Director Amron adds Mammoth Energy (TUSK) shares in open-market buys

Rhea-AI Filing Summary

Mammoth Energy Services director Arthur H. Amron reported buying a total of 4,500 shares of common stock in open-market transactions. He purchased 2,500 shares at a weighted average price of about $3.2199 per share and 2,000 shares at about $3.28 per share. After these purchases, he directly owns 67,135 shares of Mammoth Energy Services common stock.

Insider Trade Summary

Net Buyer: 4,500 shares ($14,610)

Net Buy 2 txns

Insider Amron Arthur H

Role null

Bought 4,500 shs ($15K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	2,000	$3.28	$7K
Purchase	Common Stock	2,500	$3.2199	$8K

Holdings After Transaction: Common Stock — 67,135 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares purchased 2026-06-11: 2,500 shares at $3.2199 Shares purchased 2026-06-12: 2,000 shares at $3.28 Total shares purchased: 4,500 shares +2 more

5 metrics

Shares purchased 2026-06-11 2,500 shares at $3.2199 Open-market purchase of common stock

Shares purchased 2026-06-12 2,000 shares at $3.28 Open-market purchase of common stock

Total shares purchased 4,500 shares Net buying across two transactions

Shares held after latest trade 67,135 shares Direct ownership after 2026-06-12 purchase

Net buy direction 4,500-share net buy transactionSummary netBuySellShares

Key Terms

open-market purchase, weighted average purchase price, Form 4, beneficial ownership

4 terms

open-market purchase financial

"transaction_action: "open-market purchase""

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

weighted average purchase price financial

"The price reported in Column 4 is a weighted average purchase price."

The weighted average purchase price is the average cost per share you paid across multiple buys, calculated so larger purchases count more than smaller ones. Imagine buying apples at different prices: the overall price you effectively paid depends on how many apples you bought at each price. Investors use it to measure true cost basis, calculate gains or losses, decide when to sell, and manage taxes and portfolio performance.

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

beneficial ownership regulatory

"full information regarding the number of shares purchased at each separate price."

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

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Form 4 Insider Transactions: What Each Field Means →

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^*

Amron Arthur H

(Last) (First) (Middle)

14201 CALIBER DRIVE

SUITE 300

(Street)

OKLAHOMA CITY OKLAHOMA 73134

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MAMMOTH ENERGY SERVICES, INC. [ TUSK ]

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)
06/11/2026

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	06/11/2026		P		2,500	A	$3.2199(1)	65,135	D
Common Stock	06/12/2026		P		2,000	A	$3.28(1)	67,135	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:

1. The price reported in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices within a range. The reporting person undertakes to provide to Mammoth Energy Services, Inc., any security holder of Mammoth Energy Services, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

Remarks:

	/s/ Arthur Amron	06/15/2026
	** 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)

FAQ

What insider activity did TUSK director Arthur H. Amron report on this Form 4?

Arthur H. Amron reported open-market purchases of Mammoth Energy Services common stock. He bought a total of 4,500 shares over two days, reflecting increased direct ownership rather than a sale or option exercise transaction.

How many Mammoth Energy (TUSK) shares did Arthur H. Amron buy and at what prices?

Arthur H. Amron bought 2,500 shares at a weighted average price of about $3.2199 and 2,000 shares at about $3.28. These were open-market transactions, as indicated by the purchase transaction code "P" in the filing.

What is Arthur H. Amron’s total Mammoth Energy (TUSK) shareholding after these trades?

Following the reported purchases, Arthur H. Amron directly holds 67,135 shares of Mammoth Energy Services common stock. This figure reflects his position after the most recent open-market transaction disclosed in the Form 4.

Were the TUSK insider purchases by Arthur H. Amron open-market transactions?

Yes. The Form 4 classifies both trades with transaction code "P" and describes them as open-market purchases. This means Amron bought the shares in the public market rather than receiving them as compensation or through option exercises.

Does the Form 4 for TUSK specify exact prices for each share Arthur H. Amron bought?

The filing reports weighted average purchase prices for each trading date, not every individual trade price. It notes that shares were purchased in multiple transactions within a price range and offers to provide full price details upon request.