---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-069156"
form_type: "8-K"
ticker: "PAA"
cik: "0001070423"
company_name: "PLAINS ALL AMERICAN PIPELINE LP"
filed_at: "2026-06-02T10:03:41+00:00"
generated_at: "2026-06-02T10:12:07.277916+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Plains All American announces CAO retirement and Montgomery promotion effective Sep 1, 2026

## Summary
- Chris Herbold, SVP Finance and Chief Accounting Officer, retiring on Aug 31, 2026.
- Russ Montgomery promoted to VP Accounting and CAO effective Sep 1, 2026; previously VP Controller since 2019.
- Montgomery has held various Plains accounting roles since 2002, including Controller and Director of Operational Accounting.

## SEC filing metadata
- accession: 0001104659-26-069156
- form_type: 8-K
- ticker: PAA
- cik: 0001070423
- company_name: PLAINS ALL AMERICAN PIPELINE LP
- filed_at: 2026-06-02T10:03:41+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1070423/000110465926069156/0001104659-26-069156-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1070423/000110465926069156/tm2615397d2_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-069156
- JSON: https://secwatch.observer/filing/0001104659-26-069156.json
- Plain text: https://secwatch.observer/filing/0001104659-26-069156.txt

## Source-grounded claims
- claim_id: 425810a060
  claim: Chris Herbold departed as Senior Vice President, Finance and Chief Accounting Officer at PLAINS ALL AMERICAN PIPELINE LP.
  evidence_excerpt: Chris Herbold, who previously served as Senior Vice President, Finance and Chief Accounting Officer of PAA and PAGP, is retiring from the company on August 31, 2026.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1070423/000110465926069156/0001104659-26-069156-index.htm
- claim_id: c915c044f6
  claim: Russ Montgomery was appointed as Vice President, Accounting and Chief Accounting Officer at PLAINS ALL AMERICAN PIPELINE LP.
  evidence_excerpt: Russ Montgomery will be promoted to the position of Vice President, Accounting and Chief Accounting Officer of Plains All American GP LLC, the general partner of PAA, and PAA GP Holdings LLC, the general partner of PAGP.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1070423/000110465926069156/0001104659-26-069156-index.htm

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