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SC 13D/A ·Filed Oct 5, 2026

ABUS

Arbutus Biopharma Corp
NEUTRAL
Impact 4/10
Horizonweeks Processed20d 21h ago SEC0001140361-26-038693
Activist stake amendment (position change)
Actionable Insight • Neutral

Roivant maintained its 19.5% stake by proportionately tendering, signaling no change in its long-term commitment to Arbutus. Monitor for any future strategic initiatives or board representation discussions given Roivant's significant ownership.

DirectionNeutral
Confidencehigh
Horizonweeks
Latest settled — T+5d
ABUS ▼ -8.26% at T+5d
NEUTRAL call -8.26% · α vs SPY -8.12% · entry $4.48 → $4.11
Next anchor: T+20d in 7d
Latest observation: T+13 -5.17% FF3 residual α
Entry = T+0 close
Oct 5, 2026
via day close
T+1d
-4.24%
call -4.24% · α -4.00%
$4.29
settled 20d ago
T+5d
-8.26%
call -8.26% · α -8.12%
$4.11
settled 14d ago
T+20d
Pending
in 7d
T+60d
Pending
in 2mo

Price Chart

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Executive Summary

Roivant Sciences Ltd. filed Amendment No. 14 to its Schedule 13D on Arbutus Biopharma Corp, reporting beneficial ownership of 29,880,079 common shares (19.5%) following a proportionate tender in Arbutus's modified Dutch auction tender offer. Roivant tendered 8,967,383 shares at $5.00 per share for aggregate consideration of approximately $44.8 million, maintaining its proportional ownership after the company repurchased 46 million shares for $230 million.

Key Financial Metrics

Stake
19.5%
Investor
Roivant Sciences Ltd.

Key Facts

  • Roivant beneficially owns 29,880,079 common shares, or approximately 19.5% of Arbutus's outstanding shares.
  • Arbutus completed a modified Dutch auction tender offer to purchase up to $230 million of its common shares at $5.00-$5.75 per share.
  • The offer expired on September 29, 2026; Arbutus accepted 46,000,000 shares at $5.00 per share.
  • Roivant made a proportionate tender of 8,967,383 shares, receiving approximately $44.8 million in proceeds.
  • Roivant's ownership percentage remained unchanged at 19.5% after the tender offer.
  • No new activist demands or changes in purpose were disclosed in this amendment.

Financial Impact

Roivant received approximately $44.8 million from tendering 8,967,383 shares at $5.00 per share in Arbutus's $230 million tender offer.

ownership percentagecash proceeds

Risk Factors

  • Roivant's large stake (19.5%) could lead to future activist pressure or strategic demands.
  • The tender offer reduced Arbutus's share count by 46 million shares, potentially increasing earnings per share but also reducing cash reserves by $230 million.

Investment Themes

Documents Analyzed

This report is based on 4 SEC documents filed with EDGAR.

DocumentAccession Number
SC 13D/A Filing (Primary)0001140361-26-038693
Document: 0001140361-26-038693-index-headers.html0001140361-26-038693
Document: 0001140361-26-038693-index.html0001140361-26-038693
Document: 0001140361-26-038693.txt0001140361-26-038693
18 reports for ABUS
Performance horizon
80% Hit rate @ T+60 4 of 5 directional calls Went positive at some point 6 of 13 best @ T+20▲ +11.55%Aug 12, 2026
Filters
Rows
Reports for ABUS — sortable, filterable
TypeNow
Oct 22, 2026
4d ago
8-K
BULLISH ★ 6/10
$4.21awaiting T+60—$4.20 (−0.24%)
Oct 22, 2026
4d ago
Press Release
BULLISH ★ 7/10
$4.21awaiting T+60—$4.20 (−0.24%)
Oct 7, 2026
19d ago
SC 13G/A
NEUTRAL ★ 3/10
$4.18awaiting T+60—$4.20 (+0.48%)
Oct 5, 2026
20d ago
SC 13D/A
NEUTRAL ★ 4/10
$4.48awaiting T+60—$4.20 (−6.25%)
Oct 1, 2026
25d ago
SC TO-I/A
BULLISH ★ 6/10
$4.56awaiting T+60—$4.20 (−7.89%)
Oct 1, 2026
25d ago
Press Release
BULLISH ★ 7/10
$4.56awaiting T+60—$4.20 (−7.89%)
Sep 30, 2026
26d ago
SC TO-I/A
BULLISH ★ 6/10
$4.78awaiting T+60—$4.20 (−12.13%)
Sep 30, 2026
26d ago
Press Release
NEUTRAL ★ 5/10
$4.78awaiting T+60—$4.20 (−12.13%)
Aug 21, 2026
9w ago
8-K
BULLISH ★ 7/10
$5.21awaiting T+60—$4.20 (−19.39%)
Aug 15, 2026
10w ago
Institutional Cluster
MIXED ★ 4/10
$4.71awaiting T+60—$4.20 (−10.83%)
Showing 10 of 18

US Market Status

Market Closed — Opens Tue (< 1m)

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Report published Oct 5, 2026