2.4m | $2.4m | 0.98 |
| Q1 2025 | $3.1m | $2.3m | 0.73 |
Biggest buyers
| FOURSIXTHREE CAPITAL LP | New | +2.5m |
| Woodline Partners LP | Added | +1.7m |
| GOLDMAN SACHS GROUP INC | Added | +1.5m |
| MORGAN STANLEY | Added | +1.2m |
| Two Seas Capital LP | Added | +725.0k |
| STEMPOINT CAPITAL LP | New | +467.9k |
| Aberdeen Group plc | New | +467.4k |
| ADAR1 Capital Management, LLC | Added | +324.3k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | +287.1k |
| JANE STREET GROUP, LLC | New | +280.8k |
Biggest sellers
| STATE STREET CORP | Reduced | -663.1k |
| JPMORGAN CHASE & CO | Reduced | -357.6k |
| BlackRock, Inc. | Reduced | -170.8k |
| Squarepoint Ops LLC | Reduced | -160.7k |
| LMR Partners LLP | Sold out | -158.2k |
| CITADEL ADVISORS LLC | Reduced | -126.1k |
| Rangeley Capital, LLC | Reduced | -110.0k |
| Qube Research & Technologies Ltd | Reduced | -95.0k |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | Reduced | -87.2k |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Reduced | -75.0k |
Biggest calls
| CITIGROUP INC | Added | $1.3m359.9k shares |
| Eisler Capital Management Ltd. | New | $422.4k120.0k shares |
| NOMURA HOLDINGS INC | New | $349.0k100.0k shares |
| Caption Management, LLC | Reduced | $261.8k75.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $228.9k65.6k shares |
| JANE STREET GROUP, LLC | New | $195.1k55.9k shares |
| CITADEL ADVISORS LLC | Reduced | $132.3k37.9k shares |
| WOLVERINE TRADING, LLC | Reduced | $93.5k26.7k shares |
| Squarepoint Ops LLC | New | $87.2k25.0k shares |
| GROUP ONE TRADING LLC | Reduced | $43.6k12.5k shares |
Biggest puts
| CITIGROUP INC | Added | $697.7k199.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $493.5k141.4k shares |
| NOMURA HOLDINGS INC | New | $349.0k100.0k shares |
| Caption Management, LLC | Reduced | $261.8k75.0k shares |
| CITADEL ADVISORS LLC | Reduced | $89.3k25.6k shares |
| Squarepoint Ops LLC | Reduced | $87.2k25.0k shares |
| WOLVERINE TRADING, LLC | Added | $81.2k23.2k shares |
| GROUP ONE TRADING LLC | Reduced | $69.8k20.0k shares |
| SIMPLEX TRADING, LLC | Reduced | $69.0k19.9k shares |
| JANE STREET GROUP, LLC | New | $62.1k17.8k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
Roivant Sciences Ltd.
13D · may seek influence
-1.0 pts · filed 2026-10-05
Stated purposeItem 4 is hereby amended by adding the following to the end thereof: On August 24, 2026, the Issuer commenced a modified Dutch auction tender offer to purchase for cancellation up to US$230 million in value of its Common Shares at prices between US$5.00 and US$5.75 per Common Share (the "Offer"), which included the option for shareholders to make a proportionate tender. Roivant made a proportionate tender of its Common Shares in the Offer in order to maintain its proportionate ownership of the Common Shares following completion of the Offer. The Offer expired at 5:00 p.m., New York City time, on September 29, 2026. On October 1, 2026, the Issuer announced that it had taken up and accepted for purchase 46,000,000 Common Shares at a purchase price of US$5.00 per Common Share, including 8,96… Full filing |
19.5% |
| MORGAN STANLEY 13G · institution +3.4 pts · filed 2026-10-07 | 12.2% |
| Two Seas Capital LP 13G · institution +2.9 pts · filed 2026-05-15 | 9.4% |
| Whitefort Capital Management, LP 13G · passive investor no change · filed 2026-09-04 | 8.0% |
| BlackRock, Inc. 13G · institution filed 2026-10-27 | 7.2% |
Insider purchases and sales in Q1 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2023 | 0 | — | 0 | — | — |
| Q3 2023 | 0 | — | 0 | — | — |
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 0 | — | 4 | $78.8k | $78.8k |
| Q2 2024 | 0 | — | 0 | — | — |
| Q3 2024 | 0 | — | 1 | $32.6k | — |
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 4 | $251.4k | $251.4k |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-02-04 | McElhaugh Michael J. Interim President & CEO, director | Sold plan | $78.0k23.8k shares |
| 2025-02-04 | HASTINGS DAVID C Chief Financial Officer | Sold plan | $72.8k22.2k shares |
| 2025-02-04 | Sims Karen Chief Medical Officer | Sold plan | $63.5k19.3k shares |
| 2025-02-04 | Naftzger J. Christopher General Counsel and CCO | Sold plan | $37.2k11.3k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q1 2025
| Manager | Shares | Change |
|---|---|---|
| MORGAN STANLEY 0.01% of their portfolio | 23.8m $83.0m | Added +1.2m |
| Whitefort Capital Management, LP 21.85% of their portfolio | 13.3m $46.4m | Added +66.1k |
| BlackRock, Inc. 0.00% of their portfolio | 12.8m $44.6m | Reduced -170.8k |
| Two Seas Capital LP 5.14% of their portfolio | 9.5m $33.0m | Added +725.0k |
| VANGUARD GROUP INC 0.00% of their portfolio | 9.0m $31.2m | Reduced -27.0k |
| STATE STREET CORP 0.00% of their portfolio | 4.4m $15.2m | Reduced -663.1k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 3.5m $12.4m | Added +59.0k |
| Woodline Partners LP 0.06% of their portfolio | 2.7m $9.3m | Added +1.7m |
| FOURSIXTHREE CAPITAL LP 4.03% of their portfolio | 2.5m $8.6m | New |
| BlackBarn Capital Partners LP 2.79% of their portfolio | 2.3m $8.2m | Unchanged |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 2.1m $7.2m | Added +1.5m |
| ADAR1 Capital Management, LLC 1.26% of their portfolio | 1.9m $6.6m | Added +324.3k |
| Rubric Capital Management LP 0.11% of their portfolio | 1.7m $5.9m | Unchanged |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.01% of their portfolio | 1.6m $5.5m | Reduced -75.0k |
| Rangeley Capital, LLC 5.31% of their portfolio | 1.3m $4.7m | Reduced -110.0k |
| OSAIC HOLDINGS, INC. 0.01% of their portfolio | 1.3m $4.7m | Reduced -2.4k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 1.3m $4.5m | Reduced -47.1k |
| Hudson Bay Capital Management LP 0.03% of their portfolio | 1.2m $4.3m | Added +133.4k |
| FourWorld Capital Management LLC 2.94% of their portfolio | 1.2m $4.3m | Unchanged |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 1.2m $4.3m | Reduced -136 |
| Saba Capital Management, L.P. 0.09% of their portfolio | 979.5k $3.4m | Added +91.5k |
| BANK OF MONTREAL /CAN/ 0.00% of their portfolio | 581.1k $2.0m | Added +125.2k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 538.6k $1.9m | Reduced -357.6k |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 510.5k $1.8m | Reduced -2.8k |
| STEMPOINT CAPITAL LP 0.52% of their portfolio | 467.9k $1.6m | New |
| Aberdeen Group plc 0.00% of their portfolio | 467.4k $1.6m | New |
| Quinn Opportunity Partners LLC 0.11% of their portfolio | 464.5k $1.6m | Added +59.6k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 458.2k $1.6m | Added +96.9k |
| Freestone Capital Holdings, LLC 0.06% of their portfolio | 442.5k $1.5m | Unchanged |
| KENNEDY CAPITAL MANAGEMENT LLC 0.03% of their portfolio | 419.3k $1.5m | Reduced -1.4k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 402.4k $1.4m | Added +287.1k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 348.8k $1.2m | Reduced -4.6k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 348.2k $1.2m | Added +5.2k |
| Nuveen, LLC 0.00% of their portfolio | 313.3k $1.1m | First filing |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 295.3k $1.0m | Reduced -95.0k |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 280.8k $979.9k | New |
| Ledgewood Wealth Advisors, LLC 0.63% of their portfolio | 278.4k $971.7k | Unchanged |
| Swiss National Bank 0.00% of their portfolio | 276.3k $964.3k | Unchanged |
| Eisler Capital Management Ltd. 0.03% of their portfolio | 275.0k $968.0k | New |
| CITIGROUP INC 0.00% of their portfolio | 261.8k $913.8k | Added +74.1k |
| BARCLAYS PLC 0.00% of their portfolio | 226.2k $789.3k | Reduced -72.1k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 200.8k $700.6k | Added +12.2k |
| UBS Group AG 0.00% of their portfolio | 192.3k $671.1k | Added +91.3k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 183.2k $639.5k | First filing |
| BOOTHBAY FUND MANAGEMENT, LLC 0.02% of their portfolio | 162.3k $566.3k | Unchanged |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 151.4k $528.4k | Reduced -126.1k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 146.9k $512.6k | Reduced -24.9k |
| Invesco Ltd. 0.00% of their portfolio | 139.5k $486.7k | Added +69.6k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 132.8k $463.3k | Unchanged |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 120.2k $419.6k | Unchanged |
| Legal & General Group Plc 0.00% of their portfolio | 118.4k $413.2k | Reduced -296 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.01% of their portfolio | 115.3k $402.4k | Reduced -87.2k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 115.0k $401.2k | Added +11.0k |
| Wealth Management Associates, Inc. 0.14% of their portfolio | 96.4k $336.5k | Added +35.4k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 92.4k $322.6k | Added +280 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 91.2k $318.2k | Added +1.8k |
| MetLife Investment Management, LLC 0.00% of their portfolio | 88.9k $310.2k | Added +7.2k |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio | 84.2k $293.7k | Reduced -5.5k |
| VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 83.0k $289.8k | Added +37.0k |
| Rafferty Asset Management, LLC 0.00% of their portfolio | 82.9k $289.2k | Reduced -63.9k |
| Clear Harbor Asset Management, LLC 0.02% of their portfolio | 79.8k $278.4k | Unchanged |
| ExodusPoint Capital Management, LP 0.00% of their portfolio | 79.5k $277.0k | New |
| SBI Securities Co., Ltd. 0.01% of their portfolio | 78.9k $275.3k | Added +6.6k |
| FMR LLC 0.00% of their portfolio | 78.0k $272.3k | Added +101 |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.00% of their portfolio | 76.0k $265.3k | Added +6.4k |
| INTECH INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 75.8k $264.7k | Added +18.8k |
| XTX Topco Ltd 0.01% of their portfolio | 72.4k $252.7k | Added +19.8k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 72.2k $251.9k | Added +1.6k |
| Corebridge Financial, Inc. 0.00% of their portfolio | 71.6k $249.8k | Reduced -1.1k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 65.5k $229.0k | Added +9.1k |
| Rockefeller Capital Management L.P. 0.00% of their portfolio | 63.0k $219.9k | Reduced -43.6k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 62.2k $218.0k | Added +28.2k |
| Creative Planning 0.00% of their portfolio | 62.1k $216.7k | Added +13.7k |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 60.9k $212.8k | Unchanged |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 55.8k $194.8k | Added +315 |
| SG Americas Securities, LLC 0.00% of their portfolio | 50.0k $174.0k | Reduced -19.1k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 48.2k $168.1k | Reduced -554 |
| Virtus Investment Advisers, LLC 0.04% of their portfolio | 46.1k $160.9k | New |
| GROUP ONE TRADING LLC 0.01% of their portfolio | 41.1k $143.4k | Reduced -11.1k |
| ARIZONA STATE RETIREMENT SYSTEM 0.00% of their portfolio | 40.7k $142.1k | Reduced -325 |
| ProShare Advisors LLC 0.00% of their portfolio | 40.2k $140.2k | Reduced -9.9k |
| Premier Path Wealth Partners, LLC 0.02% of their portfolio | 40.0k $139.6k | Unchanged |
| VIRGINIA RETIREMENT SYSTEMS ET Al 0.00% of their portfolio | 39.6k $138.2k | First filing |
| TEACHER RETIREMENT SYSTEM OF TEXAS 0.00% of their portfolio | 38.2k $133.5k | Reduced -3.9k |
| China Universal Asset Management Co., Ltd. 0.01% of their portfolio | 38.0k $132.7k | Reduced -2.2k |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 36.1k $126.0k | Added +16.2k |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio | 35.8k $125.0k | Unchanged |
| CIBC WORLD MARKETS CORP 0.00% of their portfolio | 32.4k $113.1k | Added +18.7k |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 30.0k $104.6k | Unchanged |
| MONETA GROUP INVESTMENT ADVISORS LLC 0.00% of their portfolio | 26.0k $90.7k | Unchanged |
| KLP KAPITALFORVALTNING AS 0.00% of their portfolio | 25.6k $89.3k | Unchanged |
| Caption Management, LLC 0.00% of their portfolio | 24.2k $84.4k | Reduced -45.4k |
| Pictet Asset Management Holding SA 0.00% of their portfolio | 23.9k $83.5k | Added +11.0k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 21.9k $76.3k | Unchanged |
| Ensign Peak Advisors, Inc 0.00% of their portfolio | 21.9k $76.3k | New |
| MERCER GLOBAL ADVISORS INC /ADV 0.00% of their portfolio | 20.5k $71.5k | Unchanged |
| PROFUND ADVISORS LLC 0.00% of their portfolio | 19.1k $66.7k | Reduced -11.1k |
| Balyasny Asset Management L.P. 0.00% of their portfolio | 18.9k $66.0k | Reduced -22.8k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 18.8k $65.6k | Reduced -116 |
| EntryPoint Capital, LLC 0.03% of their portfolio | 18.7k $65.4k | New |