secwatch / observer
8-K filed June 2, 2026, 6:05 AM ET ticker PAGP CIK 0001581990
leadership confidence high sentiment neutral materiality 0.40

Plains GP Holdings announces CAO succession: Montgomery promoted, Herbold retiring

PLAINS GP HOLDINGS LP

Machine-readable event card

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secwatch.filing_event.v1
accession
0001104659-26-069164
form_type
8-K
ticker
PAGP
cik
0001581990
company_name
PLAINS GP HOLDINGS LP
filed_at
2026-06-02T10:05:30+00:00
discovered_at
2026-06-02T10:10:00.237587+00:00
generated_at
2026-06-02T10:11:24.406469+00:00
sec_items
["5.02"]
event_type
leadership
sentiment
neutral
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0.4
calibrated_materiality_score
0.4
confidence
high
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https://secwatch.observer/filing/0001104659-26-069164.json
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https://secwatch.observer/filing/0001104659-26-069164.md
text_url
https://secwatch.observer/filing/0001104659-26-069164.txt
edgar_index_url
https://www.sec.gov/Archives/edgar/data/1581990/000110465926069164/0001104659-26-069164-index.htm
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https://www.sec.gov/Archives/edgar/data/1581990/000110465926069164/tm2614304d4_8k.htm
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Executive movements

Machine-extracted from this filing. Every card cites the SEC source. See all recent executive movements.

Appointed

Russ Montgomery

Vice President, Accounting and Chief Accounting Officer
PAGP · PLAINS GP HOLDINGS LP
Effective
2026-09-01
Filed
June 2, 2026, 6:05 AM ET
effective September 1, 2026, 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.
Departed

Chris Herbold

Senior Vice President, Finance and Chief Accounting Officer
PAGP · PLAINS GP HOLDINGS LP
Effective
2026-08-31
Successor
Russ Montgomery
Filed
June 2, 2026, 6:05 AM ET
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.

Source-grounded claims

74c64afb2a

Russ Montgomery was appointed as Vice President, Accounting and Chief Accounting Officer at PLAINS GP HOLDINGS LP.

effective September 1, 2026, 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.

SEC 8-K Item 5.02 confidence 0.95 SEC evidence

7db74abbf2

Chris Herbold departed as Senior Vice President, Finance and Chief Accounting Officer at PLAINS GP HOLDINGS LP.

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.

SEC 8-K Item 5.02 confidence 0.95 SEC evidence

Comparable filings

ONCY

Oncolytics appoints Steve Glover to board, promotes John McAdory to COO

ONCOLYTICS BIOTECH INC June 2, 2026, 9:02 AM ET leadership Items 5.02, 8.01, 9.01

same fact type: executive_change same SEC item: 5.02 same event type: leadership similar materiality

This filing

effective September 1, 2026, 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.

Comparable filing

appointed John McAdory as Chief Operating Officer of the Company

Filing page SEC filing

ACHV

Achieve Life Sciences appoints Jeff Farrow and Dr. Reid Waldman to Board

ACHIEVE LIFE SCIENCES, INC. June 2, 2026, 8:51 AM ET leadership Items 5.02

same fact type: executive_change same SEC item: 5.02 same event type: leadership similar materiality

This filing

effective September 1, 2026, 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.

Comparable filing

the Board of Directors (the “Board”) of Achieve Life Sciences, Inc. (the “Company”) appointed Jeff Farrow and Reid Waldman, M.D. (together, the “Incoming Directors”), as directors, effective as of such date.

Filing page SEC filing

GOOD

Gladstone Commercial elects George Stelljes as director; board expands to eight

GLADSTONE COMMERCIAL CORP June 2, 2026, 8:45 AM ET leadership Items 5.02, 7.01, 9.01

same fact type: executive_change same SEC item: 5.02 same event type: leadership similar materiality

This filing

effective September 1, 2026, 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.

Comparable filing

On June 1, 2026, the Board of Directors (the “Board”) of Gladstone Commercial Corporation (the “Company”) elected George “Chip” Stelljes, III to the Board, effective June 1, 2026.

Filing page SEC filing

GAIN

Gladstone Investment Elects George Stelljes to Board, Expands to 8 Directors

GLADSTONE INVESTMENT CORPORATION\DE June 2, 2026, 8:45 AM ET leadership Items 5.02, 7.01, 9.01

same fact type: executive_change same SEC item: 5.02 same event type: leadership similar materiality

This filing

effective September 1, 2026, 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.

Comparable filing

On June 1, 2026, the Board of Directors (the “Board”) of Gladstone Investment Corporation (the “Company”) elected George “Chip” Stelljes, III to the Board, effective June 1, 2026.

Filing page SEC filing

OSCR

Oscar Health Co-Founder Schlosser transitions from CTO to Advisor to CEO

Oscar Health, Inc. June 2, 2026, 6:31 AM ET leadership Items 5.02

same fact type: executive_change same SEC item: 5.02 same event type: leadership similar materiality

This filing

effective September 1, 2026, 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.

Comparable filing

Mr. Schlosser’s transition from President of Technology and Chief Technology Officer of the Company to Co-Founder & Advisor to the CEO.

Filing page SEC filing

PAA

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

PLAINS ALL AMERICAN PIPELINE LP June 2, 2026, 6:03 AM ET leadership Items 5.02

same fact type: executive_change same SEC item: 5.02 same event type: leadership similar materiality

This filing

effective September 1, 2026, 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.

Comparable filing

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.

Filing page SEC filing

AHCO

AdaptHealth amends 8-K to disclose COO Daniel McFadden's compensation: base salary raised to $550K, plus RSU grant

AdaptHealth Corp. June 1, 2026, 9:02 PM ET leadership Items 5.02, 9.01

same fact type: executive_change same SEC item: 5.02 same event type: leadership similar materiality

This filing

effective September 1, 2026, 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.

Comparable filing

the appointment of Daniel McFadden as Chief Operating Officer of the Company, effective as of May 4, 2026

Filing page SEC filing

HON

Honeywell appoints Jill Evanko to Board of Directors, effective June 1, 2026

HONEYWELL INTERNATIONAL INC June 1, 2026, 8:12 PM ET leadership Items 5.02, 7.01, 9.01

same fact type: executive_change same SEC item: 5.02 same event type: leadership similar materiality

This filing

effective September 1, 2026, 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.

Comparable filing

Ms. Jillian Evanko, 48, Chief Executive Officer of Duravant LLC, has been appointed to serve as an Independent Director on the Company’s Board of Directors and a member of the Audit Committee, in each case, effective June 1, 2026.

Filing page SEC filing

Source: SEC EDGAR
accession 0001104659-26-069164

This headline and bullets were generated automatically by deepseek-v4-flash:cloud@v2 from the public filing. Read the source on SEC.gov before relying on any specific claim. Not investment advice. See methodology for how this pipeline works.