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ABUS
NASDAQ Life Sciences

Arbutus Biopharma's European Patent Revoked by EPO Board of Appeal

Arie Shkolnikov · Analysis by Wiseek AI
More coverage: Biotech Stocks · Healthcare
Sentiment info
Negative
Importance info
7
Price
$4.055
Mkt Cap
$779.874M
52W Low
$2.705
52W High
$5.1
52W Position info
50% above low
Off High info
20% below high
Rel. Volume info
0.7× avg
Market data snapshot near publication time

ABUS sits 50% above its 52-week low of $2.705.

Summary

The European Patent Office Board of Appeal revoked Arbutus Biopharma's European patent EP 2279254, which is expected to impact certain ongoing litigation against Moderna in Europe.


Key Events · Legal and Risk Events · ABUS

  • European Patent Revoked

    The European Patent Office (EPO) Board of Appeal verbally decided to revoke European patent EP 2279254, which was opposed by Moderna and Merck affiliates.

  • Impact on Litigation

    The decision is likely to affect patent infringement cases against Moderna in Switzerland and one case in the Unified Patent Court where the '254 Patent is asserted.

  • Limited Broader Impact Claimed

    Arbutus Biopharma states the decision is not expected to impact its patent litigation against Moderna in the U.S., Japan, or Canada, or other cases against Moderna, Pfizer, and BioNTech.

  • Appeal Planned

    The company disagrees with the outcome and plans to file a petition for review by the Enlarged Board of Appeal of the EPO upon receipt of the written decision.


Analysis · ABUS · Life Sciences

The revocation of a key European patent by the EPO Board of Appeal represents a setback for Arbutus Biopharma, as it directly affects ongoing patent infringement cases against Moderna in Switzerland and one of two cases in the Unified Patent Court where this patent is asserted. While the company asserts this decision, based on an "added matter" standard not applicable in the U.S., will not impact its U.S., Japanese, or Canadian litigation, or other European cases, the loss of intellectual property in a major market is a material event for a life sciences company. Investors should monitor the company's planned petition for review by the Enlarged Board of Appeal and the specific implications for the affected European litigation.

At the time of this filing, ABUS was trading at $4.06 on NASDAQ in the Life Sciences sector, with a market capitalization of approximately $779.9M. The 52-week trading range was $2.71 to $5.10. This filing was assessed with negative market sentiment and an importance score of 7 out of 10.

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ABUS
May 27, 2026, 4:01 PM EDT
Filing Type: 8-K
Importance Score:
7
Price at Filing: $4.64
Real-time Price: $4.90 info
Change: +$0.260 (+6%) info
Market Cap: $948.181M info
ABUS
May 13, 2026, 7:31 AM EDT
Filing Type: 10-Q
Importance Score:
9
Price at Filing: $4.43
Real-time Price: $4.90 info
Change: +$0.470 (+11%) info
Market Cap: $948.181M info
ABUS
May 13, 2026, 7:31 AM EDT
Filing Type: 8-K
Importance Score:
9
Price at Filing: $4.43
Real-time Price: $4.90 info
Change: +$0.470 (+11%) info
Market Cap: $948.181M info
ABUS
Apr 28, 2026, 5:54 PM EDT
Filing Type: SCHEDULE 13D/A
Importance Score:
7
Price at Filing: $4.15
Real-time Price: $4.90 info
Change: +$0.750 (+18%) info
Market Cap: $948.181M info
ABUS
Apr 15, 2026, 7:31 AM EDT
Filing Type: 8-K
Importance Score:
8
Price at Filing: $4.45
Real-time Price: $4.90 info
Change: +$0.450 (+10%) info
Market Cap: $948.181M info
ABUS
Apr 15, 2026, 7:30 AM EDT
Source: GlobeNewswire
Importance Score:
8
Price at Filing: $4.41
Real-time Price: $4.90 info
Change: +$0.490 (+11%) info
Market Cap: $948.181M info
ABUS
Apr 14, 2026, 5:02 PM EDT
Filing Type: DEF 14A
Importance Score:
7
Price at Filing: $4.35
Real-time Price: $4.90 info
Change: +$0.550 (+13%) info
Market Cap: $948.181M info
ABUS
Apr 13, 2026, 7:56 PM EDT
Filing Type: SCHEDULE 13D/A
Importance Score:
7
Price at Filing: $4.31
Real-time Price: $4.90 info
Change: +$0.5896 (+14%) info
Market Cap: $948.181M info
ABUS
Mar 23, 2026, 7:31 AM EDT
Filing Type: 8-K
Importance Score:
10
Price at Filing: $4.24
Real-time Price: $4.90 info
Change: +$0.660 (+16%) info
Market Cap: $948.181M info
ABUS
Mar 23, 2026, 7:30 AM EDT
Filing Type: 10-K
Importance Score:
9
Price at Filing: $4.24
Real-time Price: $4.90 info
Change: +$0.660 (+16%) info
Market Cap: $948.181M info