Kosmos Energy Ltd. SEC Filings

An insider has filed a Rule 144 notice to sell 1430084 common shares of the KOS issuer. The shares are expected to be sold on or about 12/18/2025 through broker Coutts & Co on the NYSE, with an aggregate market value indicated as 1420931.00. The filing states that 478326954 shares of the same class were outstanding.

The securities to be sold were acquired on 12/18/2025 through restricted stock vesting from the issuer as compensation, rather than a cash purchase. By signing the notice, the seller represents that they are not aware of any undisclosed material adverse information about the issuer’s current or prospective operations.

A holder of KOS common stock filed a notice of intent to sell 7,787 shares through broker Coutts & Co on the NYSE, with an aggregate market value of $7,163.00. These shares are part of a much larger base of 478,326,954 common shares outstanding.

The shares to be sold were acquired on 12/17/2025 from the issuer via restricted stock vesting as compensation, with payment also dated 12/17/2025. The seller represents that they are not aware of any undisclosed material adverse information about the issuer’s current or prospective operations.

Grantham, Mayo, Van Otterloo & Co. LLC (GMO) filed Amendment No. 3 to Schedule 13G, reporting a passive stake in Kosmos Energy Ltd. (KOS).

GMO beneficially owns 34,780,967 shares of Kosmos Energy common stock, representing 7.27% of the class as of the event date 09/30/2025. GMO reports sole voting power and sole dispositive power over 34,780,967 shares, with no shared voting or dispositive power.

The filer certified the securities were acquired and are held in the ordinary course of business and not to change or influence control.

Kosmos Energy (KOS) reported a Q3 2025 net loss of $124.3 million on oil and gas revenue of $311.0 million. Year‑to‑date, revenue was $995.2 million with a net loss of $322.6 million. Operating cash flow fell to $98.7 million for the nine months, reflecting lower realized prices, delayed Jubilee cargoes, and pre‑production and early ramp‑up costs tied to Greater Tortue Ahmeyim (GTA) Phase 1. Cash and cash equivalents were $64.0 million, with total debt principal of $3.03 billion, including $1.125 billion drawn on the Facility and $225 million undrawn availability.

In July, lenders amended the Facility’s debt cover ratio to a maximum of 4.0x for September 2025 and 4.25x for March 2026, reverting to 3.50x thereafter. Management notes circumstances under which the company may not meet the covenant at the March and September 2026 assessment dates and outlined a mitigation plan to reduce TEN operating and corporate costs and potentially monetize hedges. In October, Kosmos funded a $150 million Gulf of America secured term loan and redeemed $150 million of 7.125% notes. Shares outstanding were 478,326,954 as of October 30, 2025.

Kosmos Energy Ltd. furnished a Form 8-K to announce that it issued a news release with results for the fiscal quarter ended September 30, 2025.

The news release is provided as Exhibit 99.1 and is incorporated by reference. The company states the information is being furnished and is not deemed “filed” for purposes of Section 18 of the Exchange Act.

Kosmos Energy Ltd. filed a Form 8-K reporting a conditional notice of partial redemption for $150,000,000 principal amount of its 7.125% senior notes due 2026. The notice was issued on September 25, 2025 and the company states that redemption of the specified notes will occur on October 6, 2025. The filing references Item 1.01 in relation to Item 2.03 but does not include additional details about funding source, remaining outstanding principal, or the specific terms of the redemption beyond the principal amount, coupon and redemption date.

Kosmos Energy Ltd. reports that Chief Commercial Officer Christopher J. Ball has decided to retire, effective September 30, 2025. His commercial responsibilities will transition to Chief Financial Officer Neal D. Shah, who will assume oversight of the company’s commercial matters.

After retirement, Mr. Ball will provide advisory services under an Advisory Agreement, earning $3,000 per day when he works, plus expense reimbursement. In connection with the advisory and transition arrangements, he will also receive a portion of his 2025 target annual bonus, prorated through his retirement date. The advisory arrangement continues until terminated by either party, and the full agreements will be filed as exhibits to the Form 10-Q for the quarter ending September 30, 2025.

Kosmos Energy Ltd. is the subject of a joint Schedule 13G filing by American Century Investment Management, Inc., American Century Companies, Inc. and Stowers Institute for Medical Research reporting beneficial ownership of 33,411,046 shares, representing 7.0% of the outstanding common stock. The filing shows sole voting power for 30,486,885 shares and sole dispositive power for 33,411,046 shares, indicating the filers exercise direct control over voting and disposition of the reported shares.

The filing notes that ACIM acts as an investment adviser and is a wholly owned subsidiary of ACC controlled by Stowers Institute, and includes a certification that the securities are held in the ordinary course of business and not for the purpose of changing or influencing control. The parties have consented to a joint filing for these holdings.

Hotchkis and Wiley Capital Management, LLC reports beneficial ownership of 21,210,674 Kosmos Energy common shares, representing 4.44% of the outstanding class. The filing shows sole voting power over 19,135,974 shares and sole dispositive power over 21,210,674 shares, and notes some clients retain voting power so the adviser can dispose of more shares than it can vote.

The filer is identified as a Delaware investment adviser and certifies the shares were acquired and are held in the ordinary course of business and not for the purpose of influencing control of the issuer. This disclosure is reported on Schedule 13G/A as a passive ownership position.