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Kosmos Energy Ltd. (KOS) Institutional Ownership & Insider Trading

267 institutions reported holding Kosmos Energy Ltd. shares in 13F filings for the quarter ended 2026-06-30, according to EquiReason's reading of their SEC filings. 19 insider trades on Form 4 since 2025-10-01.

Source: SEC EDGAR filings · figures as of 2026-06-30 · read by EquiReason

KOSKosmos Energy Ltd.Follow KOS — free
Oil & Gas E&P · Energy
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Price chart with a free account
Market cap
1.7B
P/E TTM
—
Dividend yield
—
52-week
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Next earnings
2 Nov, in 9 days

Institutions · all 13F filers

quarter to 30 Jun 2026 · filers in both quarters

267 institutions held 72.4% of the shares. Across filers that reported both quarters, shares held changed -0.7%.

Increased+113New+45Decreased-59Closed-37

Largest moves, shares (millions)

BlackRock+8.6MAmerican Century Companies+7.9MTwo Sigma Investments+6.7MJane Street Group-11.6MGrantham, Mayo, Van Otterloo-6.5MMillennium Management-5.2M

Institutional flow by quarter

net shares added or trimmed, millions · filers in both quarters
-8.1Sep 24-11.4Dec 24+4.2Mar 25-21.6Jun 25-16.6Sep 25-56.1Dec 25+90.2Mar 26-3.1Jun 26
QuarterHoldersShares held, MChangeIncreasedNewDecreasedClosed
Jun 26267431-0.7%113455937
Mar 26257434+27.8%84755328
Dec 25208342-14.1%54228346
Sep 25229398-4.0%71227221
Jun 25223414-5.0%79286650
Mar 25247434+1.0%94346649
Dec 24264434-2.6%101356342
Sep 24267444-2.0%94407039

Kosmos Energy Ltd. — questions

Who owns Kosmos Energy Ltd. stock?
267 institutions reported Kosmos Energy Ltd. shares in 13F filings for the quarter ended 2026-06-30. The largest: BlackRock, Inc. (9.4%), STATE STREET CORP (5.0%), TWO SIGMA INVESTMENTS, LP (4.3%).
Are Kosmos Energy Ltd. insiders buying or selling?
19 insider trades on Form 4 since 2025-10-01; the full list, with dates, people and plan status, is on this page.

Every figure on this page comes from Kosmos Energy Ltd.'s own SEC filings — see them on SEC EDGAR. Price data is licensed and shown only inside the product.

How these figures are read: methodology · EquiReason.