Kosmos Energy Ltd.
KOS- Exchange
- NYSE
- Industry
- Crude Petroleum & Natural Gas
- SEC CIK
- 0001509991
No open-market purchases or sales by Kosmos Energy Ltd. insiders were filed in the last 90 days; 269 institutions reported holding it in 13F filings for Q2 2026, worth $909.2M in total; no superinvestor holds it.
Holders of 5% or more of KOS
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Kosmos Energy Ltd., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 8.10%47.9M shares | +1.40 ppfrom 6.70% | Feb 5, 20254 filings | Jul 29, 2026 | SEC |
| State Street Corp | 13G | 5.40%32.1M shares | – | Feb 3, 20233 filings | Nov 10, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
51 Schedule 13D and 13G filings on Kosmos Energy Ltd., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Nov 10, 20268:29 AM ET | State Street Corp | 13G | 5.40%32.1M shares | – | Sep 30, 2026 | SEC |
| Nov 6, 20267:12 AM ET | cobas asset management, sgiic, s.a. | 13G | 4.90%29.4M shares | −0.30 ppfrom 5.20%Below 5% | Oct 28, 2026 | SEC |
| Jul 29, 20263:19 PM ET | BlackRock, Inc. | 13G/A | 8.10%47.9M shares | +1.40 ppfrom 6.70% | Jun 30, 2026 | SEC |
| May 1, 20261:25 PM ET | Grantham, Mayo, Van Otterloo & Co. LLC | 13G/A | 3.16%18.3M shares | −4.11 ppfrom 7.27%Below 5% | Mar 31, 2026 | SEC |
| Apr 24, 20264:11 PM ET | BlackRock, Inc. | 13G/A | 6.70%39.8M shares | −1.20 ppfrom 7.90% | Mar 31, 2026 | SEC |
| Feb 13, 20269:58 AM ET | American Century Investment Management Incand 2 others | 13G/A | 2.40%11.3M shares | −4.60 ppfrom 7.00%Below 5% | Dec 31, 2025 | SEC |
| Jan 21, 202612:26 PM ET | BlackRock Portfolio Management LLC | 13G/A | 1.70%8.29M shares | −4.60 ppfrom 6.30%Below 5% | Dec 31, 2025 | SEC |
| Nov 5, 20251:42 PM ET | Grantham, Mayo, Van Otterloo & Co. LLC | 13G/A | 7.27%34.8M shares | −1.07 ppfrom 8.34% | Sep 30, 2025 | SEC |
| Aug 14, 20259:07 AM ET | American Century Investment Management Incand 2 others | 13G/A | 7.00%33.4M shares | – | Jun 30, 2025 | SEC |
| Aug 13, 20258:52 PM ET | Hotchkis & Wiley Capital Management LLC | 13G/A | 4.44%21.2M shares | −0.90 ppfrom 5.34%Below 5% | Jun 30, 2025 | SEC |
| Jul 15, 20255:12 PM ET | BlackRock Portfolio Management LLC | 13G/A | 6.30%30.3M shares | +1.10 ppfrom 5.20% | Jun 30, 2025 | SEC |
| May 14, 20254:07 PM ET | Hotchkis & Wiley Capital Management LLC | 13G | 5.34%25.5M shares | – | Mar 31, 2025 | SEC |
| May 1, 20258:17 AM ET | Grantham, Mayo, Van Otterloo & Co. LLC | 13G/A | 8.34%39.9M shares | 0.00 ppfrom 8.34% | Mar 31, 2025 | SEC |
| May 1, 20258:17 AM ET | Grantham, Mayo, Van Otterloo & Co. LLC | 13G/A | 8.34%39.9M shares | +1.43 ppfrom 6.91% | Mar 31, 2025 | SEC |
| Apr 23, 202511:25 AM ET | cobas asset management, sgiic, s.a. | 13G | 5.20%24.8M shares | – | Apr 10, 2025 | SEC |
| Apr 17, 20253:30 PM ET | Vaughan Nelson Investment Management, L.P.and 1 other | 13G/A | 0.84%4.03M shares | −4.48 ppfrom 5.32%Below 5% | Mar 31, 2025 | SEC |
| Apr 16, 20256:22 PM ET | BlackRock, Inc. | 13G/A | 7.90%37.8M shares | −4.10 ppfrom 12.00% | Mar 31, 2025 | SEC |
| Apr 15, 20255:04 PM ET | BlackRock Portfolio Management LLC | 13G | 5.20%25.0M shares | New | Mar 31, 2025 | SEC |
| Feb 12, 20259:03 AM ET | Grantham, Mayo, Van Otterloo & Co. LLC | 13G/A | 6.91%32.6M shares | – | Dec 31, 2024 | SEC |
| Feb 5, 20251:23 PM ET | BlackRock, Inc. | 13G/A | 12.00%56.7M shares | – | Dec 31, 2024 | SEC |
| Jan 30, 20259:35 AM ET | Vaughan Nelson Investment Management, L.P.and 1 other | 13G/A | 5.32%25.1M shares | – | Dec 31, 2024 | SEC |
| Dec 6, 202411:45 AM ET | FMR LLCand 1 other | 13G/A | 2.10%9.83M shares | –Below 5% | Nov 29, 2024 | SEC |
| Nov 8, 2024 | American Century Investment Management Inc | 13GOld format | – | New | – | SEC |
| Aug 12, 2024 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Mar 7, 202412:29 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2024 | Grantham, Mayo, Van Otterloo & Co. LLC | 13GOld format | – | – | – | SEC |
| Feb 9, 2024 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Jan 26, 2024 | Vaughan Nelson Investment Management, L.P. | 13G/AOld format | – | – | – | SEC |
| Jan 24, 20242:27 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 22, 2024 | State Street Corp | 13G/AOld format | – | – | – | SEC |
| Sep 7, 20239:38 AM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2023 | Hotchkis & Wiley Capital Management LLC | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2023 | Grantham, Mayo, Van Otterloo & Co. LLC | 13GOld format | – | – | – | SEC |
| Feb 9, 2023 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Feb 3, 20234:27 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 3, 2023 | Vaughan Nelson Investment Management, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 3, 2023 | State Street Corp | 13GOld format | – | New | – | SEC |
| Feb 11, 2022 | Hotchkis & Wiley Capital Management LLC | 13GOld format | – | – | – | SEC |
| Feb 11, 2022 | Grantham, Mayo, Van Otterloo & Co. LLC | 13GOld format | – | – | – | SEC |
| Feb 9, 2022 | Vaughan Nelson Investment Management, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 3, 20224:41 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 10, 2022 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Nov 18, 2021 | cobas asset management, sgiic, s.a. | 13G/AOld format | – | – | – | SEC |
| Sep 10, 2021 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Aug 20, 2021 | cobas asset management, sgiic, s.a. | 13G/AOld format | – | – | – | SEC |
| Feb 12, 2021 | Grantham, Mayo, Van Otterloo & Co. LLC | 13GOld format | – | New | – | SEC |
| Feb 11, 2021 | Vaughan Nelson Investment Management, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2021 | Hotchkis & Wiley Capital Management LLC | 13G/AOld format | – | – | – | SEC |
| Feb 8, 2021 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Feb 4, 2021 | Wellington Management Group LLP | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
65 notices from officers, directors and other affiliates planning to sell Kosmos Energy Ltd. shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Jul 2, 20265:07 PM ET | Inglis Andrew GOfficer · Director | 85.9K | $176.7K | Jul 2, 2026 | Fidelity Brokerage Services LLC | SEC |
| Jul 2, 20265:04 PM ET | Shah Nealesh D.Officer | 46.0K | $94.5K | Jul 2, 2026 | Fidelity Brokerage Services LLC | SEC |
| Jul 2, 20264:58 PM ET | Marion Josh R.Officer | 25.0K | $51.3K | Jul 2, 2026 | Fidelity Brokerage Services LLC | SEC |
| Jul 2, 20264:46 PM ET | Glass Ronald W.Officer | 12.1K | $24.9K | Jul 2, 2026 | Fidelity Brokerage Services LLC | SEC |
| May 28, 202610:07 AM ET | Franklin Roy A.Officer · Director | 43.5K | $118.7K | May 28, 2026 | Fidelity Brokerage Services LLC | SEC |
| May 27, 20262:43 PM ET | Grant John Douglas KelsoDirector | 43.5K | $118.6K | May 27, 2026 | Fidelity Brokerage Services LLC | SEC |
| May 27, 20262:42 PM ET | Sterin StevenDirector | 38.6K | $105.5K | May 27, 2026 | Fidelity Brokerage Services LLC | SEC |
| Feb 4, 20263:27 PM ET | Inglis Andrew GOfficer · Director | 44.6K | $63.5K | Feb 4, 2026 | Fidelity Brokerage Services LLC | SEC |
| Feb 4, 20263:26 PM ET | Shah Nealesh D.Officer | 24.7K | $35.1K | Feb 4, 2026 | Fidelity Brokerage Services LLC | SEC |
| Feb 4, 20263:16 PM ET | Marion Josh R.Officer | 3.28K | $4.67K | Feb 4, 2026 | Fidelity Brokerage Services LLC | SEC |
| Feb 4, 20263:08 PM ET | Glass Ronald W.Officer | 3.31K | $4.71K | Feb 4, 2026 | Fidelity Brokerage Services LLC | SEC |
| Feb 3, 20264:52 PM ET | Marion Josh R.Officer | 19.7K | $27.1K | Feb 3, 2026 | Fidelity Brokerage Services LLC | SEC |
| Feb 3, 20264:34 PM ET | Shah Nealesh D.Officer | 54.4K | $74.9K | Feb 3, 2026 | Fidelity Brokerage Services LLC | SEC |
| Feb 3, 20264:27 PM ET | Inglis Andrew GOfficer · Director | 103.6K | $142.6K | Feb 3, 2026 | Fidelity Brokerage Services LLC | SEC |
| Feb 3, 20264:21 PM ET | Glass Ronald W.Officer | 19.3K | $26.5K | Feb 3, 2026 | Fidelity Brokerage Services LLC | SEC |
| Dec 22, 20254:28 PM ET | Christopher James BallFormer officer | 1.43M | $1.42M | Dec 18, 2025 | Coutts & Co | SEC |
| Dec 18, 20254:33 PM ET | Christopher James BallFormer officer | 7.79K | $7.16K | Dec 17, 2025 | Coutts & Co | SEC |
| Jun 5, 202510:02 AM ET | Grant John Douglas KelsoDirector | 27.9K | $50.5K | Jun 5, 202510b5-1 | Fidelity Brokerage Services LLC | SEC |
| Feb 5, 20254:29 PM ET | Inglis Andrew GOfficer · Director | 138.7K | $433.0K | Feb 5, 2025 | Fidelity Brokerage Services LLC | SEC |
| Feb 5, 20254:27 PM ET | Ball Christopher JamesOfficer | 84.9K | $265.0K | Feb 5, 2025 | Fidelity Brokerage Services LLC | SEC |
| Feb 5, 20254:26 PM ET | Marion Josh R.Officer | 10.4K | $32.3K | Feb 5, 2025 | Fidelity Brokerage Services LLC | SEC |
| Feb 5, 20254:25 PM ET | Shah Nealesh D.Officer | 78.0K | $243.6K | Feb 5, 2025 | Fidelity Brokerage Services LLC | SEC |
| Feb 5, 20254:14 PM ET | Glass Ronald W.Officer | 10.4K | $32.3K | Feb 5, 2025 | Fidelity Brokerage Services LLC | SEC |
| Feb 4, 20254:38 PM ET | Shah Nealesh D.Officer | 78.2K | $243.6K | Feb 4, 2025 | Fidelity Brokerage Services LLC | SEC |
| Feb 4, 20254:28 PM ET | Glass Ronald W.Officer | 10.4K | $32.3K | Feb 4, 2025 | Fidelity Brokerage Services LLC | SEC |
Showing the latest 25. See the KOS notices from the last 12 months