Form 8-K

8-K — PLAINS GP HOLDINGS LP

Accession: 0001104659-26-065743

Filed: 2026-05-22

Period: 2026-05-20

CIK: 0001581990

SIC: 4610 (PIPE LINES (NO NATURAL GAS))

Item: Submission of Matters to a Vote of Security Holders

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0001581990

PLAINS GP HOLDINGS LP

0001581990

2026-05-20

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UNITED

STATES

SECURITIES

AND EXCHANGE COMMISSION

Washington,

D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported)

– May

20, 2026

Plains GP Holdings, L.P.

(Exact name of registrant as specified in its charter)

Delaware

1-36132

90-1005472

(State

or other jurisdiction of

incorporation)

(Commission File Number)

(IRS Employer Identification No.)

333 Clay Street,

Suite 1600, Houston, Texas 77002

(Address of principal executive offices) (Zip Code)

713-646-4100

(Registrant’s telephone

number, including area code)

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended

to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant

to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of

each exchange on which

registered

Class A Shares

PAGP

Nasdaq

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934.

Emerging growth company ¨

If an emerging growth company, indicate

by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial

accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 5.07 Submission of Matters to a Vote of Security Holders.

The 2026 annual meeting of Class A, Class B

and Class C shareholders (collectively, the “Shareholders”) of Plains GP Holdings, L.P. (“PAGP” or the “Partnership”)

was held on May 20, 2026. At the annual meeting, the Shareholders considered and voted on the following matters, each of which is

described in greater detail in PAGP’s Proxy Statement dated April 10, 2026 (the “Proxy Statement”): (i) the

election of four Class I directors to serve on the board of directors of PAA GP Holdings LLC until the 2029 annual meeting; (ii) the

ratification of the appointment of PricewaterhouseCoopers LLP as PAGP’s and Plains All American Pipeline, L.P.’s (“PAA”)

independent registered public accounting firm for the fiscal year ending December 31, 2026; and (iii) the approval, on a non-binding

advisory basis, of our 2025 named executive officer compensation.

Out of the 763,943,591 Class A, Class B

and Class C shares entitled to vote on Items 1, 2 and 3, approximately 83.5%, or 638,017,947 shares, were represented in person or

by proxy at the PAGP annual meeting. The voting results for each matter presented at the PAGP annual meeting were as follows:

1. Class A, Class B and Class C shareholders voted on the election of four Class I directors to serve on the board

of directors of PAA GP Holdings LLC until the 2029 annual meeting as follows:

Percentage of Votes

Nominees

For

Withheld

Cast

FOR

Broker

Non-Votes

1. Willie Chiang

460,938,348

9,698,168

97.9%

167,381,431

2. Ellen DeSanctis

463,251,561

7,384,955

98.4%

167,381,431

3. Alexandra Pruner

461,255,477

9,381,039

98.0%

167,381,431

3. Larry Ziemba

460,487,242

10,194,274

97.8%

167,381,431

2. Class A, Class B and Class C shareholders voted on the ratification of the appointment of PricewaterhouseCoopers LLP

as PAGP’s and PAA’s independent registered public accounting firm for the fiscal year ending December 31, 2026 as follows:

Percentage of Votes

For

Against

Abstained

Cast FOR

Broker Non-Votes

629,742,215

7,535,341

740,391

98.7%

-0-

3. Class A, Class B and Class C shareholders voted on the approval, on a non-binding advisory basis, of our 2025 named

executive officer compensation as follows:

Percentage of Votes

For

Against

Abstained

Cast FOR

Broker Non-Votes

302,893,968

165,486,984

2,255,563

64.4%

167,381,432

SIGNATURES

Pursuant to the requirements of the Securities

Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

PLAINS GP HOLDINGS, L.P.

Date: May 22, 2026

By: PAA GP Holdings LLC, its general partner

By:

/s/ Richard McGee

Name:

Richard McGee

Title:

Executive Vice President, General Counsel & Secretary

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Entity Registrant Name

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Entity Central Index Key

0001581990

Entity Tax Identification Number

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Entity Incorporation, State or Country Code

Entity Address, Address Line One

333 Clay Street

Entity Address, Address Line Two

Suite 1600

Entity Address, City or Town

Houston

Entity Address, State or Province

Entity Address, Postal Zip Code

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City Area Code

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Local Phone Number

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