# EDGAR Filing Document

**Accession Number:** 0001447028
**File Stem:** 0001140361-26-014624
**Filing Date:** 2026-4
**Character Count:** 2323
**Document Hash:** 0c264fb98f7616d725272c657fb0ea59
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-014624.hdr.sgml**: 20260414

**ACCESSION NUMBER**: 0001140361-26-014624

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260414

**DATE AS OF CHANGE**: 20260414

**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:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-34949
- **FILM NUMBER:** 26861536

**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

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### <br>

### SCHEDULE 14A

### <br>

#### Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

#### <br>

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| | |
|:---|:---|
| Filed by the Registrant ☒ | Filed by a Party other than the Registrant ☐ |

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Check the appropriate box:

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| | |
|:---|:---|
| ☐ | Preliminary Proxy Statement |
| ☐ | **Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))** |
| ☐ | Definitive Proxy Statement |
| ☒ | Definitive Additional Materials |
| ☐ | Soliciting Material under §240.14a-12 |
|  | **ARBUTUS BIOPHARMA CORPORATION**<br> **(Name of Registrant as Specified in its Charter)** |
|  | **(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)** |

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Payment of Filing Fee (Check all boxes that apply):

☒ No fee required <br> ☐ Fee paid previously with preliminary materials <br> ☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

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