Kosmos Energy (KOS) director granted 62,044 shares, sells 38,636 to cover tax

Rhea-AI Filing Summary

Kosmos Energy Ltd. director Steven Sterin reported both a stock grant and a tax-related sale. On May 28, 2026, he acquired 62,044 shares of common stock at $2.74 per share as a grant under the company’s Long Term Incentive Plan.

On May 27, 2026, he sold 38,636 shares of common stock at $2.73 per share. Footnotes explain this sale was made to partially cover income tax liabilities arising from the vesting of restricted share units. After these transactions, Sterin directly holds 393,339 shares of Kosmos Energy common stock.

Insights

Equity compensation analyst

Routine equity grant with tax-cover sale; overall neutral signal.

The filing shows director Steven Sterin receiving 62,044 shares of Kosmos Energy common stock as an equity grant at $2.74 per share, consistent with typical board compensation under a Long Term Incentive Plan.

He also sold 38,636 shares at $2.73 per share, with footnotes stating the sale was to partially cover income tax liabilities from restricted share unit vesting. This characterizes the disposition as a mechanistic tax event rather than a discretionary portfolio move.

Following the transactions, Sterin directly holds 393,339 shares. With no derivative positions reported in this filing and the sale tied to tax obligations, the overall signal from these transactions appears routine and not thesis-changing for investors.

Insider Trade Summary

Net Seller: 38,636 shares ($105,476)

Net Sell 2 txns

Insider Sterin Steven

Role null

Sold 38,636 shs ($105K)

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	62,044	$2.74	$170K
Sale	Common Stock	38,636	$2.73	$105K

Holdings After Transaction: Common Stock — 393,339 shares (Direct, null)

Footnotes (1)

1. These shares were sold to partially cover income tax liability from the vesting of restricted share units granted to the reporting person under the Issuer's Long Term Incentive Plan (the "Plan"). 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 grant: 62,044 shares at $2.74 Tax-related sale: 38,636 shares at $2.73 Post-transaction holdings: 393,339 shares +1 more

4 metrics

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

Tax-related sale 38,636 shares at $2.73 Sale on May 27, 2026 to cover tax liability

Post-transaction holdings 393,339 shares Direct ownership after reported transactions

Net share change (buy vs sell) -38,636 shares Net of buy/sell activity in this filing

Key Terms

restricted share units, Long Term Incentive Plan, income tax liability, vest, +1 more

5 terms

restricted share units financial

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

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.

income tax liability financial

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

vest financial

"restricted share units were granted under the Plan and are scheduled to vest 100% on the earlier of May 28, 2027"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

annual shareholder meeting financial

"vest 100% on the earlier of May 28, 2027 or the day immediately preceding the date of the Issuer's first annual shareholder meeting"

A yearly gathering where a company’s owners (shareholders) and its leaders meet to review performance, approve key decisions like electing directors, and vote on issues such as executive pay or major policy changes. Think of it as an annual town hall for people who own part of the business: investors use it to ask questions, influence direction through votes, and gauge management’s plans and transparency, all of which can affect the stock’s outlook.

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^*

Sterin Steven

(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		S		38,636(1)	D	$2.73	331,295	D
Common Stock	05/28/2026		A		62,044(2)	A	$2.74	393,339	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 sold to partially cover income tax liability from the vesting of restricted share units granted to the reporting person under the Issuer's Long Term Incentive Plan (the "Plan").

2. 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)

FAQ

What insider transactions did Kosmos Energy (KOS) director Steven Sterin report?

Steven Sterin reported receiving a grant of 62,044 Kosmos Energy common shares and selling 38,636 shares. The grant reflects equity compensation, while the sale was disclosed as partially covering income tax liabilities from vesting restricted share units under the Long Term Incentive Plan.

How many Kosmos Energy (KOS) shares did Steven Sterin sell and at what price?

Steven Sterin sold 38,636 Kosmos Energy common shares at a price of $2.73 per share. A footnote clarifies the sale was executed to partially cover income tax liabilities arising from the vesting of restricted share units granted under the company’s Long Term Incentive Plan.

What equity grant did Steven Sterin receive from Kosmos Energy (KOS)?

On May 28, 2026, Steven Sterin received a grant of 62,044 Kosmos Energy common shares at $2.74 per share. These restricted share units were granted under the Long Term Incentive Plan and represent part of his board-level equity compensation package from the company.

What are the vesting terms for Steven Sterin’s new Kosmos Energy (KOS) restricted share units?

The restricted share units are scheduled to vest 100% on the earlier of May 28, 2027, or the day immediately preceding Kosmos Energy’s first annual shareholder meeting following the grant date, subject to the Long Term Incentive Plan and the applicable award agreement terms.

How many Kosmos Energy (KOS) shares does Steven Sterin hold after these transactions?

After the reported grant and sale, Steven Sterin directly holds 393,339 shares of Kosmos Energy common stock. This figure reflects his updated direct ownership position as of the Form 4, incorporating both the equity award and the tax-related share sale disclosed.

Why is Steven Sterin’s sale of Kosmos Energy (KOS) shares considered tax-related?

A footnote explains the 38,636 shares were sold to partially cover income tax liability from the vesting of restricted share units. Such transactions are typically mechanical, reflecting tax obligations on equity compensation rather than a discretionary view on the company’s share price.