---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-25-027975"
form_type: "8-K"
ticker: "MBRX"
cik: "0001659617"
company_name: "Moleculin Biotech, Inc."
filed_at: "2025-08-29T23:59:59+00:00"
generated_at: "2026-05-17T09:13:52.888596+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Moleculin Biotech raises $6.0M via warrant exercise; issues 64.9M new warrants at $0.55

## Summary
- Gross proceeds of $6.0M from immediate cash exercise of 16.2M existing warrants at $0.37/share.
- Issues new unregistered Series F warrants to purchase up to 64.9M shares at $0.55, exercisable upon shareholder approval.
- New warrants have 5-year term, anti-dilution protection with a floor of $0.11, and a 4.99%/9.99% beneficial ownership cap.
- Company to file resale registration statement by Sep 26, 2025; use proceeds for working capital.
- Transaction closed Aug 28, 2025; Roth Capital Partners acted as financial advisor.

## SEC filing metadata
- accession: 0001437749-25-027975
- form_type: 8-K
- ticker: MBRX
- cik: 0001659617
- company_name: Moleculin Biotech, Inc.
- filed_at: 2025-08-29T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 1.01, 3.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1659617/000143774925027975/0001437749-25-027975-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1659617/000143774925027975/mbrx20250828_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-25-027975
- JSON: https://secwatch.observer/filing/0001437749-25-027975.json
- Plain text: https://secwatch.observer/filing/0001437749-25-027975.txt

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