Arbutus Commences US$230 Million Modified “Dutch Auction” Tender Offer of its Common Shares at a Price Not Greater Than US$5.75 Nor Less Than US$5.00 Per Share

WARMINSTER, Pa., Aug. 24, 2026 (GLOBE NEWSWIRE) -- Arbutus Biopharma Corporation (Nasdaq: ABUS) (“Arbutus” or the “Company”), a clinical-stage biopharmaceutical company focused on infectious disease, today announced the commencement of a modified “Dutch Auction” tender offer to purchase for cancellation up to US$230 million in value of its common shares (the “Shares”) at a price of not less than US$5.00 and not more than US $5.75 per Share, less any applicable withholding taxes and without interest, on the terms and subject to the conditions described in the offer to purchase and accompanying issuer bid circular, dated August 24, 2026 (the “Offer to Purchase and Bid Circular”), the Letter of Transmittal (the “Letter of Transmittal”) and Notice of Guaranteed Delivery (the “Notice of Guaranteed Delivery”) (which together, as they may be amended and supplemented from time to time, constitute the “Offer”).

GlobeNewsWire • Aug 24, 2026

Arbutus Announces Intent to Repurchase Up to US$230 Million of its Common Shares Through Modified “Dutch Auction” Tender Offer

WARMINSTER, Pa., Aug. 21, 2026 (GLOBE NEWSWIRE) -- Arbutus Biopharma Corporation (Nasdaq: ABUS) (“Arbutus” or the “Company”), a clinical-stage biopharmaceutical company focused on infectious disease, today announced plans to commence a modified “Dutch Auction” tender offer (the “Offer”) to repurchase up to US$230 million of its common shares at a purchase price of not less than US$5.00 per share and not more than US$5.75 per share, in cash, less any applicable withholding taxes and without interest. The Offer is expected to commence on or about August 24, 2026 and, unless extended or terminated by the Company, expire on or about September 29, 2026. The Offer is expected to be funded through the Company's cash on hand.

GlobeNewsWire • Aug 21, 2026

Arbutus Reports Second Quarter 2026 Financial Results and Provides Corporate Update

Maintained strong financial position with cash, cash equivalents and marketable securities of $92.6M as of June 30, 2026

GlobeNewsWire • Aug 12, 2026

Arbutus Initiates International Patent Infringement Enforcement Actions Against Pfizer and BioNTech, Receives First Payment From Moderna Settlement Agreement and Announces Intent to Return Capital to Shareholders

Arbutus and its exclusive licensee, Genevant, filed three international lawsuits seeking to enforce patents protecting their innovative lipid nanoparticle (“LNP”) technology against Pfizer and BioNTech

GlobeNewsWire • Jul 16, 2026

Arbutus Biopharma: Moderna Validates My IP Bull Case

Arbutus Biopharma is now much better capitalized after Moderna validated the value of its LNP patents. As for ABUS' in-house assets, I think Imdusiran has shown durable viral control. The main caveat is that it comes from combo therapies. Their balance sheet gives them a comfortable runway to pursue imdusiran's upcoming Phase 2b trial, which is yet another optionality vertical for the stock.

Seeking Alpha • Jul 13, 2026

Arbutus Reports First Quarter 2026 Financial Results and Provides Corporate Update

Q1 total revenue of $179.1M includes estimated license revenue from Genevant related to litigation settlement with Moderna

GlobeNewsWire • May 13, 2026

Arbutus Receives U.S. FDA Fast Track Designation for Imdusiran for the Treatment of Chronic Hepatitis B

Fast Track designation has the potential to facilitate development and accelerate FDA review of imdusiran WARMINSTER, Pa., April 15, 2026 (GLOBE NEWSWIRE) -- Arbutus Biopharma Corporation (Nasdaq: ABUS) (“Arbutus” or the “Company”), a clinical-stage biopharmaceutical company focused on infectious disease, today announced that the U.S. Food and Drug Administration (“FDA”) has granted Fast Track designation for imdusiran for the treatment of chronic hepatitis B (“cHBV”).

GlobeNewsWire • Apr 15, 2026

Arbutus Reports Fourth Quarter and Year End 2025 Financial Results and Provides Corporate Update

Strong financial position with cash, cash equivalents and marketable securities of $91.5M as of December 2025

GlobeNewsWire • Mar 23, 2026

Moderna agrees to pay up to $2.25 billion to settle COVID vaccine patent dispute

Moderna has agreed to ​pay Genevant Sciences, ‌a subsidiary of Roivant Sciences , and ​Arbutus Biopharma ​up to $2.25 billion to ⁠settle a ​long-running legal fight ​over the technology that made its COVID-19 ​vaccine possible, ​the companies said on Tuesday.

Reuters • Mar 3, 2026

Genevant Sciences and Arbutus Biopharma Announce $2.25 Billion Global Settlement With Moderna

Moderna to pay Genevant and Arbutus $950 million upfront and an additional $1.3 billion contingent upon a favorable resolution of Moderna's Section 1498 appeal If the $1.3 billion payment is realized, this settlement will be the largest disclosed patent settlement paid in the pharmaceutical industry and the second largest in any industry Settlement holds Moderna accountable for infringement and provides for the court to enter judgment of no invalidity on the four Genevant/Arbutus patents asserted in the case Genevant grants Moderna a global non-exclusive license to its LNP delivery technology for SM-102-containing mRNA vaccines for infectious disease and a covenant not to sue for certain Genevant/Arbutus patents and Moderna products, ending all patent-infringement litigation against Moderna arising from its unauthorized use of the technology in its COVID-19 vaccines Pfizer/BioNTech litigation is ongoing in the United States following a favorable Markman ruling issued in September 2025; Comirnaty sales represent ~2/3 of global COVID-mRNA vaccine sales to date Arbutus announces that it is currently evaluating a return of capital to shareholders for the third quarter of calendar year 2026, in conjunction with the upfront payment Roivant will host an investor call to discuss these updates today, March 3, 2026, at 4:45 p.m. ET BASEL, Switzerland and VANCOUVER, British Columbia, March 03, 2026 (GLOBE NEWSWIRE) -- Genevant Sciences, a leading nucleic acid delivery company with world-class platforms and a robust lipid nanoparticle (LNP) patent portfolio and a subsidiary of Roivant Sciences Ltd.

GlobeNewsWire • Mar 3, 2026