ARBUTUS BIOPHARMA CORP (ABUS) Institutional Shareholders
ARBUTUS BIOPHARMA CORP (ABUS) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $673.86M in ABUS holdings during the latest filing period.
Two Seas Capital Lp is currently the largest disclosed institutional shareholder of ABUS tracked by InsiderSet, reporting ownership valued at approximately $91.66M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $96.43M, representing an estimated gain of +5.21% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 72% of the total disclosed ABUS value among the investors covered in this analysis. Major shareholders include Two Seas Capital Lp, Morgan Stanley, Whitefort Capital Management, Lp, and several other long-term asset managers with concentrated positions in ARBUTUS BIOPHARMA CORP (ABUS).
This page ranks the largest institutional ABUS shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
172
Total Reported Value
$673.86M
Largest Holder
Two Seas Capital Lp
Largest Position
$91.66M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
94
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Two Seas Capital Lp | 3.50% | 19,095,583 | $91,658,798 | $96,432,694 | +$4,773,896 | +5.21% | |
| Morgan Stanley | 0.00% | 17,698,305 | $84,951,868 | $89,376,440 | +$4,424,572 | +5.21% | |
| Whitefort Capital Management, Lp | 18.69% | 15,794,261 | $75,812,453 | $79,761,018 | +$3,948,565 | +5.21% | |
| Blackrock, Inc. | 0.00% | 13,766,071 | $66,077,140 | $69,518,659 | +$3,441,519 | +5.21% | |
| State Street Corp | 0.00% | 7,869,179 | $37,772,059 | $39,739,354 | +$1,967,295 | +5.21% | |
| Rubric Capital Management Lp | 0.33% | 7,532,937 | $36,158,098 | $38,041,332 | +$1,883,234 | +5.21% | |
| Vanguard Capital Management Llc | 0.00% | 7,010,679 | $33,651,259 | $35,403,929 | +$1,752,670 | +5.21% | |
| Barclays Plc | 0.01% | 4,207,914 | $20,197,987 | $21,249,966 | +$1,051,979 | +5.21% | |
| Geode Capital Management, Llc | 0.00% | 4,117,691 | $19,769,043 | $20,794,340 | +$1,025,297 | +5.19% | |
| Goldman Sachs Group Inc | 0.00% | 3,506,802 | $16,832,650 | $17,709,350 | +$876,700 | +5.21% | |
| Bank Of America Corp | 0.00% | 2,646,197 | $12,701,745 | $13,363,295 | +$661,550 | +5.21% | |
| Blackbarn Capital Partners Lp | 2.98% | 2,500,000 | $12,000,000 | $12,625,000 | +$625,000 | +5.21% | |
| Legal & General Group Plc | 0.00% | 2,466,127 | $11,837,409 | $12,453,941 | +$616,532 | +5.21% | |
| Woodline Partners Lp | 0.03% | 2,281,856 | $10,952,909 | $11,523,373 | +$570,464 | +5.21% | |
| Jefferies Financial Group Inc. | 0.08% | 1,711,672 | $8,216,026 | $8,643,944 | +$427,918 | +5.21% | |
| Nomura Holdings Inc | 0.03% | 1,637,081 | $7,857,989 | $8,267,259 | +$409,270 | +5.21% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,541,458 | $7,398,998 | $7,784,363 | +$385,365 | +5.21% | |
| Charles Schwab Investment Management Inc | 0.00% | 1,431,218 | $6,869,846 | $7,227,651 | +$357,805 | +5.21% | |
| Northern Trust Corp | 0.00% | 1,419,024 | $6,811,315 | $7,166,071 | +$354,756 | +5.21% | |
| Osaic Holdings, Inc. | 0.01% | 1,347,866 | $6,469,756 | $6,806,723 | +$336,967 | +5.21% | |
| Adar1 Capital Management, Llc | 0.29% | 1,268,147 | $6,087,106 | $6,404,142 | +$317,036 | +5.21% | |
| Deltroit Asset Management (Uk) Llp | 0.94% | 1,200,000 | $5,760,000 | $6,060,000 | +$300,000 | +5.21% | |
| Vanguard Fiduciary Trust Co | 0.00% | 1,135,362 | $5,449,738 | $5,733,578 | +$283,840 | +5.21% | |
| Citigroup Inc | 0.00% | 879,237 | $4,220,338 | $4,440,147 | +$219,809 | +5.21% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 838,210 | $3,771,945 | $4,232,961 | +$461,016 | +12.22% | |
| Bank Of Montreal | 0.00% | 777,938 | $3,734,102 | $3,928,587 | +$194,485 | +5.21% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 650,700 | $3,123,360 | $3,286,035 | +$162,675 | +5.21% | |
| Mackenzie Financial Corp | 0.00% | 613,806 | $2,946,269 | $3,099,720 | +$153,451 | +5.21% | |
| Los Angeles Capital Management Llc | 0.01% | 602,008 | $2,889,638 | $3,040,140 | +$150,502 | +5.21% | |
| Western Standard Llc | 0.88% | 542,787 | $2,605,378 | $2,741,074 | +$135,696 | +5.21% | |
| Rangeley Capital, Llc | 2.23% | 500,000 | $2,400,000 | $2,525,000 | +$125,000 | +5.21% | |
| Nuveen, Llc | 0.00% | 496,609 | $2,383,723 | $2,507,875 | +$124,152 | +5.21% | |
| Man Group Plc | 0.00% | 473,467 | $2,272,642 | $2,391,008 | +$118,366 | +5.21% | |
| Wellington Management Group Llp | 0.00% | 461,646 | $2,215,900 | $2,331,312 | +$115,412 | +5.21% | |
| Bank Of New York Mellon Corp | 0.00% | 454,115 | $2,179,752 | $2,293,281 | +$113,529 | +5.21% | |
| Centerbook Partners Lp | 0.10% | 445,151 | $2,136,725 | $2,248,013 | +$111,288 | +5.21% | |
| Freestone Capital Holdings, Llc | 0.06% | 442,500 | $2,124,000 | $2,234,625 | +$110,625 | +5.21% | |
| Citadel Advisors Llc | 0.00% | 404,696 | $1,942,541 | $2,043,715 | +$101,174 | +5.21% | |
| Kennedy Capital Management Llc | 0.03% | 385,298 | $1,849,430 | $1,945,755 | +$96,325 | +5.21% | |
| D. E. Shaw & Co., Inc. | 0.00% | 381,863 | $1,832,942 | $1,928,408 | +$95,466 | +5.21% | |
| Swiss National Bank | 0.00% | 286,500 | $1,375,200 | $1,446,825 | +$71,625 | +5.21% | |
| Ledgewood Wealth Advisors, Llc | 0.71% | 278,436 | $1,336,493 | $1,406,102 | +$69,609 | +5.21% | |
| Fmr Llc | 0.00% | 267,188 | $1,282,503 | $1,349,299 | +$66,796 | +5.21% | |
| Susquehanna Portfolio Strategies, Llc | 0.02% | 263,685 | $1,265,688 | $1,331,609 | +$65,921 | +5.21% | |
| Carrera Capital Advisors | 0.18% | 257,167 | $1,234,402 | $1,298,693 | +$64,291 | +5.21% | |
| Quinn Opportunity Partners Llc | 0.06% | 255,214 | $1,225,027 | $1,288,831 | +$63,804 | +5.21% | |
| Invesco Ltd. | 0.00% | 250,907 | $1,204,353 | $1,267,080 | +$62,727 | +5.21% | |
| Ubs Group Ag | 0.00% | 249,208 | $1,196,198 | $1,258,500 | +$62,302 | +5.21% | |
| State Of Wisconsin Investment Board | 0.00% | 242,017 | $1,161,682 | $1,222,186 | +$60,504 | +5.21% | |
| Campbell & Co Investment Adviser Llc | 0.06% | 230,534 | $1,106,563 | $1,164,197 | +$57,634 | +5.21% |
Frequently asked questions about ABUS
Who owns the most ABUS stock?
The largest holders of ABUS are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ARBUTUS BIOPHARMA CORP (ABUS).
Is ABUS widely held by superinvestors?
Many widely followed stocks like ABUS appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ABUS is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.