Kosmos Energy director reports stock grant, sale

Kosmos Energy Ltd. director Grant John Douglas Kelso reported a mix of equity compensation and tax-related trades.

Rhea-AI Filing Summary

Kosmos Energy Ltd. director Grant John Douglas Kelso reported a mix of equity compensation and tax-related trades. He received an award of 62,044 common shares at $2.74 per share. On the prior day, he sold 43,466 shares at $2.73 and had 735 shares withheld to cover taxes from restricted share unit vesting. Following these transactions, he directly holds 144,355 common shares. The newly granted restricted share units are scheduled to vest 100% on the earlier of May 28, 2027 or the day before the company’s first annual shareholder meeting after the grant date.

Insider Trade Summary

Net Seller: 43,466 shares

Net Sell 3 txns

Insider Grant John Douglas Kelso

Role Director

Sold 43,466 shs ($119K)

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	62,044	$2.74	$170K
Exercise Price or Tax Liability	Common Stock	735	$2.85	$2K
Sale	Common Stock	43,466	$2.73	$119K

Holdings After Transaction: Common Stock — 144,355 shares (Direct)

Footnotes (3)

1. F1. These shares were withheld by the Issuer to satisfy the tax withholding requirement arising from the vesting of restricted share units granted to the reporting person under the Issuer's Long Term Incentive Plan (the "Plan").
2. F2. These shares were sold to partially cover income tax liability from the vesting of restricted share units granted to the reporting person under the Plan.
3. F3. These restricted share units were granted under the Plan and are scheduled to vest 100% on the earlier of May 28, 2027 or the day immediately preceding the date of the Issuer's first annual shareholder meeting following the date of grant, subject to the terms of the Plan and the applicable award agreement issued thereunder.

Key Figures

Equity award: 62,044 shares at $2.74 Shares sold: 43,466 shares at $2.73 Tax withholding shares: 735 shares at $2.85 +3 more

6 metrics

Equity award 62,044 shares at $2.74 Common stock grant/award on May 28, 2026

Shares sold 43,466 shares at $2.73 Open-market sale on May 27, 2026

Tax withholding shares 735 shares at $2.85 Withheld to satisfy tax from RSU vesting

Post-transaction holdings 144,355 shares Common stock directly owned after transactions

Tax-related sale shares 43,466 shares Sold to partially cover income tax liability

Tax withholding count 735 shares Shares withheld for tax obligations

Key Terms

restricted share units, Long Term Incentive Plan, open-market sale, tax withholding requirement, +1 more

5 terms

restricted share units financial

"the vesting of restricted share units granted to the reporting person under the Issuer's Long Term Incentive Plan"

Restricted share units (RSUs) are a promise from a company to give an employee or service provider actual shares or cash equal to the shares after certain conditions are met, typically staying with the company for a set time or hitting performance targets. Think of them like a time-locked gift card that becomes usable only after you’ve earned it. For investors, RSUs matter because they align employee incentives with company performance and can increase the number of shares outstanding over time, diluting existing ownership and affecting earnings per share.

Long Term Incentive Plan financial

"granted to the reporting person under the Issuer's Long Term Incentive Plan (the "Plan")"

A long term incentive plan is a company program that awards executives and key employees bonuses—often in stock, options, or cash—only if the business meets multi-year performance goals. It links management pay to company results—like tying a coach’s bonus to a team’s multi-season record—so investors monitor it for how leaders are motivated, potential share dilution, and signals about the company’s long-term priorities.

open-market sale financial

"Sale in open market or private transaction"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

tax withholding requirement financial

"withheld by the Issuer to satisfy the tax withholding requirement arising from the vesting"

income tax liability financial

"sold to partially cover income tax liability from the vesting of restricted share units"

FAQ

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

What did Kosmos Energy (KOS) director Grant Kelso acquire in this Form 4?

Grant Kelso received an award of 62,044 shares of Kosmos Energy common stock at $2.74 per share. The award reflects equity compensation tied to restricted share units that vest in the future under the company’s Long Term Incentive Plan.

How many Kosmos Energy (KOS) shares did Grant Kelso sell and at what price?

Grant Kelso sold 43,466 shares of Kosmos Energy common stock at $2.73 per share. According to the disclosure, these shares were sold to partially cover income tax liabilities arising from the vesting of restricted share units previously granted.

Why were additional Kosmos Energy (KOS) shares withheld from Grant Kelso?

An additional 735 shares of Kosmos Energy common stock were withheld by the company at $2.85 per share. This withholding satisfied tax obligations triggered by the vesting of restricted share units granted under the company’s Long Term Incentive Plan.

How many Kosmos Energy (KOS) shares does Grant Kelso hold after these transactions?

After the reported transactions, Grant Kelso directly holds 144,355 shares of Kosmos Energy common stock. This total reflects the recent equity award, the open-market sale to cover taxes, and the separate share withholding for tax obligations on vested restricted share units.

When do Grant Kelso’s new restricted share units in Kosmos Energy (KOS) vest?

The newly granted restricted share units are scheduled to vest 100% on the earlier of May 28, 2027 or the day immediately before Kosmos Energy’s first annual shareholder meeting after the grant date, subject to the plan and award agreement terms.

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

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Accepted by SEC EDGAR 05/29/2026 - 05:03 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^*

Grant John Douglas Kelso

(Last) (First) (Middle)

8176 PARK LANE, SUITE 500

(Street)

DALLAS TEXAS 75231

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Kosmos Energy Ltd. [ KOS ]

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)
05/27/2026

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	05/27/2026		F		735(1)	D	$2.85	125,777	D
Common Stock	05/27/2026		S		43,466(2)	D	$2.73	82,311	D
Common Stock	05/28/2026		A		62,044(3)	A	$2.74	144,355	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. These shares were withheld by the Issuer to satisfy the tax withholding requirement arising from the vesting of restricted share units granted to the reporting person under the Issuer's Long Term Incentive Plan (the "Plan").

2. These shares were sold to partially cover income tax liability from the vesting of restricted share units granted to the reporting person under the Plan.

3. These restricted share units were granted under the Plan and are scheduled to vest 100% on the earlier of May 28, 2027 or the day immediately preceding the date of the Issuer's first annual shareholder meeting following the date of grant, subject to the terms of the Plan and the applicable award agreement issued thereunder.

Remarks:

	/s/ Josh R. Marion, Attorney-in-Fact	05/29/2026
	** 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)