---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-24-008537"
form_type: "8-K"
ticker: "MBRX"
cik: "0001659617"
company_name: "Moleculin Biotech, Inc."
filed_at: "2024-03-19T23:59:59+00:00"
generated_at: "2026-06-04T13:27:46.191216+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Moleculin Biotech announces 1-for-15 reverse stock split to regain Nasdaq compliance

## Summary
- Reverse split at 1:15 ratio effective March 21, 2024 after market close; trading on split-adjusted basis from March 22.
- Outstanding shares reduced from ~33.4M to ~2.2M; authorized shares unchanged at 100M.
- Ticker symbol remains "MBRX" but new CUSIP 60855D309; no fractional shares, rounding up.
- Reverse split intended to cure minimum bid price deficiency for continued Nasdaq listing.
- Proportional adjustments to outstanding stock options, warrants, and equity plan shares.

## SEC filing metadata
- accession: 0001437749-24-008537
- form_type: 8-K
- ticker: MBRX
- cik: 0001659617
- company_name: Moleculin Biotech, Inc.
- filed_at: 2024-03-19T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 3.03, 5.03, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1659617/000143774924008537/0001437749-24-008537-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1659617/000143774924008537/mbrx20240318_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-24-008537
- JSON: https://secwatch.observer/filing/0001437749-24-008537.json
- Plain text: https://secwatch.observer/filing/0001437749-24-008537.txt

## Key facts
- Governance Changes
  Moleculin Biotech, Inc.: Reverse stock split of common stock at 1:15 ratio approved by stockholders and board, effective March 21, 2024 (effective 2024-03-21).
  - Change: charter amendment
  - Effective: 2024-03-21
  source text: The Amendment was filed with the Secretary of State of the State of Delaware and the Reverse Stock Split will become effective in accordance with the terms of the Amendment at 11:59 p.m. Eastern Time on March 21, 2024
  evidence_url: https://www.sec.gov/Archives/edgar/data/1659617/000143774924008537/0001437749-24-008537-index.htm

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