What are the tax-withholding share dispositions reported by GPOR’s Michael Sluiter?

Two transactions with code F show 838 and 894 Gulfport Energy shares delivered to cover tax obligations. The filing notes these shares came from vested restricted stock units previously granted under the issuer’s equity incentive plan and were withheld at prices above $208 per share.

Gulfport Energy (GPOR) SVP reports share sale, tax withholdings and award

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Gulfport Energy senior vice president of reservoir engineering Michael Sluiter reported several common stock transactions. He received a grant of 2,397 shares of restricted stock under the 2021 Stock Incentive Plan, which will vest in three approximately equal annual installments beginning on March 1, 2027.

On a separate date, he made an open-market sale of 9,933 common shares at a price of $210.00 per share. Two additional transactions were tax-withholding dispositions, where 838 shares at $208.66 per share and 894 shares at $209.13 per share were withheld to cover tax obligations tied to vested restricted stock units. After these transactions, he directly owned 11,086 common shares.

Insights

Executive reported a stock award, an open-market sale, and tax-related share withholdings, resulting in a net reduction of directly held shares.

Michael Sluiter, a senior vice president at Gulfport Energy, reported a grant of 2,397 restricted shares that vest in three annual installments starting on March 1, 2027. This equity award under the 2021 Stock Incentive Plan increases his long-term, performance-linked exposure to the company.

He also completed an open-market sale of 9,933 common shares at $210.00 per share, alongside two tax-withholding dispositions of 838 and 894 shares at prices above $208 per share. These tax-related transactions settled obligations on vested restricted stock units rather than being discretionary sales.

Following all reported activity, his direct holdings stood at 11,086 common shares. The net effect is a reduction in directly held shares despite the new award, with future vesting beginning on March 1, 2027. Overall, the mix of compensation-related awards, tax withholding, and a single open-market sale appears consistent with routine executive equity management.

Insider Trade Summary

Net Seller: 9,933 shares ($2,085,930)

Net Sell 4 txns

Insider SLUITER MICHAEL

Role SVP of Reservoir Engineering

Sold 9,933 shs ($2.09M)

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	894	$209.13	$187K
Sale	Common Stock	9,933	$210.00	$2.09M
Grant/Award	Common Stock	2,397	$0.00	--
Tax Withholding	Common Stock	838	$208.66	$175K

Holdings After Transaction: Common Stock — 11,086 shares (Direct)

Footnotes (1)

Amount represents the number of shares of restricted stock granted under the 2021 Stock Incentive Plan. The shares will vest in three approximately equal annual installments beginning on March 1, 2027. These shares represent vested restricted stock units previously granted to the reporting person under the Issuer's equity incentive plan and were withheld by Gulfport Energy Corporation to satisfy tax withholding obligations due upon settlement of such restricted stock units.

Form 4 Insider Transactions: What Each Field Means →

03/03/2026 - 06:59 PM

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^*

SLUITER MICHAEL

(Last)

(First)

(Middle)

713 MARKET DRIVE

(Street)

OKLAHOMA CITY

73114

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
GULFPORT ENERGY CORP [ GPOR ]

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

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	SVP of Reservoir Engineering

3. Date of Earliest Transaction (Month/Day/Year)
03/01/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	03/01/2026		A		2,397⁽¹⁾	A	$0	22,751	D
Common Stock	03/01/2026		F		838⁽²⁾	D	$208.66	21,913	D
Common Stock	03/02/2026		S		9,933	D	$210	11,980	D
Common Stock	03/03/2026		F		894⁽²⁾	D	$209.13	11,086	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Amount represents the number of shares of restricted stock granted under the 2021 Stock Incentive Plan. The shares will vest in three approximately equal annual installments beginning on March 1, 2027.

2. These shares represent vested restricted stock units previously granted to the reporting person under the Issuer's equity incentive plan and were withheld by Gulfport Energy Corporation to satisfy tax withholding obligations due upon settlement of such restricted stock units.

Remarks:

	/s/ Patrick Craine, Attorney-in-Fact	03/03/2026
	** 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.

Source: View Original Filing on SEC EDGAR

FAQ

What stock transactions did GPOR executive Michael Sluiter report on this Form 4?

He reported four transactions: a grant of 2,397 restricted shares, an open-market sale of 9,933 common shares at $210.00 per share, and two tax-withholding dispositions of 838 and 894 shares related to vested restricted stock units.

What equity award did GPOR grant to Michael Sluiter in this filing?

He received 2,397 shares of restricted stock under Gulfport Energy’s 2021 Stock Incentive Plan. According to the filing, these shares will vest in three approximately equal annual installments beginning on March 1, 2027, subject to the plan’s usual terms and conditions.

How many GPOR shares did Michael Sluiter sell in the open market?

He sold 9,933 shares of Gulfport Energy common stock in an open-market transaction. The sale was reported at a price of $210.00 per share and is separate from the tax-withholding share dispositions described elsewhere in the same Form 4 filing.

How many GPOR shares does Michael Sluiter own after these transactions?

After completing the reported award, sale, and tax-withholding dispositions, Michael Sluiter directly owns 11,086 shares of Gulfport Energy common stock. This total reflects his updated direct beneficial ownership immediately following the last transaction reported in the Form 4.

When will Michael Sluiter’s new GPOR restricted stock award vest?

The 2,397-share restricted stock grant will vest in three approximately equal annual installments. Vesting is scheduled to begin on March 1, 2027, according to the disclosure, with the remaining installments expected on the following two anniversaries under the plan’s standard vesting structure.