# EDGAR Filing Document

**Accession Number:** 0001447028
**File Stem:** 0001171843-26-001299
**Filing Date:** 2026-3
**Character Count:** 20410
**Document Hash:** 51fab7042028a5376feee6cc8d4f832d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001171843-26-001299.hdr.sgml**: 20260303

**ACCESSION NUMBER**: 0001171843-26-001299

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 14

**CONFORMED PERIOD OF REPORT**: 20260303

**ITEM INFORMATION**: Entry into a Material Definitive Agreement

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260303

**DATE AS OF CHANGE**: 20260303

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Arbutus Biopharma Corp
- **CENTRAL INDEX KEY:** 0001447028
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 980597776
- **STATE OF INCORPORATION:** A1
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-34949
- **FILM NUMBER:** 26714411

**BUSINESS ADDRESS:**
- **STREET 1:** 701 VETERANS CIRCLE
- **CITY:** WARMINSTER
- **STATE:** PA
- **ZIP:** 18974
- **BUSINESS PHONE:** 604-419-3200

**MAIL ADDRESS:**
- **STREET 1:** 701 VETERANS CIRCLE
- **CITY:** WARMINSTER
- **STATE:** PA
- **ZIP:** 18974

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** TEKMIRA PHARMACEUTICALS Corp
- **DATE OF NAME CHANGE:** 20110607

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** TEKMIRA PHARMACEUTICALS CORP
- **DATE OF NAME CHANGE:** 20081003

?xml version='1.0' encoding='ASCII'? Form 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

### Washington, D.C. 20549
_________________

### FORM 8-K
_________________

#### CURRENT REPORT

#### Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

#### Date of Report (Date of earliest event reported): March 3, 2026
_______________________________

#### Arbutus Biopharma Corporation
(Exact name of registrant as specified in its charter)

_______________________________

---

| | | |
|:---|:---|:---|
| **British Columbia, Canada** | **001-34949** | **98-0597776** |
| (State or Other Jurisdiction of Incorporation) | (Commission File Number) | (I.R.S. Employer Identification No.) |

---

#### 701 Veterans Circle

#### Warminster, Pennsylvania 18974
(Address of Principal Executive Offices) (Zip Code)

(267) 469-0914

(Registrant's telephone number, including area code)

(Former name or former address, if changed since last report)

_______________________________

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered |
| Common Shares, without par value | ABUS | The Nasdaq Stock Market LLC |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

**Item 1.01. Entry into a Material Definitive Agreement.**

On March 3, 2026 (the "Effective Date"), Arbutus Biopharma Corporation ("Arbutus" or the "Company"), Genevant Sciences GmbH ("Genevant" and together with Arbutus, "Arbutus/Genevant"), and, solely for certain purposes, Genevant Sciences Ltd., and Moderna, Inc. and ModernaTx, Inc. (together, "Moderna") entered into a settlement agreement (the "Settlement Agreement") to resolve all patent infringement litigation between Arbutus/Genevant and Moderna pending in the U.S. and internationally relating to Moderna's unauthorized use of Arbutus/Genevant's lipid nanoparticle ("LNP") delivery technology in its vaccines, including Spikevax® (the "LNP Litigation"). The Settlement Agreement requires each of Arbutus/Genevant and Moderna to file stipulated judgments and stipulations of dismissal for the respective courts or tribunals to enter judgment or dismiss with prejudice or withdraw (as the case may be) all claims in the LNP Litigation. Moderna may appeal from the stipulated judgments solely with respect to whether 28 U.S.C. §1498 ("§ 1498") bars Arbutus/Genevant's claims for direct infringement and indirect infringement against Moderna for vaccine doses that were sold to the United States Government under a particular contract and characterized by the U.S. District Court for the District of Delaware as "vaccines that did not go directly to United States Government employees."

Under the terms of the settlement, Moderna will make a $950.0 million noncontingent lump sum payment to Arbutus/Genevant on or before July 8, 2026.

In addition, as described in more detail in, and subject to the terms of, the Settlement Agreement, Moderna will make an additional $1.3 billion contingent lump sum payment to Arbutus/Genevant (i) if the Court of Appeals for the Federal Circuit (whether by the initial panel, upon panel rehearing or *en banc*) affirms, or if there is a final non-appealable judgment that affirms, the rejection of Moderna's affirmative defense pursuant to § 1498 by the District Court in its entirety or otherwise holds that § 1498 does not bar Arbutus/Genevant's claim against Moderna as to either or both of direct infringement and indirect infringement with respect to all of the doses subject to Moderna's appeal, or (ii) upon a failure to timely file, or voluntary dismissal of, Moderna's appeal (any of the foregoing under (i) or (ii), a "Arbutus/Genevant § 1498 Victory"). If the appellate court instead determines that § 1498 bars Arbutus/Genevant's infringement claims as to some, but not all, of the doses subject to Moderna's appeal, the Settlement Agreement provides that Moderna will pay Arbutus/Genevant a prorated amount of $1.3 billion, calculated based on the number of doses for which § 1498 bars Arbutus/Genevant's infringement claims as clearly articulated by the Federal Circuit, or if not clearly articulated by the Federal Circuit, as mutually agreed by the parties or determined in an accelerated binding arbitration process. Any payment from Moderna to Arbutus/Genevant as described in this paragraph is referred to herein as the "Contingent Payment."

Under certain circumstances, as described in more detail in, and subject to the terms of, the Settlement Agreement, if the Arbutus/Genevant § 1498 Victory is subsequently overturned in Moderna's favor in a final nonappealable decision, Arbutus/Genevant is required to return the Contingent Payment to Moderna, plus interest. If, following a Arbutus/Genevant § 1498 Victory, either (i) Moderna does not timely appeal such Arbutus/Genevant § 1498 Victory or (ii) such Arbutus/Genevant § 1498 Victory is subsequently affirmed in a final nonappealable decision, Moderna will have no further right to a potential repayment of the Contingent Payment.

The Settlement Agreement includes mutual financial covenants to ensure payment or repayment of the Contingent Payment, as described above.

The Settlement Agreement also contains customary mutual releases in favor of each of Arbutus/Genevant and Moderna in respect of the LNP Litigation. In addition, the Settlement Agreement includes a fully paid-up, royalty free, irrevocable, non-exclusive, worldwide license and covenant not to sue granted by Arbutus/Genevant to Moderna under any patents and patent applications owned or licensable by Arbutus/Genevant or their respective direct and indirect wholly owned subsidiaries to make, sell and generally otherwise exploit Moderna's SPIKEVAX, mNEXSPIKE and mRESVIA vaccines and any other mRNA vaccines that include a lipid SM-102-based LNP formulation against an infectious disease and meet certain conditions, as well as a covenant not to sue with respect to certain other Arbutus/Genevant patents and Moderna products.

As previously disclosed, under the Company's license with Genevant, the Company is entitled to receive, after deduction of litigation costs, 20% of the proceeds received by Arbutus/Genevant pursuant to the Settlement Agreement or, if less, tiered low single-digit royalties on net sales of the infringing product (including the proceeds from the Settlement Agreement, which will be treated as net sales). The foregoing description of the Settlement Agreement does not purport to be complete and is subject to, and qualified in its entirety by reference to, the full text of such agreement, a copy of which will be filed as an exhibit to the Company's Annual Report on Form 10-K for the fiscal year ending on December 31, 2025 (or earlier filing with the U.S. Securities and Exchange Commission).

**Item 8.01. Other Events.**

On March 3, 2026, Arbutus/Genevant issued a press release announcing entry into the Settlement Agreement. A copy of the press release is filed herewith as Exhibit 99.1 and is incorporated by reference herein.

**Item 9.01. Financial Statements and Exhibits.**

**(d) Exhibits.**

---

| | |
|:---|:---|
| **<u>Exhibit Number</u>** | **<u>Description</u>** |
| [99.1](exh_991.htm) | [Press Release, dated March 3, 2026](exh_991.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

---

#### SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | **Arbutus Biopharma Corporation** | **Arbutus Biopharma Corporation** |
| Date: March 3, 2026 | By: | <u>/s/ Tuan Nguyen&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u> |
|  |  | Tuan Nguyen |
|  |  | Chief Financial Officer |

---

## Exhibit 99.1

**EXHIBIT 99.1**

**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. (Nasdaq: ROIV), and Arbutus Biopharma Corporation (Nasdaq: ABUS), a clinical-stage biopharmaceutical company focused on infectious disease, today announced that they have entered into a $2.25 billion global settlement with Moderna, Inc. to resolve all U.S. and international enforcement actions involving Moderna's unauthorized use of Genevant's and Arbutus' LNP delivery technology in its COVID-19 vaccines, including Spikevax<sup>**®**</sup>.

As part of the settlement, Moderna will pay Genevant and Arbutus $950 million upfront in July 2026 and an additional $1.3 billion contingent upon an appellate ruling that 28 U.S.C. § 1498 (Section 1498) does not bar Genevant's and Arbutus' claims against Moderna for patent infringement, except as to doses characterized by the district court as having gone to U.S. government employees. In asserting that defense, Moderna argued that Section 1498 applies such that U.S. taxpayers should assume liability for its infringement of Genevant's and Arbutus' patents for sales made under one of its government contracts. Moderna has also consented to entry of a judgment of infringement and of no invalidity of four Genevant/Arbutus patents. Additionally, as a part of this settlement, Genevant has agreed to grant Moderna a global non-exclusive license to LNP delivery technology for infectious disease applications and a covenant not to sue for certain Genevant/Arbutus patents and Moderna products. For more information about the terms and conditions of the settlement with Moderna, including the contingent payment, please refer to Arbutus' Current Report on Form 8-K filed with the SEC on March 3, 2026.

"We are pleased with this settlement, which allows us to put this lengthy dispute behind us and remain focused on our mission to leverage our world-class nucleic acid delivery systems to bring innovative medicines to people who need them," said James Heyes, CEO of Genevant Sciences. "At the same time, it is enormously gratifying for the Genevant team to, at long last, be recognized for our pivotal contribution to restoring normalcy around the world in the face of a once-in-a-lifetime pandemic."

"Nobel laureates, industry executives, and prominent researchers have long recognized that Arbutus scientists changed the drug development landscape when they invented LNP delivery technology, enabling nucleic acids including mRNA to be used for medicines and opening a new world of possibilities," said Lindsay Androski, President and Chief Executive Officer of Arbutus. "Today, Moderna has finally acknowledged the same. This is a transformative outcome for Arbutus as a company, but more importantly, it is a long-overdue recognition that the COVID-19 vaccines would never have made it to the world without the seminal work of Ian MacLachlan, Ed Yaworski, Lloyd Jeffs, Kieu Lam, Lorne Palmer, and Cory Giesbrecht. Today, above all else, we celebrate – and in the case of Cory, remember – them."

**Investor Conference Call Information**

Roivant will host a live conference call and webcast at 4:45 p.m. ET on Tuesday, March 3, 2026, to discuss Genevant's and Arbutus' $2.25 billion global settlement with Moderna. To access the conference call by phone, please register online using this registration link. The presentation and webcast details will also be available under "Events & Presentations" in the Investors section of the Roivant website at https://investor.roivant.com/news-events/events. The archived webcast will be available on Roivant's website after the conference call.

**About Genevant Sciences**

Genevant Sciences, a subsidiary of Roivant, is a leading nucleic acid delivery company with world-class platforms, a robust lipid nanoparticle (LNP) patent portfolio, and decades of experience and expertise in nucleic acid drug delivery and development. Genevant's scientists have pioneered LNP delivery of nucleic acids for over 20 years, and Genevant's LNP platform, which has been studied across more than a dozen discrete product candidates and is the delivery technology behind the first and only approved systemic RNA-LNP product (patisiran), enables a wide array of RNA-based applications, including vaccines, therapeutic protein production, and gene editing. For more information, please visit www.genevant.com.

**About Arbutus**

Arbutus Biopharma Corporation (Nasdaq: ABUS) is a clinical-stage biopharmaceutical company focused on infectious disease. The company is currently developing imdusiran (AB-729) and an oral PD-L1 inhibitor (AB-101) for the treatment of chronic hepatitis B (cHBV) infection. Arbutus is also consulting closely with and supporting its exclusive licensee, Genevant Sciences, to protect and defend its intellectual property, which is the subject of an on-going lawsuit against Pfizer/BioNTech for use of Arbutus' patented LNP technology in their COVID-19 vaccines. For more information, visit <u>www.arbutusbio.com</u>.

**About Roivant** 

Roivant (Nasdaq: ROIV) is a biopharmaceutical company that aims to improve the lives of patients by accelerating the development and commercialization of medicines that matter. Roivant's pipeline includes brepocitinib, a potent small molecule inhibitor of TYK2 and JAK1 in development for the treatment of dermatomyositis, non-infectious uveitis and cutaneous sarcoidosis; IMVT-1402 and batoclimab, fully human monoclonal antibodies targeting FcRn in development across several IgG-mediated autoimmune indications; and mosliciguat, an inhaled sGC activator in development for pulmonary hypertension associated with interstitial lung disease. We advance our pipeline by creating nimble subsidiaries or "Vants" to develop and commercialize our medicines and technologies. Beyond therapeutics, Roivant also incubates discovery-stage companies and health technology startups complementary to its biopharmaceutical business. For more information, visit www.roivant.com.

**Forward-Looking Statements and Information**

This press release contains forward-looking statements within the meaning of the Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, and forward-looking information within the meaning of Canadian securities laws (collectively, forward-looking statements). Forward-looking statements in this press release include, but are not limited to, statements about Arbutus' plans with respect to ongoing patent litigation matters, including the expected timing thereof and the settlement of the Moderna litigation, and Arbutus' evaluation of a potential return of capital to its shareholders.

With respect to the forward-looking statements contained in this press release, Arbutus has made numerous assumptions regarding, among other things, the stability of economic and market conditions. While Arbutus considers these assumptions to be reasonable, these assumptions are inherently subject to significant business, economic, competitive, market and social uncertainties and contingencies. Additionally, there are known and unknown risk factors which could cause Arbutus' actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements contained herein. Known risk factors include, among others: uncertainties associated with litigation generally and patent litigation specifically; economic and market conditions may worsen; and risks related to the sufficiency of Arbutus' cash resources for its foreseeable and unforeseeable operating expenses and capital expenditures.

A more complete discussion of the risks and uncertainties facing Arbutus appears in Arbutus' Annual Report on Form 10-K, Arbutus' Quarterly Reports on Form 10-Q and Arbutus' continuous and periodic disclosure filings, which are available at www.sedar.com and at www.sec.gov. All forward-looking statements herein are qualified in their entirety by this cautionary statement, and Arbutus disclaims any obligation to revise or update any such forward-looking statements or to publicly announce the result of any revisions to any of the forward-looking statements contained herein to reflect future results, events or developments, except as required by law.

Arbutus Biopharma Corporation

ir@arbutusbio.com