Form 8-K

8-K — PLAINS GP HOLDINGS LP

Accession: 0001104659-26-060360

Filed: 2026-05-13

Period: 2026-05-11

CIK: 0001581990

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

Item: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Item: Regulation FD Disclosure

Item: Financial Statements and Exhibits

Documents

8-K — tm2614304d2_8k.htm (Primary)

EX-99.1 — EXHIBIT 99.1 (tm2614304d2_ex99-1.htm)

GRAPHIC (tm2614304d2_ex99-1img01.jpg)

XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K — FORM 8-K

8-K (Primary)

Filename: tm2614304d2_8k.htm · Sequence: 1

false

0001581990

PLAINS GP HOLDINGS LP

0001581990

2026-05-11

iso4217:USD

xbrli:shares

iso4217:USD

xbrli:shares

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

11, 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)

Registrant’s

telephone number, including area code: 713-646-4100

(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

Common Units

PAA

Nasdaq

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405

of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

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 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of

Certain Officers.

May 11, 2026, the board of directors (the “Board”) of Plains All American Pipeline, L.P.’s (the “Registrant”)

general partner, PAA GP Holdings LLC (the “Company”), appointed Cynthia B. Taylor as an independent member of the Board serving

in Class III. Ms. Taylor will also serve as a member of the Compensation Committee and the Health, Safety, Environmental and Sustainability

Committee. The Board has responsibility for managing the business and affairs of the Registrant and of Plains GP Holdings, L.P.

(“PAGP”).

Ms. Taylor has over 30 years

of energy industry experience, most recently serving as Chief Executive Officer and President of Oil States International, Inc. and as

a member of the Oil States Board of Directors. She held these positions from May 2007 until her retirement from Oil States in May 2026.

From May 2006 until May 2007, Ms. Taylor served as President and Chief Operating Officer of Oil States and served as Senior Vice President—Chief

Financial Officer and Treasurer prior to that. From August 1999 to May 2000, Ms. Taylor was the Chief Financial Officer of L.E. Simmons

& Associates, Incorporated. Ms. Taylor served as the Vice President—Controller of Cliffs Drilling Company from July 1992

to August 1999 and held various management positions with Ernst & Young LLP, a public accounting firm, from January 1984 to July 1992.

Ms. Taylor was a director of the Federal Reserve Bank of Dallas from January 2020 through December 31, 2025 and served as a director

of the Federal Reserve Bank's Houston Branch from 2018 to 2019. She has also served as a director of AT&T Inc. since 2013 and serves

as chair of the AT&T audit committee. She received a B.B.A. in Accounting from Texas A&M University and is a Certified Public Accountant.

Consistent with our compensation

program for non-employee directors, Ms. Taylor will receive an annual cash retainer of $120,000 for service as a Board member. She will

also receive an annual grant of phantom Class A Shares of PAGP having a market value on the date of grant equal to approximately $160,000

(based on a volume weighted average price for the 10-trading day period beginning five days before and ending five days after the ex-dividend

date immediately preceding the date of grant). These annual grants will vest (become payable in Class A Shares of PAGP) one year from

the date of grant and include associated distribution equivalent rights.

Item 7.01. Regulation FD Disclosure.

In accordance with General

Instruction B.2 of Form 8-K, the information presented under this Item 7.01 shall not be deemed “filed” for the purpose

of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall

such information be deemed incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of

1934, each as amended.

On May 11, 2026, the Registrant

issued a press release announcing the appointment of Ms. Taylor to the Board of the Company. A copy of the press release is furnished

as Exhibit 99.1 hereto.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

Exhibit 99.1 –

Press Release dated May 11, 2026.

104

Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 13, 2026

By:

PAA GP Holdings LLC, its general partner

By:

/s/ Richard

McGee

Name:

Richard McGee

Title:

Executive Vice President

EX-99.1 — EXHIBIT 99.1

EX-99.1

Filename: tm2614304d2_ex99-1.htm · Sequence: 2

Exhibit

99.1

Plains

All American Pipeline, L.P. and Plains GP Holdings Announce

Appointment of New Board Member

HOUSTON,

May 11, 2026 - Plains All American Pipeline, L.P. (Nasdaq: PAA) and Plains GP Holdings (Nasdaq: PAGP) today announced

that Cynthia B. Taylor has been appointed as an independent member of the Board of Directors of PAA GP Holdings LLC (“GP Holdings”)

serving in Class III. Ms. Taylor will also serve as a member of the Compensation Committee and the Health, Safety, Environmental

and Sustainability Committee. The GP Holdings Board has responsibility for managing the business and affairs of PAA and PAGP.

“We

are pleased to welcome Cindy to our Board,” said CEO Willie Chiang. “With over 30 years of experience in the energy sector,

including 19 years as CEO and President of Oil States International, Inc., a globally diversified manufacturing and energy services

provider based in Houston, Texas, Cindy has a wealth of operational, financial, strategic planning and executive leadership expertise.

We believe that her public company executive leadership skills and her strategic, operational and financial background in the energy

industry will bring a valuable perspective to the Board. We look forward to working with Cindy on our Board.”

Ms. Taylor

has over 30 years of energy industry experience, most recently serving as Chief Executive Officer and President of Oil States International, Inc.

and as a member of the Oil States Board of Directors. She held these positions from May 2007 until her retirement from Oil States

in May 2026. From May 2006 until May 2007, Ms. Taylor served as President and Chief Operating Officer of Oil States

and served as Senior Vice President—Chief Financial Officer and Treasurer prior to that. From August 1999 to May 2000,

Ms. Taylor was the Chief Financial Officer of L.E. Simmons & Associates, Incorporated. Ms. Taylor served as the

Vice President—Controller of Cliffs Drilling Company from July 1992 to August 1999 and held various management positions

with Ernst & Young LLP, a public accounting firm, from January 1984 to July 1992. Ms. Taylor was a director of

the Federal Reserve Bank of Dallas from January 2020 through December 31, 2025 and served as a director of the Federal

Reserve Bank's Houston Branch from 2018 to 2019. She has also served as a director of AT&T Inc. since 2013 and serves as chair of

the AT&T audit committee. She received a B.B.A. in Accounting from Texas A&M University and is a Certified Public Accountant.

PAA

is a publicly traded master limited partnership that owns and operates midstream energy infrastructure and provides logistics services

for crude oil and natural gas liquids ("NGL"). PAA owns an extensive network of pipeline gathering and transportation systems,

in addition to terminalling, storage, processing, fractionation and other infrastructure assets serving key producing basins, transportation

corridors and major market hubs and export outlets in the United States and Canada. On average, PAA handles more than nine million barrels

per day of crude oil and NGL.

PAGP

is a publicly traded entity that owns an indirect, non-economic controlling general partner interest in PAA and an indirect limited partner

interest in PAA, one of the largest energy infrastructure and logistics companies in North America.

PAA

and PAGP are headquartered in Houston, Texas. For more information, please visit www.plains.com.

Investor

Relations Contacts:

Blake

Fernandez

Ross

Hovde

PlainsIR@plains.com

(866)

809-1291

GRAPHIC

Filename: tm2614304d2_ex99-1img01.jpg · Sequence: 6

Binary file (5532 bytes)

Download tm2614304d2_ex99-1img01.jpg

XML — IDEA: XBRL DOCUMENT

XML

Filename: R1.htm · Sequence: 8

v3.26.1

Cover

May 11, 2026

Cover [Abstract]

Document Type

8-K

Amendment Flag

false

Document Period End Date

May 11, 2026

Entity File Number

1-36132

Entity Registrant Name

PLAINS GP HOLDINGS LP

Entity Central Index Key

0001581990

Entity Tax Identification Number

90-1005472

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

77002

City Area Code

713

Local Phone Number

646-4100

Written Communications

false

Soliciting Material

false

Pre-commencement Tender Offer

false

Pre-commencement Issuer Tender Offer

false

Title of 12(b) Security

Common Units

Trading Symbol

PAA

Security Exchange Name

NASDAQ

Entity Emerging Growth Company

false

- Definition

Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

+ References

No definition available.

+ Details

Name:

dei_AmendmentFlag

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Area code of city

+ References

No definition available.

+ Details

Name:

dei_CityAreaCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Cover page.

+ References

No definition available.

+ Details

Name:

dei_CoverAbstract

Namespace Prefix:

dei_

Data Type:

xbrli:stringItemType

Balance Type:

Period Type:

duration

- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

Name:

dei_DocumentPeriodEndDate

Namespace Prefix:

dei_

Data Type:

xbrli:dateItemType

Balance Type:

Period Type:

duration

- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

Name:

dei_DocumentType

Namespace Prefix:

dei_

Data Type:

dei:submissionTypeItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine1

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 2 such as Street or Suite number

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine2

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the City or Town

+ References

No definition available.

+ Details

Name:

dei_EntityAddressCityOrTown

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

Name:

dei_EntityAddressPostalZipCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the state or province.

+ References

No definition available.

+ Details

Name:

dei_EntityAddressStateOrProvince

Namespace Prefix:

dei_

Data Type:

dei:stateOrProvinceItemType

Balance Type:

Period Type:

duration

- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityCentralIndexKey

Namespace Prefix:

dei_

Data Type:

dei:centralIndexKeyItemType

Balance Type:

Period Type:

duration

- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityEmergingGrowthCompany

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:

dei_EntityFileNumber

Namespace Prefix:

dei_

Data Type:

dei:fileNumberItemType

Balance Type:

Period Type:

duration

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:

dei_EntityIncorporationStateCountryCode

Namespace Prefix:

dei_

Data Type:

dei:edgarStateCountryItemType

Balance Type:

Period Type:

duration

- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityRegistrantName

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityTaxIdentificationNumber

Namespace Prefix:

dei_

Data Type:

dei:employerIdItemType

Balance Type:

Period Type:

duration

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

Name:

dei_LocalPhoneNumber

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 13e

-Subsection 4c

+ Details

Name:

dei_PreCommencementIssuerTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14d

-Subsection 2b

+ Details

Name:

dei_PreCommencementTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Title of a 12(b) registered security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b

+ Details

Name:

dei_Security12bTitle

Namespace Prefix:

dei_

Data Type:

dei:securityTitleItemType

Balance Type:

Period Type:

duration

- Definition

Name of the Exchange on which a security is registered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection d1-1

+ Details

Name:

dei_SecurityExchangeName

Namespace Prefix:

dei_

Data Type:

dei:edgarExchangeCodeItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14a

-Subsection 12

+ Details

Name:

dei_SolicitingMaterial

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

Name:

dei_TradingSymbol

Namespace Prefix:

dei_

Data Type:

dei:tradingSymbolItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 230

-Section 425

+ Details

Name:

dei_WrittenCommunications

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration