---
schema_version: "secwatch.filing_event.v1"
accession: "0001621434-25-000136"
form_type: "8-K"
ticker: "BSM"
cik: "0001621434"
company_name: "Black Stone Minerals, L.P."
filed_at: "2025-11-05T23:59:59+00:00"
generated_at: "2026-05-17T00:18:14.244280+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# BSM CEO to become Executive Chairman; co-CEOs appointed in succession plan

## Summary
- Thomas L. Carter, Jr. transitions to Executive Chairman on Jan 1, 2026; current Chair, CEO, Pres.
- Fowler Carter and Taylor DeWalch appointed co-CEOs and to Board effective Jan 1, 2026.
- Chris Bonner promoted to SVP, CFO, Treasurer; Erin Phillips becomes Controller and principal accounting officer.
- William Mathis resigned from Board on Oct 30, 2025; no disagreement.
- Fowler Carter is son of Thomas Carter; Taylor DeWalch is son of director Mark DeWalch (related parties).

## SEC filing metadata
- accession: 0001621434-25-000136
- form_type: 8-K
- ticker: BSM
- cik: 0001621434
- company_name: Black Stone Minerals, L.P.
- filed_at: 2025-11-05T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1621434/000162143425000136/0001621434-25-000136-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1621434/000162143425000136/bsm-20251030.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001621434-25-000136
- JSON: https://secwatch.observer/filing/0001621434-25-000136.json
- Plain text: https://secwatch.observer/filing/0001621434-25-000136.txt

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