---
schema_version: "secwatch.filing_event.v1"
accession: "0001171843-23-006796"
form_type: "8-K"
ticker: "ABUS"
cik: "0001447028"
company_name: "Arbutus Biopharma Corp"
filed_at: "2023-11-07T23:59:59+00:00"
generated_at: "2026-06-08T14:35:05.627368+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Arbutus cuts workforce 24%, extends cash runway to Q1 2026; CEO to retire

## Summary
- Workforce reduced by 24% affecting research; one-time charge ~$1.1M in Q4 2023.
- Cash, cash equivalents & investments $144.7M as of Sep 30; cash runway extended into Q1 2026.
- Net loss $20.1M ($0.12 per share) for Q3 2023 vs. $17.6M loss in Q3 2022.
- CEO William Collier to retire at end of 2023; COO Michael McElhaugh to serve as interim CEO.
- Preliminary Phase 2a data for imdusiran + VTP-300 at AASLD; AB-101 Phase 1a/1b dosing continues.

## SEC filing metadata
- accession: 0001171843-23-006796
- form_type: 8-K
- ticker: ABUS
- cik: 0001447028
- company_name: Arbutus Biopharma Corp
- filed_at: 2023-11-07T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1447028/000117184323006796/0001171843-23-006796-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1447028/000117184323006796/f8k_110623.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001171843-23-006796
- JSON: https://secwatch.observer/filing/0001171843-23-006796.json
- Plain text: https://secwatch.observer/filing/0001171843-23-006796.txt

## Key facts
- Earnings Releases
  Arbutus Biopharma Corp reported financial results for the third quarter ended September 30, 2023.
  - Period: the third quarter ended September 30, 2023
  - Result: reported results
  source text: On November 7, 2023, Arbutus Biopharma Corporation (the “Company”) issued a press release announcing its financial results for the third quarter ended September 30, 2023
  evidence_url: https://www.sec.gov/Archives/edgar/data/1447028/000117184323006796/0001171843-23-006796-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.