Arbutus Biopharma ABUS Insider Ownership

NASDAQ ABUS

$4.28 -0.05 (-1.15%)

As of: Oct 21, 2026 · 10:38 AM EDT

Insider Holdings by Owner

34.11Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

1.26%

▲+0.075% pp QoQ

Shares Held by Insiders

2.50Mn

filed for Sep 2026

▲+6.29% QoQ

Shares Outstanding

197.63Mn

197,634,118 shares

Direct Holdings

2.50Mn

Indirect: 0

Net Shares Traded (QoQ)

+147.83K

net buying in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Over the past year, ABUS insiders did not buy or sell the stock on the open market.

Apart from open-market trades, ABUS insiders received 101.5K shares in stock awards, acquired 603.83K shares through option exercises and conversions and gave up 488.73K shares to cover taxes or exercise prices in the past 12 months.
According to Business Quant data, insiders at Arbutus Biopharma reported 32.27Mn shares in total in their latest Form 4 filings.
ABUS's insiders hold all 32.27Mn shares directly, in their own names, with no indirect holdings.
The insider holdings in Arbutus Biopharma belong to 9 insiders who have reported on Form 4 within the past two years.
ABUS's largest insider holders by reported holdings are Roivant Sciences Ltd. (Director and 10% owner, 29.88Mn shares), Michael J. McElhaugh (Interim President & CEO, 1.66Mn shares) and David C. Hastings (Chief Financial Officer, 249.82K shares).
Roivant Sciences Ltd. alone accounts for 92.59% of the shares held by Arbutus Biopharma insiders.
Institutions held 71.05% of Arbutus Biopharma's outstanding shares in their Q2 2026 13F filings, insiders about 16.33% based on their latest Form 4 filings, and other investors, including the public, the remaining 12.62%.
A total of 13 Form 4 filings with transactions in Arbutus Biopharma stock were made over the past 12 months, by 5 insiders.
The insider data for ABUS reflects Form 4 filings through October 7, 2026.

Form 4 Holdings

Insiders Holding ABUS

Insiders 13

Shares held 34.11Mn

Of outstanding 17.26%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Sciences Ltd. Roivant	Director, TenPercentOwner	29,880,079	29,880,079	87.6%	05 Oct, 2026
2	Michael J. Mcelhaugh	Interim President Ceo	1,658,003	1,658,003	4.9%	19 Feb, 2025
3	Michael J. Sofia	Chief Scientific Officer	1,485,121	1,485,121	4.4%	05 Feb, 2024
4	David C Hastings	Chief Financial Officer	249,824	249,824	0.7%	19 Feb, 2025
5	William H. Collier	President And Ceo	216,500	216,500	0.6%	03 Feb, 2023
6	Karen Sims	Chief Medical Officer	155,494	155,494	0.5%	19 Feb, 2025
7	J. Christopher Naftzger	General Counsel And Cco	140,544	140,544	0.4%	19 Feb, 2025
8	Tuan Nguyen	Chief Financial Officer	111,882	111,882	0.3%	07 Oct, 2026
9	Elizabeth Howard	Evp, Gc, Compliance	86,024	86,024	0.3%	03 Feb, 2023
10	Lindsay Androski	President And Ceo	47,682	47,682	0.1%	07 Oct, 2026
11	Keith S Manchester	Director	46,069	46,069	0.1%	16 Aug, 2024
12	Robert A Beardsley	Director	14,328	14,328	0.0%	07 Oct, 2026
13	Roger Sawhney	Director	13,683	13,683	0.0%	07 Oct, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

243 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
01 Oct, 2026	Roger Sawhney	Director	Disposed D	17,142	$5.00	$85.71K	13,683	Direct
01 Oct, 2026	Lindsay Androski	President And Ceo	Disposed D	24,655	$5.00	$123.28K	47,682	Direct
01 Oct, 2026	Robert A Beardsley	Director	Disposed D	17,948	$5.00	$89.74K	14,328	Direct
01 Oct, 2026	Tuan Nguyen	Chief Financial Officer	Disposed D	48,081	$5.00	$240.41K	111,882	Direct
01 Oct, 2026	Sciences Ltd. Roivant	Director, TenPercentOwner	Disposed D	8,967,383	$5.00	$44.84Mn	29,880,079	Direct
18 Sep, 2026	Tuan Nguyen	Chief Financial Officer	Acquired M	265,625	$3.49	$927.03K	339,125	Direct
18 Sep, 2026	Robert A Beardsley	Director	Acquired M	52,533	$3.20	$168.11K	52,533	Direct
18 Sep, 2026	Roger Sawhney	Director	Acquired M	52,533	$3.34	$175.46K	52,533	Direct
18 Sep, 2026	Lindsay Androski	President And Ceo	Acquired M	116,408	$3.20	$372.51K	144,408	Direct
18 Sep, 2026	Tuan Nguyen	Chief Financial Officer	Acquired M	27,475	$4.39	$120.62K	366,600	Direct
18 Sep, 2026	Robert A Beardsley	Director	Acquired M	78,800	$4.24	$334.11K	131,333	Direct
18 Sep, 2026	Lindsay Androski	President And Ceo	Acquired M	10,456	$4.39	$45.90K	154,864	Direct
18 Sep, 2026	Roger Sawhney	Director	Acquired M	78,800	$4.24	$334.11K	131,333	Direct
18 Sep, 2026	Robert A Beardsley	Director	Disposed F	99,057	$5.07	$502.22K	32,276	Direct
18 Sep, 2026	Lindsay Androski	President And Ceo	Disposed F	82,527	$5.07	$418.41K	72,337	Direct
18 Sep, 2026	Tuan Nguyen	Chief Financial Officer	Disposed F	206,637	$5.07	$1.05Mn	159,963	Direct
18 Sep, 2026	Roger Sawhney	Director	Disposed F	100,508	$5.07	$509.58K	30,825	Direct
18 Sep, 2026	Robert A Beardsley	Director	Disposed M	52,533	$0.00	$0	105,067	Direct
18 Sep, 2026	Lindsay Androski	President And Ceo	Disposed M	116,408	$0.00	$0	194,014	Direct
18 Sep, 2026	Roger Sawhney	Director	Disposed M	52,533	$0.00	$0	105,067	Direct

Showing 1 to 20 of 243 transactions