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. Holder counts are more reliable. Shares outstanding: 188.7m as of 2024-04-30, 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 ≈ $2.58. Options: 12 managers hold calls ($12.8m notional), 7 hold puts ($1.6m).
Trends to Q1 2024
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 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 56 | 54 |
| Q1 2023 | 58 | 42 |
| Q2 2023 | 48 | 53 |
| Q3 2023 | 41 | 39 |
| Q4 2023 | 48 | 35 |
| Q1 2024 | 52 | 48 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2023 | $2.3m | $1.1m | 0.48 |
| Q3 2023 | $1.7m | $1.1m | 0.63 |
| Q4 2023 | $4.7m | $3.9m | 0.85 |
| Q1 2024 | $12.8m | $1.6m | 0.13 |
Biggest buyers
| MORGAN STANLEY | Added | +12.5m |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | New | +3.0m |
| BlackBarn Capital Partners LP | New | +2.1m |
| FourWorld Capital Management LLC | Added | +1.9m |
| Corbin Capital Partners, L.P. | New | +853.3k |
| WELLINGTON MANAGEMENT GROUP LLP | New | +451.3k |
| Saba Capital Management, L.P. | New | +373.5k |
| STATE STREET CORP | Added | +215.1k |
| CITIGROUP INC | Added | +205.6k |
| BOOTHBAY FUND MANAGEMENT, LLC | Added | +158.6k |
Biggest sellers
| ADAR1 Capital Management, LLC | Reduced | -1.4m |
| MILLENNIUM MANAGEMENT LLC | Reduced | -1.3m |
| Two Seas Capital LP | Reduced | -1.2m |
| Assenagon Asset Management S.A. | Sold out | -817.6k |
| Woodline Partners LP | Reduced | -649.2k |
| Hudson Bay Capital Management LP | Reduced | -619.5k |
| Whitefort Capital Management, LP | Reduced | -334.9k |
| Tejara Capital Ltd | Sold out | -180.1k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | -157.1k |
| BARCLAYS PLC | Reduced | -126.8k |
Biggest calls
| FourWorld Capital Management LLC | New | $4.1m1.6m shares |
| Squarepoint Ops LLC | New | $3.7m1.4m shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $3.2m1.2m shares |
| CITIGROUP INC | Reduced | $606.3k235.0k shares |
| GROUP ONE TRADING LLC | Reduced | $300.8k116.6k shares |
| Centiva Capital, LP | Added | $263.7k102.2k shares |
| LMR Partners LLP | New | $258.0k100.0k shares |
| CITADEL ADVISORS LLC | Reduced | $240.2k93.1k shares |
| Caption Management, LLC | Reduced | $90.3k35.0k shares |
| SIMPLEX TRADING, LLC | Reduced | $87.0k33.8k shares |
Biggest puts
| CITIGROUP INC | Added | $606.3k235.0k shares |
| Centiva Capital, LP | Reduced | $483.5k187.4k shares |
| CITADEL ADVISORS LLC | Added | $275.3k106.7k shares |
| SIMPLEX TRADING, LLC | Added | $167.0k65.1k shares |
| GROUP ONE TRADING LLC | Reduced | $51.9k20.1k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $43.9k17.0k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 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 2024
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 2022 | 0 | — | 0 | — | — |
| Q3 2022 | 0 | — | 0 | — | — |
| Q4 2022 | 0 | — | 0 | — | — |
| Q1 2023 | 0 | — | 0 | — | — |
| Q2 2023 | 0 | — | 0 | — | — |
| Q3 2023 | 0 | — | 0 | — | — |
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 0 | — | 4 | $78.8k | $78.8k |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2024-02-02 | McElhaugh Michael J. Interim President & CEO, director | Sold plan | $23.5k10.2k shares |
| 2024-02-02 | Sofia Michael J. Chief Scientific Officer | Sold plan | $23.1k10.0k shares |
| 2024-02-02 | HASTINGS DAVID C Chief Financial Officer | Sold plan | $22.2k9.6k shares |
| 2024-02-02 | Sims Karen Chief Medical Officer | Sold plan | $10.1k4.4k 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 2024
| Manager | Shares | Change |
|---|---|---|
| MORGAN STANLEY 0.00% of their portfolio | 26.5m $68.3m | Added +12.5m |
| Whitefort Capital Management, LP 20.21% of their portfolio | 12.9m $33.2m | Reduced -334.9k |
| BlackRock Inc. 0.00% of their portfolio | 10.4m $26.8m | Added +14.3k |
| Two Seas Capital LP 3.96% of their portfolio | 7.8m $20.2m | Reduced -1.2m |
| VANGUARD GROUP INC 0.00% of their portfolio | 6.0m $15.4m | Reduced -976 |
| Woodline Partners LP 0.10% of their portfolio | 4.1m $10.5m | Reduced -649.2k |
| Hudson Bay Capital Management LP 0.08% of their portfolio | 3.5m $9.1m | Reduced -619.5k |
| FourWorld Capital Management LLC 7.17% of their portfolio | 3.0m $7.7m | Added +1.9m |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.01% of their portfolio | 3.0m $7.7m | New |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 3.0m $7.6m | Added +141.2k |
| STATE STREET CORP 0.00% of their portfolio | 2.6m $6.7m | Added +215.1k |
| ADAR1 Capital Management, LLC 1.46% of their portfolio | 2.1m $5.4m | Reduced -1.4m |
| BlackBarn Capital Partners LP 3.09% of their portfolio | 2.1m $5.3m | New |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 2.0m $5.1m | Added +61.8k |
| OSAIC HOLDINGS, INC. 0.01% of their portfolio | 1.4m $3.5m | Unchanged |
| Centiva Capital, LP 0.20% of their portfolio | 1.4m $3.5m | Reduced -67.8k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 1.1m $2.7m | Reduced -11.6k |
| Corbin Capital Partners, L.P. 3.93% of their portfolio | 853.3k $2.2m | New |
| BOOTHBAY FUND MANAGEMENT, LLC 0.04% of their portfolio | 612.3k $1.6m | Added +158.6k |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 451.3k $1.2m | New |
| KENNEDY CAPITAL MANAGEMENT LLC 0.02% of their portfolio | 436.5k $1.1m | Added +49.3k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 407.6k $1.1m | Reduced -49.2k |
| Saba Capital Management, L.P. 0.02% of their portfolio | 373.5k $963.5k | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 349.4k $901.5k | Added +57.4k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 339.2k $875.2k | Reduced -10.1k |
| BANK OF MONTREAL /CAN/ 0.00% of their portfolio | 334.3k $872.4k | Reduced -18.0k |
| Nuveen Asset Management, LLC 0.00% of their portfolio | 294.2k $758.9k | Unchanged |
| Ledgewood Wealth Advisors, LLC 0.67% of their portfolio | 278.4k $718.4k | Unchanged |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 242.2k $624.9k | Reduced -1.3m |
| CITIGROUP INC 0.00% of their portfolio | 226.9k $585.4k | Added +205.6k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 176.3k $454.8k | Reduced -54.7k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 174.7k $450.7k | Added +48.1k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 170.5k $439.8k | Added +5.8k |
| FMR LLC 0.00% of their portfolio | 165.8k $427.9k | Added +498 |
| UBS Group AG 0.00% of their portfolio | 134.8k $347.8k | Reduced -5.1k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 126.2k $325.6k | Added +43.8k |
| Clear Harbor Asset Management, LLC 0.03% of their portfolio | 116.3k $300.0k | Reduced -23.0k |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.01% of their portfolio | 102.9k $265.5k | New |
| Lighthouse Investment Partners, LLC 0.02% of their portfolio | 99.1k $255.6k | New |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 97.9k $252.6k | Reduced -105.9k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 96.0k $247.8k | Unchanged |
| BARCLAYS PLC 0.00% of their portfolio | 89.2k $230.1k | Reduced -126.8k |
| SIMPLEX TRADING, LLC 0.01% of their portfolio | 88.1k $227.0k | Reduced -16.3k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 73.1k $188.0k | Reduced -34.1k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 72.9k $188.0k | Added +6.3k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 68.5k $176.6k | Reduced -23.5k |
| GROUP ONE TRADING LLC 0.01% of their portfolio | 66.0k $170.2k | Added +58.7k |
| AMERICAN INTERNATIONAL GROUP, INC. 0.00% of their portfolio | 62.4k $161.1k | Reduced -536 |
| MetLife Investment Management, LLC 0.00% of their portfolio | 61.9k $159.6k | Added +2.9k |
| LMR Partners LLP 0.00% of their portfolio | 60.0k $154.8k | Unchanged |
| Invesco Ltd. 0.00% of their portfolio | 59.5k $153.6k | Added +2.9k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 53.1k $137.1k | Added +965 |
| GTS SECURITIES LLC 0.00% of their portfolio | 50.1k $129.3k | Added +18.7k |
| COWEN AND COMPANY, LLC 0.01% of their portfolio | 50.0k $129.0k | Unchanged |
| Wealth Management Associates, Inc. 0.07% of their portfolio | 49.8k $153.9k | Added +1.8k |
| VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 44.9k $115.9k | Reduced -11.4k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 44.3k $114.4k | Reduced -658 |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 44.1k $113.8k | Reduced -52.4k |
| Tidal Investments LLC 0.00% of their portfolio | 43.2k $111.3k | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 42.9k $110.7k | Added +5.3k |
| VERUS CAPITAL PARTNERS, LLC 0.01% of their portfolio | 41.9k $108.2k | Added +9.8k |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 41.4k $106.9k | Reduced -4.1k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 36.4k $94.0k | Added +6.6k |
| National Philanthropic Trust 0.00% of their portfolio | 36.2k $93.4k | Reduced -1.5k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 34.9k $90.1k | Reduced -157.1k |
| ProShare Advisors LLC 0.00% of their portfolio | 34.5k $89.0k | Added +2.8k |
| China Universal Asset Management Co., Ltd. 0.01% of their portfolio | 32.2k $83.2k | Added +12.8k |
| Premier Path Wealth Partners, LLC 0.01% of their portfolio | 30.5k $78.7k | Added +8.3k |
| Creative Planning 0.00% of their portfolio | 29.9k $77.0k | Added +15.3k |
| SCOTIA CAPITAL INC. 0.00% of their portfolio | 29.0k $74.9k | Unchanged |
| MONETA GROUP INVESTMENT ADVISORS LLC 0.00% of their portfolio | 25.0k $64.5k | Unchanged |
| Kades & Cheifetz LLC 0.03% of their portfolio | 20.0k $51.6k | Unchanged |
| SG Americas Securities, LLC 0.00% of their portfolio | 19.6k $51.0k | Reduced -26.5k |
| PFG Investments, LLC 0.00% of their portfolio | 19.2k $49.5k | New |
| BUCKINGHAM STRATEGIC WEALTH, LLC 0.00% of their portfolio | 17.7k $45.7k | Unchanged |
| TWO SIGMA ADVISERS, LP 0.00% of their portfolio | 17.6k $45.4k | Reduced -13.4k |
| FIRST MANHATTAN CO. LLC. 0.00% of their portfolio | 14.0k $36.1k | Unchanged |
| Walleye Trading LLC 0.00% of their portfolio | 14.0k $36.1k | New |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 13.5k $35.0k | New |
| Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio | 13.3k $34.2k | New |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 12.7k $32.9k | Reduced -8.1k |
| WMG Financial Advisors, LLC 0.02% of their portfolio | 12.6k $32.5k | Unchanged |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 12.6k $32.5k | Unchanged |
| Legal & General Group Plc 0.00% of their portfolio | 12.3k $31.8k | Unchanged |
| FEDERATED HERMES, INC. 0.00% of their portfolio | 11.0k $28.5k | New |
| Kestra Advisory Services, LLC 0.00% of their portfolio | 11.0k $28.4k | New |
| Front Row Advisors LLC 0.01% of their portfolio | 10.5k $27.1k | Unchanged |
| Brevan Howard Capital Management LP 0.00% of their portfolio | 10.5k $27.0k | Reduced -7.3k |
| Pathstone Holdings, LLC 0.00% of their portfolio | 10.2k $26.2k | Unchanged |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 9.1k $23.5k | Unchanged |
| Farther Finance Advisors, LLC 0.00% of their portfolio | 8.0k $20.5k | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio | 6.9k $17.8k | New |
| Dynamic Wealth Strategies, LLC 0.01% of their portfolio | 6.3k $16.0k | Unchanged |
| CIBC Private Wealth Group LLC 0.00% of their portfolio | 5.5k $14.0k | New |
| CAMBRIDGE TRUST CO 0.00% of their portfolio | 5.0k $12.9k | Unchanged |
| Metropolitan Life Insurance Co/NY 0.00% of their portfolio | 4.3k $11.2k | Added +1.4k |
| Steward Partners Investment Advisory, LLC 0.00% of their portfolio | 4.0k $10.3k | Unchanged |
| NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio | 3.8k $9.9k | Unchanged |
| AMALGAMATED BANK 0.00% of their portfolio | 3.8k $10.0k | Reduced -10.9k |
| Financial Synergies Wealth Advisors, Inc. 0.00% of their portfolio | 3.6k $9.3k | Reduced -3.8k |