SCHEDULE Filed 2025-02-21 Event 2025-02-20 SEC 0000921895-25-000560 →

Whitefort Capital Management, LP → Arbutus Biopharma Corp ABUS

Stake: 7.00% Shares: 13,307,967 CUSIP: 03879J100 Class: Common Shares, without par value

Item 4 — Purpose of Transaction

Item 4 is hereby amended to add the following: The Reporting Persons intend to engage in communications with the Issuer, its shareholders and other market participants regarding opportunities to drive shareholder value, including through potential changes to the composition of the Issuer's Board of Directors.

Cross-References

Insider Activity (last 365d)

0 transactions

0 buys · 0 sales · 0 awards/exercises

Issuer Cluster

25 13D/G filings on this issuer

24 other filings besides this one

Filer Track Record

3 filings by this filer

2 other filings in the data moat

Short Interest · settle 2026-07-15

DTC 7.40

19,653,287 shares short · +14.8% vs prior

Post-Filing Returns · since 2025-02-20 on ABUS

+1 day

-0.6%

+5 days

+0.3%

+30 days

-1.5%

+60 days

-6.7%

+90 days

-7.8%

+180 days

+1.5%

Anchor price 3.44 on closest trading day on/after 2025-02-20. Source: Yahoo Finance daily adj_close (split + dividend adjusted).

Other 13D/G Filings on Arbutus Biopharma Corp

Filed	Form	Filer	Stake	Shares
2026-04-28	SCHEDULE 13D/A	Whitefort Capital Management, LP	—	15,794,261	view →
2026-04-13	SCHEDULE 13D/A	Whitefort Capital Management, LP	8.10%	15,794,261	view →
2025-02-25	SCHEDULE	Roivant Sciences Ltd.	20.50%	38,847,462	view →
2025-02-18	SCHEDULE	Roivant Sciences Ltd.	20.50%	38,847,462	view →
2021-10-20	SC	Roivant Sciences Ltd.	—	—	view →
2019-07-17	SC	Machado Patrick	—	—	view →
2019-07-17	SC	Lo Andrew	—	—	view →
2019-07-16	SC	Roivant Sciences Ltd.	—	—	view →
2019-07-12	SC	VIKING GLOBAL INVESTORS LP	—	—	view →
2019-07-12	SC	QVT Financial LP	—	—	view →
2019-07-12	SC	Dexxon Holdings Ltd.	—	—	view →
2019-07-12	SC	SVF Investments (UK) Ltd	—	—	view →
2019-01-03	SC	VIKING GLOBAL INVESTORS LP	—	—	view →
2018-04-23	SC	Roivant Sciences Ltd.	—	—	view →
2018-04-12	SC	Roivant Sciences Ltd.	—	—	view →
2018-03-16	SC	Roivant Sciences Ltd.	—	—	view →
2018-02-14	SC	Roivant Sciences Ltd.	—	—	view →
2018-01-16	SC	Machado Patrick	—	—	view →
2018-01-16	SC	QVT Financial LP	—	—	view →
2018-01-16	SC	VIKING GLOBAL INVESTORS LP	—	—	view →

Showing 20 of 24

Other Filings by Whitefort Capital Management, LP

Filed	Form	Issuer	Stake	Shares
2026-04-28	SCHEDULE 13D/A	Arbutus Biopharma Corp ABUS	—	15,794,261	view →
2026-04-13	SCHEDULE 13D/A	Arbutus Biopharma Corp ABUS	8.10%	15,794,261	view →

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