Montauk Renewables (MNTK) CEO granted 383,183 RSUs, holdings rise to 1.14M shares

Rhea-AI Filing Summary

McClain Sean F reported acquisition or exercise transactions in this Form 4 filing.

Montauk Renewables, Inc. reported that President & CEO Sean F. McClain received a grant of 383,183 Restricted Stock Units (RSUs) of common stock on May 20, 2026. The award is compensation-related, with no cash paid by McClain for these shares.

The RSUs will vest in equal portions on the third, fourth, and fifth anniversaries of the grant date, encouraging longer-term alignment with the company’s performance. Following this grant, McClain directly holds 1,141,172 shares of common stock, including the 383,183 RSUs, each of which will settle into one share upon vesting.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider McClain Sean F

Role President & CEO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	383,183	$0.00	--

Holdings After Transaction: Common Stock — 1,141,172 shares (Direct, null)

Footnotes (1)

1. Represents Restricted Stock Units ("RSUs"). The grant of RSUs shall vest ratably on the third, fourth and fifth anniversary of date of grant. Each RSU is settled solely for one share of Common Stock. Includes 383,183 RSUs.

Key Figures

RSU grant size: 383,183 RSUs Grant price: $0.0000 per share Post-grant holdings: 1,141,172 shares +2 more

5 metrics

RSU grant size 383,183 RSUs Grant to President & CEO Sean F. McClain on May 20, 2026

Grant price $0.0000 per share Equity award, no cash paid by insider

Post-grant holdings 1,141,172 shares Total common stock directly held after RSU grant

Vesting schedule 3rd, 4th, 5th anniversaries RSUs vest ratably over three future anniversaries

Security type Common Stock Underlying security for the RSU grant

Key Terms

Restricted Stock Units ("RSUs"), vest ratably, transaction code "A", Form 4

4 terms

Restricted Stock Units ("RSUs") financial

"Represents Restricted Stock Units ("RSUs"). The grant of RSUs shall vest ratably..."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

vest ratably financial

"The grant of RSUs shall vest ratably on the third, fourth and fifth anniversary..."

transaction code "A" regulatory

"transaction_code": "A", "transaction_code_description": "Grant, award, or other acquisition""

Form 4 regulatory

"INSIDER FILING DATA (Form 4): { "issuerName": "Montauk Renewables, Inc."..."

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.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 05/22/2026 - 04:55 PM Accepted by SEC EDGAR 05/22/2026 - 04:55 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^*

McClain Sean F

(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
X	Officer (give title below)		Other (specify below)
	President & CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026

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	05/20/2026		A(1)		383,183	A	$0.00	1,141,172(2)	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. Represents Restricted Stock Units ("RSUs"). The grant of RSUs shall vest ratably on the third, fourth and fifth anniversary of date of grant. Each RSU is settled solely for one share of Common Stock.

2. Includes 383,183 RSUs.

	/s/ John Ciroli, by Power of Attorney	05/22/2026
	** 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 for Sean F. McClain?

Montauk Renewables reported that President & CEO Sean F. McClain received a grant of 383,183 Restricted Stock Units. These RSUs represent stock-based compensation, not an open-market purchase, and will convert into common shares as they vest over future years.

How many Montauk Renewables (MNTK) shares does Sean F. McClain hold after this Form 4?

After the RSU grant, Sean F. McClain holds 1,141,172 shares of Montauk Renewables common stock directly. This total includes the 383,183 RSUs, which each settle into one share of common stock when they vest over the specified schedule.

What are the vesting terms of Sean F. McClain’s RSU grant at Montauk Renewables (MNTK)?

The 383,183 Restricted Stock Units granted to Sean F. McClain vest ratably on the third, fourth, and fifth anniversaries of the grant date. Each RSU will be settled solely for one share of Montauk Renewables common stock as those vesting milestones are reached.

Did Sean F. McClain buy or sell Montauk Renewables (MNTK) shares on the open market?

The Form 4 shows a grant of Restricted Stock Units to Sean F. McClain, not an open-market buy or sell. The transaction code is “A,” indicating a grant or award acquisition as part of compensation, with a transaction price of $0.0000 per share.

What does the Form 4 transaction code “A” mean for Montauk Renewables (MNTK)?

The transaction code “A” on the Form 4 indicates a grant, award, or other acquisition of securities. For Montauk Renewables, it reflects RSUs granted to CEO Sean F. McClain as equity compensation rather than a purchase or sale executed in the public market.