---
schema_version: "secwatch.filing_event.v1"
accession: "0001493152-25-013635"
form_type: "8-K"
ticker: "DYAI"
cik: "0001213809"
company_name: "DYADIC INTERNATIONAL INC"
filed_at: "2025-09-16T23:59:59+00:00"
generated_at: "2026-05-17T06:27:36.217711+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Dyadic amends security agreement; CEO's trust added as secured party for $1M note purchase

## Summary
- CEO Mark Emalfarb purchased and was assigned a $1,000,000 Senior Secured Convertible Promissory Note due March 8, 2027.
- Amendment added Mark A. Emalfarb Trust as a secured party with $1,000,000 principal.
- Other secured parties updated: Francisco Trust $1M, Barry M. Kitt $1M, CK Management $1M, and others.
- Amendment executed September 15, 2025, effective immediately.

## SEC filing metadata
- accession: 0001493152-25-013635
- form_type: 8-K
- ticker: DYAI
- cik: 0001213809
- company_name: DYADIC INTERNATIONAL INC
- filed_at: 2025-09-16T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1213809/000149315225013635/0001493152-25-013635-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1213809/000149315225013635/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001493152-25-013635
- JSON: https://secwatch.observer/filing/0001493152-25-013635.json
- Plain text: https://secwatch.observer/filing/0001493152-25-013635.txt

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