ISSUER PROFILE · CIK 0001447028 · CUSIP 03879J100
Arbutus Biopharma CorpABUS
27 13D/G filings
8 distinct filers
0 insider transactions (365d)
1 UNCLEAR
Post-Filing Returns · across 5 activist filings on this issuer
Median 180d
+1.0%
avg +0.9%
Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.
Cross-Reference Snapshot
Activist filings
27
3 SCHEDULE 13D/A · 1 SCHEDULE 13G · 3 SCHEDULE · 20 SC
Distinct filers
8
multi-activist cluster
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
4.34
as of 2026-10-15
13D/G Filings Timeline · 27 total
| Filed | Form | Filer | Stake | Shares | Intent | |
|---|
| 2026-10-05 |
SCHEDULE 13D/A |
Roivant Sciences Ltd. |
19.50% |
29,880,079 |
|
view → |
| 2026-09-04 |
SCHEDULE 13G |
Whitefort Capital Management, LP |
— |
— |
|
view → |
| 2026-04-28 |
SCHEDULE 13D/A |
Whitefort Capital Management, LP |
— |
15,794,261 |
|
view → |
| 2026-04-13 |
SCHEDULE 13D/A |
Whitefort Capital Management, LP |
8.10% |
15,794,261 |
UNCLEAR |
view → |
| 2025-02-25 |
SCHEDULE |
Roivant Sciences Ltd. |
20.50% |
38,847,462 |
|
view → |
| 2025-02-21 |
SCHEDULE |
Whitefort Capital Management, LP |
7.00% |
13,307,967 |
|
view → |
| 2025-02-18 |
SCHEDULE |
Roivant Sciences Ltd. |
20.50% |
38,847,462 |
|
view → |
| 2021-10-20 |
SC |
Roivant Sciences Ltd. |
— |
— |
|
view → |
| 2019-07-17 |
SC |
Lo Andrew |
— |
— |
|
view → |
| 2019-07-17 |
SC |
Machado Patrick |
— |
— |
|
view → |
| 2019-07-16 |
SC |
Roivant Sciences Ltd. |
— |
— |
|
view → |
| 2019-07-12 |
SC |
Dexxon Holdings Ltd. |
— |
— |
|
view → |
| 2019-07-12 |
SC |
SVF Investments (UK) Ltd |
— |
— |
|
view → |
| 2019-07-12 |
SC |
VIKING GLOBAL INVESTORS LP |
— |
— |
|
view → |
| 2019-07-12 |
SC |
QVT Financial LP |
— |
— |
|
view → |
| 2019-01-03 |
SC |
VIKING GLOBAL INVESTORS LP |
— |
— |
|
view → |
| 2018-04-23 |
SC |
Roivant Sciences Ltd. |
— |
— |
|
view → |
| 2018-04-12 |
SC |
Roivant Sciences Ltd. |
— |
— |
|
view → |
| 2018-03-16 |
SC |
Roivant Sciences Ltd. |
— |
— |
|
view → |
| 2018-02-14 |
SC |
Roivant Sciences Ltd. |
— |
— |
|
view → |
| 2018-01-16 |
SC |
Machado Patrick |
— |
— |
|
view → |
| 2018-01-16 |
SC |
Lo Andrew |
— |
— |
|
view → |
| 2018-01-16 |
SC |
SVF Investments (UK) Ltd |
— |
— |
|
view → |
| 2018-01-16 |
SC |
Roivant Sciences Ltd. |
— |
— |
|
view → |
| 2018-01-16 |
SC |
QVT Financial LP |
— |
— |
|
view → |
| 2018-01-16 |
SC |
Dexxon Holdings Ltd. |
— |
— |
|
view → |
| 2018-01-16 |
SC |
VIKING GLOBAL INVESTORS LP |
— |
— |
|
view → |
FINRA Short Interest History
| Settlement | Short Interest | Days to Cover | % Δ vs prior |
|---|
| 2026-10-15 |
24,566,591 |
4.34 |
-27.9% |
| 2026-09-30 |
34,053,358 |
3.53 |
+84.2% |
| 2026-09-15 |
18,484,910 |
5.01 |
-2.3% |
| 2026-08-31 |
18,916,119 |
3.08 |
+2.5% |
| 2026-08-14 |
18,456,085 |
15.10 |
-8.8% |
| 2026-07-31 |
20,236,241 |
13.69 |
+3.0% |
| 2026-07-15 |
19,653,287 |
7.40 |
+14.8% |
| 2026-06-30 |
17,111,453 |
4.89 |
-2.4% |
| 2026-06-15 |
17,522,670 |
13.96 |
+3.2% |
| 2026-05-29 |
16,982,764 |
9.18 |
+3.3% |
| 2026-05-15 |
16,438,082 |
17.08 |
-7.4% |
| 2026-04-30 |
17,743,389 |
7.17 |
-0.3% |
Alert me when any activist files on Arbutus Biopharma Corp
Free. We email you when criteria match. One-click unsubscribe in every email.
Track every activist who touches this name.
Free $0 (48h-delayed alerts) · Individual $49/mo (real-time) · Team & API $199/mo · Enterprise.
See pricing →