---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-361105"
form_type: "8-K"
ticker: "MNKD"
cik: "0000899460"
company_name: "MANNKIND CORP"
filed_at: "2026-08-21T20:10:16+00:00"
generated_at: "2026-08-21T20:11:03.792806+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "low"
source: SEC EDGAR
---

# MannKind files prospectus supplement for common stock issuance under shelf registration

## Summary
- Filed prospectus supplement on Aug 21, 2026 to S-3 shelf (Reg. No. 333-285286) for common stock shares.
- Cooley LLP legal opinion on share issuance legality filed as Exhibit 5.1.
- No offering size, price, or use of proceeds disclosed in this 8-K.
- Filing is procedural ahead of a potential stock sale; no financial figures provided.

## SEC filing metadata
- accession: 0001193125-26-361105
- form_type: 8-K
- ticker: MNKD
- cik: 0000899460
- company_name: MANNKIND CORP
- filed_at: 2026-08-21T20:10:16+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: low
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/899460/000119312526361105/0001193125-26-361105-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/899460/000119312526361105/d118419d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-361105
- JSON: https://secwatch.observer/filing/0001193125-26-361105.json
- Plain text: https://secwatch.observer/filing/0001193125-26-361105.txt

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