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Arbutus Biopharma Corp

ABUS
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001447028

No open-market purchases or sales by Arbutus Biopharma Corp insiders were filed in the last 90 days; 176 institutions reported holding it in 13F filings for Q2 2026, worth $674.9M in total; no superinvestor holds it.

Holders of 5% or more of ABUS

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Arbutus Biopharma Corp, largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of ABUS
HolderLatest formStakeChangeFirst filedLatest filingFiling
Roivant Sciences Ltd.13D/A19.50%29.9M shares−1.00 ppfrom 20.50%Oct 20, 20214 filingsOct 5, 2026SEC
Morgan Stanley13G/A12.20%18.7M shares+3.40 ppfrom 8.80%Feb 10, 20216 filingsOct 7, 2026SEC
Two Seas Capital LP13G/A9.40%18.6M shares+2.90 ppfrom 6.50%Nov 21, 20236 filingsMay 15, 2026SEC
Whitefort Capital Management, LP13G8.00%15.8M shares0.00 ppfrom 8.00%Sep 11, 20238 filingsSep 4, 2026SEC
BlackRock, Inc.13G/A7.20%14.3M shares–Oct 27, 20261 filingOct 27, 2026SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

30 Schedule 13D and 13G filings on Arbutus Biopharma Corp, newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on ABUS
Filed (ET)FilerFormStakeChangeEvent dateFiling
Oct 27, 20265:25 PM ETBlackRock, Inc.13G/A7.20%14.3M shares–Sep 30, 2026SEC
Oct 7, 20264:35 PM ETMorgan Stanleyand 1 other13G/A12.20%18.7M shares+3.40 ppfrom 8.80%Sep 30, 2026SEC
Oct 5, 20269:02 PM ETRoivant Sciences Ltd.13D/A19.50%29.9M shares−1.00 ppfrom 20.50%Oct 1, 2026SEC
Sep 4, 20266:32 PM ETWhitefort Capital Management, LPand 5 others13G8.00%15.8M shares0.00 ppfrom 8.00%Sep 4, 2026SEC
Aug 12, 20263:02 PM ETMorgan Stanleyand 1 other13G/A8.80%17.4M shares−4.70 ppfrom 13.50%Jun 30, 2026SEC
May 15, 20265:29 PM ETTwo Seas Capital LPand 2 others13G/A9.40%18.6M shares+2.90 ppfrom 6.50%Mar 31, 2026SEC
Apr 28, 20265:54 PM ETWhitefort Capital Management, LPand 5 others13D/A8.00%15.8M shares−0.10 ppfrom 8.10%Apr 24, 2026SEC
Apr 13, 20267:56 PM ETWhitefort Capital Management, LPand 5 others13D/A8.10%15.8M shares+1.10 ppfrom 7.00%Apr 10, 2026SEC
Feb 17, 20264:21 PM ETTwo Seas Capital LPand 2 others13G/A6.50%12.6M shares+1.10 ppfrom 5.40%Dec 31, 2025SEC
Feb 11, 20261:45 PM ETMorgan Stanleyand 1 other13G/A13.50%25.9M shares+2.10 ppfrom 11.40%Dec 31, 2025SEC
Aug 13, 20255:40 PM ETTwo Seas Capital LPand 2 others13G5.40%10.4M shares–Jun 30, 2025SEC
Feb 25, 20257:19 AM ETRoivant Sciences Ltd.13D/A20.50%38.8M shares0.00 ppfrom 20.50%Feb 21, 2025SEC
Feb 21, 20259:00 AM ETWhitefort Capital Management, LPand 5 others13D/A7.00%13.3M shares–Feb 20, 2025SEC
Feb 18, 20255:21 PM ETRoivant Sciences Ltd.13D/A20.50%38.8M shares–Feb 18, 2025SEC
Feb 3, 20253:26 PM ETMorgan Stanleyand 1 other13G/A11.40%21.5M shares–Dec 31, 2024SEC
Nov 14, 2024Two Seas Capital LP13G/AOld format–––SEC
Jun 10, 2024Morgan Stanley13GOld format–––SEC
May 17, 2024Whitefort Capital Management, LP13D/AOld format–––SEC
May 9, 2024Whitefort Capital Management, LP13DOld format–––SEC
Feb 14, 2024Two Seas Capital LP13G/AOld format–––SEC
Feb 14, 2024Whitefort Capital Management, LP13G/AOld format–––SEC
Feb 12, 20249:41 AM ETBlackRock Inc.13G/AOld format–––SEC
Nov 21, 2023Two Seas Capital LP13GOld format–New–SEC
Sep 11, 2023Whitefort Capital Management, LP13GOld format–New–SEC
Feb 3, 202312:10 PM ETBlackRock Inc.13GOld format–New–SEC
Feb 14, 2022RTW Investments, LP13G/AOld format–––SEC
Oct 20, 2021Roivant Sciences Ltd.13D/AOld format–––SEC
Feb 16, 2021Foresite Capital Fund IV, L.P.13G/AOld format–––SEC
Feb 12, 2021RTW Investments, LP13G/AOld format–––SEC
Feb 10, 2021Morgan Stanley13G/AOld format–––SEC

Form 144: proposed insider sales

11 notices from officers, directors and other affiliates planning to sell Arbutus Biopharma Corp shares, newest first.

Form 144 notices for ABUS
Filed (ET)SellerShares to sellMarket valuePlanned saleBrokerFiling
Apr 21, 20252:11 PM ETMcElhaugh Michael J.Director246.9K$804.9KApr 21, 2025Rockefeller Capital ManagementSEC
Apr 15, 20254:27 PM ETMcElhaugh Michael J.Director53.1K$170.1KApr 15, 2025Rockefeller Capital ManagementSEC
Mar 31, 20259:42 AM ETSofia Michael J.Officer250.0K$875.0KMar 31, 2025Fidelity Brokerage Services LLCSEC
Mar 24, 20259:19 AM ETSofia Michael J.Officer250.0K$820.0KMar 24, 2025Fidelity Brokerage Services LLCSEC
Mar 19, 20259:34 AM ETSofia Michael J.Officer150.0K$480.0KMar 19, 2025Fidelity Brokerage Services LLCSEC
Mar 13, 20253:55 PM ETSofia Michael J.Officer100.0K$338.0KMar 13, 2025Fidelity Brokerage Services LLCSEC
Mar 7, 20252:59 PM ETSofia Michael J.Family member of an insider167.2K$550.0KMar 7, 2025Fidelity Brokerage Services LLCSEC
Feb 4, 20258:39 PM ETDavid C. HastingsOfficer22.2K$72.8KFeb 4, 202510b5-1Morgan Stanley Wealth Management CanadaSEC
Feb 4, 20258:38 PM ETKaren SimsOfficer19.3K$63.5KFeb 4, 202510b5-1Morgan Stanley Wealth Management CanadaSEC
Feb 4, 20258:36 PM ETMichael J. McElhaughDirector and Officer23.8K$78.1KFeb 4, 202510b5-1Morgan Stanley Wealth Management CanadaSEC
Feb 4, 20258:34 PM ETJ. Christopher NaftzgerOfficer11.3K$37.2KFeb 4, 202510b5-1Morgan Stanley Wealth Management CanadaSEC