ProPetro director receives 28,181 shares via RSU vesting

Armour Spencer D III reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Armour Spencer D III reported acquisition or exercise transactions in this Form 4 filing.

Director Spencer D Armour III of ProPetro Holding Corp. reported the vesting and settlement of 28,181 restricted stock units, delivering the same number of common shares as compensation. These RSUs were granted on May 21, 2025 and vested in full under their terms. After receiving the shares, Armour directly holds 145,272 shares of ProPetro common stock. This reflects equity compensation vesting, not an open‑market buy or sale.

Insider Trade Summary

28,181 shares exercised/converted

Exercise 2 txns

Insider Armour Spencer D III

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	28,181	$0.00	$0.00
Exercise	Common Stock	28,181	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 0 contracts (Direct); Common Stock — 145,272 shares (Direct)

Footnotes (3)

1. F1. Reflects shares of common stock of the Issuer ("Common Stock") delivered upon vesting and settlement of previously awarded restricted stock units ("RSUs").
2. F2. Each RSU represents a contingent right to receive either one share of Common Stock or an amount of cash equal to the fair market value of one share of Common Stock.
3. F3. On May 21 2025, the reporting person was granted 28,181 RSUs, vesting in full upon the earlier to occur of the day immediately preceding the Issuer's annual meeting of stockholders in 2026 and May 21, 2026.

Key Figures

RSUs settled: 28,181 units Common shares received: 28,181 shares Post-transaction holdings: 145,272 shares +1 more

4 metrics

RSUs settled 28,181 units Restricted Stock Units converting into common stock on May 18, 2026

Common shares received 28,181 shares Shares delivered upon RSU vesting and settlement

Post-transaction holdings 145,272 shares Common stock directly held by Armour after the transaction

RSU grant date and size 28,181 RSUs on May 21, 2025 Equity award vesting in connection with 2026 annual meeting timing

Key Terms

Restricted Stock Units, RSUs, derivative security, vesting and settlement

4 terms

Restricted Stock Units financial

"Reflects shares of common stock ... upon vesting and settlement of previously awarded restricted stock units ("RSUs")."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

RSUs financial

"On May 21 2025, the reporting person was granted 28,181 RSUs, vesting in full upon the earlier to occur..."

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

derivative security financial

"transaction_code_description: "Exercise or conversion of derivative security""

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

vesting and settlement financial

"delivered upon vesting and settlement of previously awarded restricted stock units ("RSUs")."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did ProPetro (PUMP) director Spencer D Armour III report?

Spencer D Armour III reported the vesting and settlement of restricted stock units into common shares. On May 18, 2026, 28,181 RSUs converted into 28,181 ProPetro common shares as part of his equity compensation, rather than through an open-market trade.

How many ProPetro (PUMP) shares did Spencer D Armour III receive in this Form 4 filing?

He received 28,181 shares of ProPetro common stock. These shares were delivered upon vesting and settlement of an equal number of previously awarded restricted stock units, reflecting equity compensation rather than a cash purchase of stock in the market.

How many ProPetro (PUMP) shares does Spencer D Armour III hold after this transaction?

Following the RSU vesting, Armour directly holds 145,272 shares of ProPetro common stock. This total includes the 28,181 new shares delivered upon settlement of the restricted stock units reported in this Form 4 insider transaction.

Were any ProPetro (PUMP) shares bought or sold on the market in this Form 4?

No market purchases or sales were reported. The Form 4 shows an “M” code exercise, where 28,181 restricted stock units settled into 28,181 common shares as compensation, without an open-market buy or sell transaction taking place.

What are the terms of the ProPetro (PUMP) restricted stock units granted to Armour?

On May 21, 2025, Armour was granted 28,181 RSUs. Each RSU represents a contingent right to receive either one ProPetro common share or cash equal to its fair market value, vesting in full based on the issuer’s 2026 annual meeting timing.

What does the transaction code “M” mean in this ProPetro (PUMP) Form 4?

The “M” code indicates an exercise or conversion of a derivative security. Here, it reflects the vesting and settlement of 28,181 restricted stock units into the same number of ProPetro common shares, treated as equity compensation rather than an open-market transaction.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/19/2026 - 05:58 PM Learn about SEC filing dates

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^*

Armour Spencer D III

(Last) (First) (Middle)

ONE MARIENFELD PLACE

110 N. MARIENFELD STREET, SUITE 300

(Street)

MIDLAND TEXAS 79701

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ProPetro Holding Corp. [ PUMP ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/18/2026

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

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

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

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
Common Stock	05/18/2026		M		28,181(1)	A	(2)	145,272	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
Restricted Stock Units	(2)	05/18/2026		M			28,181	(3)	(3)	Common Stock	28,181	$0	0	D

Explanation of Responses:

1. Reflects shares of common stock of the Issuer ("Common Stock") delivered upon vesting and settlement of previously awarded restricted stock units ("RSUs").

2. Each RSU represents a contingent right to receive either one share of Common Stock or an amount of cash equal to the fair market value of one share of Common Stock.

3. On May 21 2025, the reporting person was granted 28,181 RSUs, vesting in full upon the earlier to occur of the day immediately preceding the Issuer's annual meeting of stockholders in 2026 and May 21, 2026.

Remarks:

	/s/ John J. Mitchell, as attorney-in-fact for Spencer D. Armour III	05/19/2026
	** 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.
* Form 4: SEC 1474 (03-26)