Arbutus Biopharma Corporation
US ˙ NasdaqGS ˙ CA03879J1003

SecurityABUS / Arbutus Biopharma Corporation
InstitutionUBS Group AG
Latest Disclosed Ownership364,471 shares
Latest Disclosed Value $ 1,640,121
UBS Group AG reports 147.45% increase in ownership of ABUS / Arbutus Biopharma Corporation

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 364,471 shares of Arbutus Biopharma Corporation (US:ABUS) valued at $1,640,120 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 147,292 shares of Arbutus Biopharma Corporation. This represents a change in shares of 147.45% during the quarter. The current value of the position is $1,585,449 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-05 2026-03-31 13F ARBUTUS BIOPHARMA COM 03879J100 364,471 217,179 147.45 1,640 131.64 0.0000
2026-01-29 2025-12-31 13F ARBUTUS BIOPHARMA COM 03879J100 147,292 -627,302 -80.98 708 -79.86 0.0001
2025-11-13 2025-09-30 13F ARBUTUS BIOPHARMA COM 03879J100 774,594 584,386 307.24 3,517 498.98 0.0006
2025-08-14 2025-06-30 13F ARBUTUS BIOPHARMA COM 03879J100 190,208 -2,084 -1.08 588 -12.52 0.0001
2025-05-13 2025-03-31 13F ARBUTUS BIOPHARMA COM 03879J100 192,292 91,287 90.38 671 103.33 0.0001
2025-02-14 2024-12-31 13F ARBUTUS BIOPHARMA COM 03879J100 101,005 -67,369 -40.01 330 -49.07 0.0001
2024-11-14 2024-09-30 13F ARBUTUS BIOPHARMA COM 03879J100 168,374 112,709 202.48 648 276.74 0.0001
2024-08-14 2024-06-30 13F ARBUTUS BIOPHARMA COM 03879J100 55,665 -79,158 -58.71 172 -50.43 0.0000
2024-05-13 2024-03-31 13F ARBUTUS BIOPHARMA COM 03879J100 134,823 -5,148 -3.68 348 -0.57 0.0001
2024-02-09 2023-12-31 13F ARBUTUS BIOPHARMA COM 03879J100 139,971 77,353 123.53 350 174.80 0.0001
2023-11-09 2023-09-30 13F ARBUTUS BIOPHARMA COM 03879J100 62,618 -5,549 -8.14 127 -18.59 0.0000
2023-08-11 2023-06-30 13F ARBUTUS BIOPHARMA COM 03879J100 68,167 31,502 85.92 157 40.54 0.0001
2023-05-12 2023-03-31 13F ARBUTUS BIOPHARMA COM 03879J100 36,665 13,376 57.43 111 105.56 0.0000
2023-02-08 2022-12-31 13F ARBUTUS BIOPHARMA COM 03879J100 23,289 23,289 54 0.0000
2022-08-10 2022-06-30 13F ARBUTUS BIOPHARMA COM 03879J100 0 -1,298 -100.00 0 -100.00
2022-05-16 2022-03-31 13F ARBUTUS BIOPHARMA COM 03879J100 1,298 -32,810 -96.19 4 -96.97 0.0000
2022-02-14 2021-12-31 13F ARBUTUS BIOPHARMA COM 03879J100 34,108 34,108 132 0.0000
2021-11-15 2021-09-30 13F ARBUTUS BIOPHARMA COM 03879J100 0 -62,310 -100.00 0 -100.00
2021-08-13 2021-06-30 13F ARBUTUS BIOPHARMA COM 03879J100 62,310 -10,805 -14.78 189 -22.54 0.0001
2021-05-12 2021-03-31 13F ARBUTUS BIOPHARMA COM 03879J100 73,115 55,189 307.87 244 281.25 0.0001
2021-02-11 2020-12-31 13F ARBUTUS BIOPHARMA COM 03879J100 17,926 10,913 155.61 64 190.91 0.0000
2020-11-12 2020-09-30 13F ARBUTUS BIOPHARMA COM 03879J100 7,013 -317,279 -97.84 22 -96.27 0.0000
2020-07-31 2020-06-30 13F ARBUTUS BIOPHARMA COM 03879J100 324,292 -45,856 -12.39 590 57.75 0.0002
2020-05-01 2020-03-31 13F ARBUTUS BIOPHARMA COM 03879J100 370,148 126,930 52.19 374 -44.67 0.0002
2020-02-14 2019-12-31 13F ARBUTUS BIOPHARMA COM 03879J100 243,218 57,094 30.68 676 138.03 0.0002
2019-11-14 2019-09-30 13F ARBUTUS BIOPHARMA COM 03879J100 186,124 19,715 11.85 284 -17.92 0.0001
2019-08-14 2019-06-30 13F ARBUTUS BIOPHARMA COM 03879J100 166,409 160,650 2,789.55 346 1,547.62 0.0001
2019-05-14 2019-03-31 13F ARBUTUS BIOPHARMA COM 03879J100 5,759 1,154 25.06 21 16.67 0.0000
2019-02-14 2018-12-31 13F ARBUTUS BIOPHARMA COM 03879J100 4,605 3,218 232.01 18 38.46 0.0000
2018-11-14 2018-09-30 13F ARBUTUS BIOPHARMA COM 03879J100 1,387 -36,375 -96.33 13 -95.29 0.0000
2018-08-14 2018-06-30 13F ARBUTUS BIOPHARMA COM 03879J100 37,762 -4,203 -10.02 276 31.43 0.0001
2018-05-15 2018-03-31 13F ARBUTUS BIOPHARMA COM 03879J100 41,965 -2,396 -5.40 210 -6.25 0.0001
2018-02-14 2017-12-31 13F ARBUTUS BIOPHARMA COM 03879J100 44,361 -8,205 -15.61 224 -31.29 0.0001
2017-11-14 2017-09-30 13F ARBUTUS BIOPHARMA COM 03879J100 52,566 52,451 45,609.57 326 0.0002
2017-11-14 2017-06-30 13F/A-1 ARBUTUS BIOPHARMA COM 03879J100 115 -1,739 -93.80 0 -100.00
2017-08-14 2017-06-30 13F ARBUTUS BIOPHARMA COM 03879J100 115 -1,739 0
2017-11-14 2017-03-31 13F/A-1 ARBUTUS BIOPHARMA COM 03879J100 1,854 -3,646 -66.29 6 -68.42 0.0000
2017-05-12 2017-03-31 13F ARBUTUS BIOPHARMA COM 03879J100 1,854 -3,646 6
2016-11-14 2016-09-30 13F ARBUTUS BIOPHARMA COM 03879J100 5,500 -578 -9.51 19 -9.52 0.0000
2016-08-12 2016-06-30 13F ARBUTUS BIOPHARMA COM 03879J100 6,078 345 6.02 21 -12.50 0.0000
2016-05-12 2016-03-31 13F ARBUTUS BIOPHARMA COM 03879J100 5,733 -2,326 -28.86 24 -31.43 0.0000
2016-02-16 2015-12-31 13F ARBUTUS BIOPHARMA COM 03879J100 8,059 547 7.28 35 -23.91 0.0000
2015-11-13 2015-09-30 13F ARBUTUS BIOPHARMA COM 03879J100 7,512 7,512 46 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.