[Form 4] Plains GP Holdings, L.P. Insider Trading Activity

Rhea-AI Filing Summary

Greg L. Armstrong, identified as a Director of Plains GP Holdings L.P. (PAGP), filed a Form 4 reporting a transaction on 08/11/2025 involving 100,000 Class A shares with transaction code G. The form lists a price of $0 and shows beneficial ownership of 1,765,812 shares following the reported transaction, held directly.

The filing includes no derivative transactions and is signed by Mr. Armstrong on 08/12/2025. His address is shown as Houston, TX.

Positive

• Transaction disclosed: The filing reports 100,000 Class A shares on 08/11/2025 with transaction code G.
• Beneficial ownership reported: 1,765,812 shares held directly following the reported transaction.
• No derivatives listed: Table II for derivative securities is empty.
• Form properly signed: Signature of Greg L. Armstrong dated 08/12/2025 is included.

Negative

• None.

Insights

Financial Analyst

TL;DR: Form 4 reports a 100,000-share Class A transaction and a direct holding of 1,765,812 shares; limited context is provided.

The filing documents a non-derivative transaction dated 08/11/2025 for 100,000 Class A shares under transaction code G. It lists a price of $0 and reports 1,765,812 shares beneficially owned after the transaction, all held directly. No derivative positions are reported in Table II. The form provides clear disclosure of the transaction and resulting stake but contains no additional market or purpose information to evaluate intent or material market impact.

Corporate Governance Expert

TL;DR: Director Greg L. Armstrong properly disclosed the transaction and continuing direct ownership; the filing is signed and dated.

The report identifies the reporting person as Greg L. Armstrong with a Houston, TX address and checks the box indicating his relationship as Director. The Form 4 is signed by Mr. Armstrong on 08/12/2025. Table I records the Class A share transaction and Table II contains no derivative entries. Disclosure format and signature are present, enabling regulatory and investor review of the reported change in beneficial ownership.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

ARMSTRONG GREG L

(Last) (First) (Middle)

333 CLAY STREET

SUITE 1600

(Street)

HOUSTON TX 77002

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
PLAINS GP HOLDINGS LP [ PAGP ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
08/11/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Shares	08/11/2025		G		100,000	D	$0	1,765,812	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Greg L. Armstrong	08/12/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Greg L. Armstrong report on the Form 4 for PAGP?

The Form 4 reports a transaction of 100,000 Class A shares on 08/11/2025 (transaction code G) and lists beneficial ownership after the transaction as 1,765,812 shares, held directly.

What date was the PAGP Form 4 signed by Greg L. Armstrong?

The form is signed by Greg L. Armstrong on 08/12/2025.

Does the filing report any derivative securities for PAGP?

No. Table II (derivative securities) in the filing contains no entries.

What transaction code is shown on the Form 4 and is a price listed?

The transaction code shown is G and the form lists a price of $0 for the reported transaction.

How is Greg L. Armstrong related to Plains GP Holdings (PAGP)?

The filing indicates Greg L. Armstrong's relationship to the issuer as Director.