Director-linked entity boosts Montauk Renewables (MNTK) stake with 17,506-share buy

Rhea-AI Filing Summary

Montauk Renewables director-related entity buys shares on the open market. An entity associated with director John A. Copelyn, Rivetprops 47 (PTY) Ltd., purchased 17,506 shares of Montauk Renewables common stock in an open-market transaction at $1.45 per share. Following this transaction, Rivetprops holds 17,506 shares indirectly for which Mr. Copelyn is deemed to have voting and investment power. The trade was denominated in South African rand, with a per-share price of ZAR 23.86 converted using a South African Reserve Bank exchange rate.

Insider Trade Summary

Net Buyer: 17,506 shares ($25,384)

Net Buy 1 txn

Insider Copelyn John A

Role null

Bought 17,506 shs ($25K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	17,506	$1.45	$25K

Holdings After Transaction: Common Stock — 17,506 shares (Indirect, See Footnote)

Footnotes (1)

1. The underlying transaction was denominated in South African rand ("ZAR"). The amount reported in United States Dollars ("USD") has been converted from ZAR using the South African Reserve Bank exchange rate in effect on the transaction date of 16.4093 ZAR to 1 USD. The per share purchase price was ZAR 23.86. These shares of common stock, par value $0.01 ("Common Stock"), of Montauk Renewables, Inc. (the "Issuer") are owned directly by Rivetprops 47 (PTY) Ltd. ("Rivetprops") and indirectly by Mr. Copelyn. Mr. Copelyn is a member of the board of directors of Rivetprops and is deemed to have voting and investment power with respect to the shares of Common Stock held by Rivetprops.

Key Figures

Shares purchased: 17,506 shares Purchase price: $1.45 per share Indirect holdings after trade: 17,506 shares +2 more

5 metrics

Shares purchased 17,506 shares Open-market purchase of common stock

Purchase price $1.45 per share Reported U.S. dollar price for the transaction

Indirect holdings after trade 17,506 shares Total common shares held indirectly following transaction

ZAR per-share price ZAR 23.86 Local currency purchase price per share

FX rate used 16.4093 ZAR to 1 USD South African Reserve Bank rate on transaction date

Key Terms

open-market purchase, indirect ownership, South African rand, voting and investment power, +1 more

5 terms

open-market purchase financial

"transaction_action: "open-market purchase" for common stock"

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.

indirect ownership financial

"ownership_type is reported as "indirect" with nature of ownership via entity"

South African rand financial

"The underlying transaction was denominated in South African rand ("ZAR")."

voting and investment power financial

"Mr. Copelyn is deemed to have voting and investment power with respect to the shares"

common stock financial

"These shares of common stock, par value $0.01 ("Common Stock"), of Montauk Renewables"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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^*

Copelyn John A

(Last) (First) (Middle)

5313 CAMPBELLS RUN ROAD, SUITE 200

(Street)

PITTSBURGH PENNSYLVANIA 15205

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Montauk Renewables, Inc. [ MNTK ]

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)
05/11/2026

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	05/11/2026		P		17,506	A	$1.45(1)	17,506	I	See Footnote(2)

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 underlying transaction was denominated in South African rand ("ZAR"). The amount reported in United States Dollars ("USD") has been converted from ZAR using the South African Reserve Bank exchange rate in effect on the transaction date of 16.4093 ZAR to 1 USD. The per share purchase price was ZAR 23.86.

2. These shares of common stock, par value $0.01 ("Common Stock"), of Montauk Renewables, Inc. (the "Issuer") are owned directly by Rivetprops 47 (PTY) Ltd. ("Rivetprops") and indirectly by Mr. Copelyn. Mr. Copelyn is a member of the board of directors of Rivetprops and is deemed to have voting and investment power with respect to the shares of Common Stock held by Rivetprops.

	JOHN A. COPELYN, /s/ John Ciroli, by Power of Attorney	05/13/2026
	** 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 transaction did Montauk Renewables (MNTK) report in this Form 4?

Montauk Renewables reported an indirect open-market share purchase. An entity associated with director John A. Copelyn bought 17,506 common shares at $1.45 per share, resulting in indirect ownership of 17,506 shares after the transaction.

How many Montauk Renewables (MNTK) shares were bought and at what price?

The filing shows a purchase of 17,506 common shares. The shares were acquired in an open-market transaction at a reported price of $1.45 per share, with the trade originally denominated in South African rand and then converted to U.S. dollars.

Who effectively controls the shares in the Montauk Renewables (MNTK) Form 4 filing?

The shares are held by Rivetprops 47 (PTY) Ltd. and linked to John A. Copelyn. Rivetprops directly owns the shares, while Mr. Copelyn is deemed to have voting and investment power as a member of Rivetprops’ board.

What currency details are disclosed for the Montauk Renewables (MNTK) insider trade?

The transaction is described in both South African rand and U.S. dollars. The per-share purchase price was ZAR 23.86, converted to U.S. dollars using a South African Reserve Bank exchange rate of 16.4093 ZAR to 1 USD on the transaction date.

Is the Montauk Renewables (MNTK) purchase in the Form 4 a direct or indirect holding?

The holding is reported as indirect ownership. The 17,506 common shares are directly owned by Rivetprops 47 (PTY) Ltd., with John A. Copelyn reported as having voting and investment power over these indirectly held shares.