---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-26-024101"
form_type: "8-K"
ticker: "DNA"
cik: "0001830214"
company_name: "Ginkgo Bioworks Holdings, Inc."
filed_at: "2026-04-07T23:59:59+00:00"
generated_at: "2026-05-15T07:06:11.304657+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Ginkgo completes sale of Biosecurity segment to Tower Biosecurity, retains 20% stake

## Summary
- On April 3, 2026, Ginkgo contributed all Biosecurity equity to Tower Biosecurity (Perimeter Systems) for ~20% of buyer's fully diluted shares.
- Biosecurity will be reported as discontinued operations starting Q1 2026; pro forma results show reduced operating losses.
- Pro forma 2025 net loss improved to $287.8M from $312.8M; 2024 loss improved to $507.6M from $547.0M.
- The retained 20% stake will be equity-method accounted; preliminary valuation of $12.3M.
- Ginkgo and Tower entered a Transition Services Agreement for temporary services.

## SEC filing metadata
- accession: 0001628280-26-024101
- form_type: 8-K
- ticker: DNA
- cik: 0001830214
- company_name: Ginkgo Bioworks Holdings, Inc.
- filed_at: 2026-04-07T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1830214/000162828026024101/0001628280-26-024101-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1830214/000162828026024101/dna-20260403.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-26-024101
- JSON: https://secwatch.observer/filing/0001628280-26-024101.json
- Plain text: https://secwatch.observer/filing/0001628280-26-024101.txt

## Key facts
- M&A Transactions
  Ginkgo Bioworks Holdings, Inc. completed a disposition involving Tower Biosecurity, Inc. also known as Perimeter Systems, Inc. (closed 2026-04-03).
  - Action: disposition
  - Counterparty: Tower Biosecurity, Inc. also known as Perimeter Systems, Inc.
  - Closing: 2026-04-03
  source text: On April 3, 2026, Ginkgo Bioworks, Inc. (the "Seller"), a wholly owned subsidiary Ginkgo Bioworks Holdings, Inc. (the "Company") completed the previously announced transaction (the "Transaction") with Tower Biosecurity, Inc. also known as Perimeter Systems, Inc. (the "Purchaser") pursuant to the Stock Purchase Agreement, dated as of February 26, 2026 (the "Purchase Agreement"), by and among the Seller, the Company, the Purchaser and Ginkgo Biosecurity, LLC ("Biosecurity").
  evidence_url: https://www.sec.gov/Archives/edgar/data/1830214/000162828026024101/0001628280-26-024101-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.