Kosmos Energy Ltd. (KOS) Ownership
KOS ownership summary
as of October 18, 2026- Institutions
- 76.7% of shares outstanding
- Insiders
- 2.30% of shares outstanding
- Shares outstanding
- 595.5M
- Float
- 581.6M shares available to trade
- Short interest
- 5.77% 33.9M shares short
- Days to cover
- 2.66 short interest up 37.4% vs prior month
- Institutions 76.71%
- Insiders 2.30%
- Other investors 20.99%
KOS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 9.41% | 56.0M | $155.7M | +8.6M (+18.0%) | June 30, 2026 |
| 2 | State Street Corp | 4.95% | 29.5M | $81.9M | +1.2M (+4.3%) | June 30, 2026 |
| 3 | Two Sigma Investments LLC | 4.27% | 25.4M | $70.6M | +6.7M (+36.0%) | June 30, 2026 |
| 4 | D. E. Shaw & Co LP | 4.12% | 24.5M | $68.2M | +4.2M (+20.4%) | June 30, 2026 |
| 5 | Mason Hill Asset Management Incet AL | 3.47% | 20.7M | $57.5M | — | June 30, 2026 |
| 6 | Hotchkis & Wiley Capital Management LLC | 3.16% | 18.8M | $52.4M | −1.2M (−6.0%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 2.87% | 17.1M | $47.4M | +4.4M (+34.2%) | June 30, 2026 |
| 8 | Charles Schwab Investment Management Inc | 2.31% | 13.8M | $38.3M | −365,782 (−2.6%) | June 30, 2026 |
| 9 | Vanguard Portfolio Management, LLC | 2.02% | 12.0M | $33.4M | +3.4M (+39.2%) | June 30, 2026 |
| 10 | Grantham, Mayo, Van Otterloo & Co., LLC | 1.99% | 11.9M | $32.9M | −6.5M (−35.3%) | June 30, 2026 |
| 11 | Amvescap Plc. | 1.84% | 10.9M | $30.4M | −201,201 (−1.8%) | June 30, 2026 |
| 12 | Dimensional Fund Advisors, Inc. | 1.61% | 9.6M | $26.6M | +2.5M (+35.3%) | June 30, 2026 |
| 13 | The Goldman Sachs Group Inc | 1.43% | 8.5M | $23.7M | −729,749 (−7.9%) | June 30, 2026 |
| 14 | American Century Companies Inc | 1.35% | 8.0M | $22.3M | +7.9M (+8,083.6%) | June 30, 2026 |
| 15 | Davidson Kempner Capital Management LP | 1.34% | 8.0M | $22.2M | −419,663 (−5.0%) | June 30, 2026 |
| 16 | Millennium Management LLC | 1.25% | 7.4M | $20.7M | −5.2M (−41.2%) | June 30, 2026 |
| 17 | M&G PLC | 1.24% | 7.4M | $20.6M | +377,815 (+5.4%) | June 30, 2026 |
| 18 | Morgan Stanley - Brokerage Accounts | 1.24% | 7.4M | $20.5M | +1.5M (+26.1%) | June 30, 2026 |
| 19 | Nuveen, LLC | 1.23% | 7.3M | $20.4M | +4.0M (+121.2%) | June 30, 2026 |
| 20 | Renaissance Technologies Corp | 1.18% | 7.0M | $19.5M | +1.7M (+31.3%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 12 holders added 46.4M shares and 7 cut 14.6M.
KOS top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | SttStrtSPDRS&POil&GasExplor&ProdtnETF | 2.95% | 17.5M | $48.8M | −609,070 (−3.4%) | September 30, 2026 |
| 2 | Avantis US Small Cap Value ETF | 2.61% | 15.6M | $43.3M | +61,272 (+0.4%) | September 30, 2026 |
| 3 | iShares Russell 2000 ETF | 2.58% | 15.4M | $42.8M | −177,216 (−1.1%) | September 30, 2026 |
| 4 | Cobas Selección C FI | 2.21% | 13.1M | $36.5M | +2.0M (+18.2%) | December 31, 2025 |
| 5 | Cobas Internacional C FI | 2.03% | 12.1M | $33.6M | +1.7M (+16.9%) | December 31, 2025 |
| 6 | GMO Resources III | 1.45% | 8.6M | $23.9M | — | June 30, 2026 |
| 7 | Schwab Fundamental U.S. Small CompanyETF | 1.15% | 6.9M | $19.1M | +9,758 (+0.1%) | September 30, 2026 |
| 8 | Hotchkis & Wiley Mid-Cap Value I | 1.10% | 6.5M | $18.2M | — | September 30, 2026 |
| 9 | Fidelity Small Cap Index | 1.09% | 6.5M | $18.1M | +51,800 (+0.8%) | July 31, 2026 |
| 10 | AZ Fd1 AZ Equity Best Value A - EUR Acc | 1.01% | 6.0M | $16.7M | +15,349 (+0.3%) | August 31, 2026 |
| 11 | iShares Russell 2000 Value ETF | 0.88% | 5.3M | $14.6M | +7,990 (+0.2%) | September 30, 2026 |
| 12 | Vanguard Energy ETF | 0.85% | 5.1M | $14.1M | −25,273 (−0.5%) | September 30, 2026 |
| 13 | M&G Global Emerging Markets GBP I Acc | 0.78% | 4.6M | $12.9M | −85,970 (−1.8%) | June 30, 2026 |
| 14 | First Trust Natural Gas ETF | 0.71% | 4.2M | $11.8M | −37,936 (−0.9%) | September 30, 2026 |
| 15 | BGF World Energy A2 | 0.70% | 4.2M | $11.5M | — | June 30, 2026 |
| 16 | Vanguard Russell 2000 ETF | 0.58% | 3.5M | $9.6M | +38,874 (+1.1%) | September 30, 2026 |
| 17 | Sigma Internacional A FI | 0.53% | 3.2M | $8.8M | −122,557 (−3.7%) | June 30, 2026 |
| 18 | Schwab US Small-Cap ETF™ | 0.53% | 3.1M | $8.7M | +2,124 (+0.1%) | September 30, 2026 |
| 19 | Strategic Advisers U.S. Total Stock | 0.51% | 3.0M | $8.5M | +821,539 (+37.0%) | August 31, 2026 |
| 20 | Cobas Selection P Acc EUR | 0.50% | 3.0M | $8.3M | +118,326 (+4.2%) | June 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
KOS insider transactions
latest 13| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-10 | Adebayo O Ogunlesi | Buy | $1.90 | 3,157,895 | $6.0M |
| 2026-03-10 | Andrew G Inglis | Buy | $1.90 | 315,790 | $600,001 |
| 2026-03-10 | J Michael Stice | Buy | $1.90 | 52,631 | $99,999 |
| 2026-03-10 | Nealesh D Shah | Buy | $1.90 | 157,894 | $299,999 |
| 2026-02-04 | Andrew G Inglis | Sell | $1.42 | 44,628 | $63,372 |
| 2026-02-04 | Josh R Marion | Sell | $1.42 | 3,284 | $4,663 |
| 2026-02-04 | Nealesh D Shah | Sell | $1.42 | 24,690 | $35,060 |
| 2026-02-04 | Ronald W Glass | Sell | $1.42 | 3,313 | $4,704 |
| 2026-02-03 | Andrew G Inglis | Sell | $1.37 | 103,554 | $141,869 |
| 2026-02-03 | Josh R Marion | Sell | $1.37 | 19,656 | $26,929 |
| 2026-02-03 | Nealesh D Shah | Sell | $1.37 | 54,434 | $74,575 |
| 2026-02-03 | Ronald W Glass | Sell | $1.37 | 19,285 | $26,420 |
| 2025-06-05 | John Douglas Kelso Grant | Sell | $1.81 | 27,923 | $50,541 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
KOS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns KOS
Institutional investors own 76.7% of Kosmos Energy's shares and insiders 2.30%. The largest holder is BlackRock Inc with 9.41% of the shares (56.0M), as of June 30, 2026. Among the top 20 institutions, 12 added shares and 7 reduced their stake in the latest filings. Short interest is 5.77% of the float, or 2.66 days of average trading volume. The share count rose 24.0% since 2014.
Related: KOS analyst forecast, KOS key metrics. See the KOS stock overview for the latest quote and news.
KOS ownership FAQ
Who owns the most Kosmos Energy stock?
The largest shareholders of Kosmos Energy are BlackRock Inc (9.41%), State Street Corp (4.95%), Two Sigma Investments LLC (4.27%), D. E. Shaw & Co LP (4.12%), Mason Hill Asset Management Incet AL (3.47%).
What percentage of Kosmos Energy is owned by institutions?
Institutions hold 76.7% of Kosmos Energy's shares outstanding; insiders hold 2.30%.
Which funds own Kosmos Energy?
The largest fund holders of Kosmos Energy are SttStrtSPDRS&POil&GasExplor&ProdtnETF (2.95%), Avantis US Small Cap Value ETF (2.61%), iShares Russell 2000 ETF (2.58%), Cobas Selección C FI (2.21%), Cobas Internacional C FI (2.03%).
What is Kosmos Energy's short interest?
33.9M shares of Kosmos Energy were sold short, 5.77% of the float; at the average daily volume it would take 2.66 days to cover.
Are insiders buying or selling Kosmos Energy?
Of the latest 13 reported insider transactions in Kosmos Energy (since June 5, 2025), 4 were purchases and 9 were sales.
How many shares of Kosmos Energy are outstanding?
Kosmos Energy has 595.5M shares outstanding, of which 581.6M are in the public float.