---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-25-037280"
form_type: "8-K"
ticker: "DMLP"
cik: "0001172358"
company_name: "DORCHESTER MINERALS, L.P."
filed_at: "2025-12-09T23:59:59+00:00"
generated_at: "2026-05-16T13:45:20.532947+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Dorchester Minerals: Co-founder McManemin retires from Board; Nance appointed, Vaughn Interim Chair

## Summary
- William Casey McManemin retires from Board effective Dec 31, 2025; named Chairman Emeritus (honorary, no compensation).
- Robert C. Vaughn, co-founder and current Board member, appointed Interim Chairman effective immediately.
- Albert G. Nance III appointed to Board effective Jan 1, 2026; brings 38 years of oil and gas experience.
- McManemin co-founded Dorchester predecessors in 1988 and served as CEO for 19 years.

## SEC filing metadata
- accession: 0001437749-25-037280
- form_type: 8-K
- ticker: DMLP
- cik: 0001172358
- company_name: DORCHESTER MINERALS, L.P.
- filed_at: 2025-12-09T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1172358/000143774925037280/0001437749-25-037280-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1172358/000143774925037280/dmlp20251209_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-25-037280
- JSON: https://secwatch.observer/filing/0001437749-25-037280.json
- Plain text: https://secwatch.observer/filing/0001437749-25-037280.txt

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