What does CUSIP 03879J100 represent in this 13F holders report?

CUSIP 03879J100 is the security identifier for ABUS - Arbutus Biopharma Corp - Common Shares used to aggregate holder disclosures.

How many institutions held ABUS - Arbutus Biopharma Corp - Common Shares in Q1 2026?

166 institutional investors reported ABUS - Arbutus Biopharma Corp - Common Shares for Q1 2026. Use the holders table for investor-level position and value details.

Arbutus Biopharma Corp - Common Shares (ABUS)

CUSIP: 03879J100

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Common Shares
Total 13F shares: 138,984,840
Total 13F value: $625,429,886
Share change: +16,930,355
Put/Call ratio: 109%
SEC-reported price per share: $4.50
Number of holders: 166
Value change: +$75,356,451
Number of buys: 70
Number of sells: 78
Shares outstanding: 197,584,068

Security key

03879J100

Report period

Q1 2026

Institutions

166

Top holders

ABUS full security history Ownership snapshot Full 13F holder table Arbutus Biopharma Corp SEC filings Arbutus Biopharma Corp company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Ownership snapshot

Top reported holders of ABUS - Arbutus Biopharma Corp - Common Shares (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Roivant Sciences Ltd.

Disclosed value leader

MORGAN STANLEY

Comparable rows

15/15

Latest evidence

31 Mar 2026

13D/G 3/4/5 13F Lead comparable stake: 20% 13D/G row: Roivant Sciences Ltd. Showing 1-6 of 15 holder rows.

Quick read

Roivant Sciences Ltd. leads the comparable SEC ownership view at 20%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Roivant Sciences Ltd.'s linked filing trail.

Comparable ownership Top 5

Roivant Sciences Ltd. 20%

Two Seas Capital LP 9.4%

MORGAN STANLEY 14%

Whitefort Capital Management, LP 6.8%

BlackRock, Inc. 6.6%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Roivant Sciences Ltd.	13D/G 3/4/5 10%+ Owner 13D/G 3/4/5	20%	$127,808,150 38,847,462 shares	$0	21 Feb 2025
Two Seas Capital LP	13D/G 13F Company 13D/G 13F	9.4%	$79,797,435 18,557,543 shares	+$25,664,056	31 Mar 2026
MORGAN STANLEY	13F Company 13F	14%	$128,440,353 26,702,776 shares	—	31 Dec 2025
Whitefort Capital Management, LP	13F Company 13F	6.8%	$64,180,927 13,343,228 shares	—	31 Dec 2025
BlackRock, Inc.	13F Company 13F	6.6%	$62,784,261 13,052,861 shares	—	31 Dec 2025
VANGUARD GROUP INC	13F Company 13F	4.7%	$44,456,122 9,242,437 shares	—	31 Dec 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

166

138,984,840

Rows available

166

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q1 2026 Across Filers

Q1 2026 holders

166

Q1 2026 holders

166

Holder diff

Investor	Q1 2026 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q1 2026 value	Value change	Value Chg %