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Get filing alertsPlains GP Holdings names Dean Liollio as new COO, replacing Chris Chandler
Filed September 29, 2026 · Period ending September 25, 2026 · ~1 min read
Key Changes
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Dean Liollio appointed EVP and COO of Plains All American GP LLC and PAA GP Holdings LLC, effective October 2, 2026.
Item 5.02 verify on EDGAR → -
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Chris Chandler resigns as EVP and COO effective October 2, 2026, to pursue other interests; no disagreement with company operations, policies, or practices.
Item 5.02 verify on EDGAR → -
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Liollio's compensation: $625,000 base salary, 150% annual bonus target, and 150,000 phantom units vesting August 2029.
Item 5.02 verify on EDGAR → -
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Liollio, 67, has held senior roles at Plains since 2008, including President of Plains Midstream Canada and SVP of Special Projects.
Exhibit 99.1 view on EDGAR →
Summary
Plains GP Holdings announced a leadership transition at the top of its operations. Dean Liollio, a long-time Plains executive, will become Executive Vice President and Chief Operating Officer effective October 2, 2026. He replaces Chris Chandler, who is resigning to pursue other interests. The company stated that Chandler's departure is not due to any disagreement regarding operations, policies, or practices.
Liollio brings deep internal experience, having served in president-level roles across Plains' Canadian, natural gas storage, and gas solutions businesses since 2008. His appointment signals continuity in leadership and strategy. The compensation package includes a $625,000 base salary, a 150% bonus target, and a promotional long-term incentive grant of 150,000 phantom units vesting in 2029.
For retail holders, this is a routine executive succession with no red flags. The transition appears orderly, with an internal candidate stepping into the role and the outgoing COO leaving on amicable terms.
Section-by-Section Diff
Event · Exhibit 99.1
Plains appoints Dean Liollio as EVP & COO effective Oct 2, 2026, replacing Chris Chandler who is resigning.
Added in current filing · view on EDGAR →
Dean Liollio has been appointed to serve as Executive Vice President and Chief Operating Officer of Plains effective as of October 2, 2026.
Plains announced a new Chief Operating Officer. Dean Liollio, previously Senior Vice President of Special Projects, will take on the EVP and COO role starting October 2, 2026.
Added in current filing · view on EDGAR →
Mr. Liollio replaces Chris Chandler, the current EVP and COO, who is resigning from Plains to pursue other interests and not due to any disagreement relating to the company’s operations, policies or practices.
The outgoing COO, Chris Chandler, is leaving to pursue other interests. The company explicitly states the resignation is not due to any disagreement about operations, policies, or practices, which is a positive signal for continuity.
Added in current filing · verify on EDGAR →
Mr. Liollio, age 67, served as Senior Vice President, Special Projects, of Plains from June 2024 until his appointment as EVP and COO in October 2026. He previously served as President of Plains Midstream Canada from 2020 until 2024, as President of PAA Natural Gas Storage from 2008 until 2020 and as President of Plains Gas Solutions from 2016 until 2020.
The new COO has deep internal experience at Plains, having held multiple president-level roles across the company's Canadian, natural gas storage, and gas solutions segments since 2008. This internal promotion suggests continuity in leadership and strategy.
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Figures/quotes linked to EDGAR · Narrative written by AI · Sep 30, 2026 · How we verify