---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-25-029852"
form_type: "8-K"
ticker: "BLGO"
cik: "0000880242"
company_name: "BIOLARGO, INC."
filed_at: "2025-09-25T23:59:59+00:00"
generated_at: "2026-05-17T05:44:26.145116+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# BioLargo revokes Pooph license due to $3.8M default; expects substantial impairment of $3.49M note receivable

## Summary
- Pooph owed BioLargo approximately $3.8M in past-due royalties and product invoices; BioLargo revoked license on Sept 24, 2025.
- BioLargo expects substantial impairment of its $3.486M note receivable from Pooph on its June 30 balance sheet.
- Pooph claims it independently developed a new formula and is terminating the manufacturing agreement, which BioLargo contests as breach.
- Pooph's products powered by BioLargo tech reached annual sales over $50M; BioLargo will pursue new odor-control market opportunities.

## SEC filing metadata
- accession: 0001437749-25-029852
- form_type: 8-K
- ticker: BLGO
- cik: 0000880242
- company_name: BIOLARGO, INC.
- filed_at: 2025-09-25T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 1.02, 2.06, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/880242/000143774925029852/0001437749-25-029852-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/880242/000143774925029852/blgo20250924_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-25-029852
- JSON: https://secwatch.observer/filing/0001437749-25-029852.json
- Plain text: https://secwatch.observer/filing/0001437749-25-029852.txt

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