TwinStrand Biosciences Announces Final Judgment in Patent Infringement Suit Against Guardant Health, Awarding TwinStrand and the University of Washington More Than $245.2 Million in Damages, Accrued Royalties and Interest

TwinStrand Biosciences Announces Final Judgment in Patent Infringement Suit Against Guardant Health, Awarding TwinStrand and the University of Washington More Than $245.2 Million in Damages, Accrued Royalties and Interest

Court preserves 2023 willful infringement verdict and orders a 6% royalty on sales of 11 Guardant Health products and services found to infringe two patents underlying TwinStrand Duplex Sequencing® technology

Court enters judgment in favor of TwinStrand and the University of Washington on validity of the asserted claims of both patents

TwinStrand Biosciences (TwinStrand), the pioneer in Duplex Sequencing® technology, today announced that the U.S. District Court for the District of Delaware entered final judgment on Aug. 21, 2026, in favor of TwinStrand and the University of Washington (UW) in their patent infringement suit against Guardant Health, Inc. (Nasdaq: GH). The final judgment preserves a November 2023 jury verdict finding that Guardant Health willfully infringed two core patents underlying TwinStrand's Duplex Sequencing technology across 11 royalty-bearing products and services, and awards TwinStrand and UW more than $245.2 million in damages, accrued royalties and interest for infringement that occurred through May 31, 2026.