Ginkgo Bioworks Completes Divestiture of Biosecurity Segment to Tower Biosecurity for 20% Equity Stake

On April 3, 2026, Ginkgo Bioworks Holdings, Inc. completed the divestiture of its Biosecurity segment to Tower Biosecurity, Inc. (also known as Perimeter Systems, Inc.). Under the terms of the Stock Purchase Agreement, Ginkgo contributed all equity interests of its subsidiary, Ginkgo Biosecurity, LLC, to Tower Biosecurity. In exchange, Ginkgo received shares of Tower Biosecurity common stock representing approximately 20% of the purchaser's issued and outstanding equity on a fully diluted basis. The transaction marks a strategic shift for the company, resulting in the classification of the Biosecurity segment as discontinued operations. Pro forma financial statements included in the filing reflect the impact of this separation. For the year ended December 31, 2025, the pro forma net loss was $287.8 million compared to a historical net loss of $312.8 million. Ginkgo and Tower Biosecurity also entered into a Transition Services Agreement (TSA) to provide specified services on a temporary basis following the closing. Ginkgo will account for its 20% stake in Tower Biosecurity under the equity method of accounting.