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Buy Day today: Good (62) Broad market participation · no major macro event
KOS

Kosmos Energy Ltd

Energy · Oil & Gas E&P

2.80$ -1.0% vs. previous close Closing price · As of: Sep 17, 2026

Ownership

Ownership Structure

Who owns Kosmos Energy Ltd (KOS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 96.4% of the shares are freely tradable; institutional investors hold 81.4%.

Institutional ownership ?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings. 81.4%
Insiders ?Share of the stock held by the executives, founders and major shareholders of the company itself. 2.2%
Float ?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders. 96.4%
Short % of float ?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices. 4.2%
Shares Outstanding ?Total number of shares issued. Price times share count gives market cap. 596Mio.

Largest Shareholders

Institutions

Institutions KOS
Name Stake (%) Shares Change (%) Date
BlackRock Inc 7.97 47,463,094 +1.3 03/31/2026
State Street Corp 4.74 28,247,797 +38.3 03/31/2026
Two Sigma Investments LLC 4.27 25,398,092 +36.0 06/30/2026
D. E. Shaw & Co LP 4.12 24,538,308 +20.4 06/30/2026
Mason Hill Asset Management Incet AL 3.47 20,678,033 +0.0 06/30/2026
Hotchkis & Wiley Capital Management LLC 3.37 20,051,601 -0.3 03/31/2026
Grantham, Mayo, Van Otterloo & Co., LLC 3.07 18,307,718 -47.4 03/31/2026
Charles Schwab Investment Management Inc 2.37 14,135,448 +17.3 03/31/2026

Funds

Funds KOS
Name Stake (%) Shares Change (%) Date
SttStrtSPDRS&POil&GasExplor&ProdtnETF 2.96 17,621,171 -0.5 08/31/2026
iShares Russell 2000 ETF 2.55 15,189,517 -0.6 08/31/2026

Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.

Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)

Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.

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