---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-335921"
form_type: "8-K"
ticker: "ADPT"
cik: "0001478320"
company_name: "Adaptive Biotechnologies Corp"
filed_at: "2025-12-30T23:59:59+00:00"
generated_at: "2026-05-16T11:58:35.723731+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Adaptive Biotechnologies subsidiary Digital Biotechnologies closes Series A up to $15M

## Summary
- Digital Biotechnologies, 70%-owned subsidiary, held initial closing of Series A Preferred Stock financing.
- Anticipated total proceeds of up to $15 million from the Series A round.
- Upon completion, Adaptive expects to retain nearly 50% ownership and continue consolidating Digital's results.
- Digital Biotechnologies is an early-stage company with no revenues and limited activities to date.

## SEC filing metadata
- accession: 0001193125-25-335921
- form_type: 8-K
- ticker: ADPT
- cik: 0001478320
- company_name: Adaptive Biotechnologies Corp
- filed_at: 2025-12-30T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1478320/000119312525335921/0001193125-25-335921-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1478320/000119312525335921/d81101d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-335921
- JSON: https://secwatch.observer/filing/0001193125-25-335921.json
- Plain text: https://secwatch.observer/filing/0001193125-25-335921.txt

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