Steven Sterin - 27 May 2026 Form 4 Insider Report for Kosmos Energy Ltd. (KOS)

Reporting relationship: Director
Issuer ticker: KOS
Reported as of: 27 May 2026
Net transaction value: -$105,476
SEC form: 4
Accepted by SEC: 29 May 2026, 17:01:18 UTC
Prior SEC filing: 26 May 2026
Next SEC filing: 08 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Josh R. Marion, Attorney-in-Fact

Key filing fact

Steven Sterin filed Form 4 for Kosmos Energy Ltd. (KOS) on 29 May 2026.

Key facts

This page summarizes Steven Sterin's Form 4 filing for Kosmos Energy Ltd. (KOS).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 29 May 2026, 17:01.

Change

Previous filing in this sequence was filed on 26 May 2026.
Current net transaction value: -$105,476.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001340482 Primary reporting owner

Sterin Steven

Relationship: Director
Address: 8176 PARK LANE, SUITE 500, DALLAS
Signature: /s/ Josh R. Marion, Attorney-in-Fact
Signature date: 29 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

KOS transaction

Common Stock

Sale

Transaction value: $105,476
Shares: -38,636
Change %: -10%
Price: $2.73
Shares after: 331,295
Date: 27 May 2026
Ownership: Direct
Footnotes: F1

KOS transaction

Common Stock

Award

Transaction value
Shares: +62,044
Change %: +19%
Price: $2.74^*
Shares after: 393,339
Date: 28 May 2026
Ownership: Direct
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

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").

Footnote F2

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.