Kosmos Energy Ltd.
GB ˙ BATS-CHIXE ˙ US5006881065
SecurityGB:KOSL / Kosmos Energy Ltd.
InstitutionBnp Paribas Arbitrage, Sa
Latest Disclosed Ownership128,982 shares
Latest Disclosed Value $ 358,570
Bnp Paribas Arbitrage, Sa ownership in KOSL / Kosmos Energy Ltd.

On May 12, 2026 - Bnp Paribas Arbitrage, Sa filed a 13F-HR form disclosing ownership of 128,982 shares of Kosmos Energy Ltd. (GB:KOSL) valued at $358,570 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 97,080 shares of Kosmos Energy Ltd.. This represents a change in shares of 32.86% during the quarter.

Bnp Paribas Arbitrage, Sa has a history of taking positions in derivatives of the underlying security (KOSL) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

GB:KOSL / Kosmos Energy Ltd. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F Kosmos Energy Equity 500688106 128,982 31,902 32.86 359 306.82 0.0000
2026-02-10 2025-12-31 13F Kosmos Energy Equity 500688106 97,080 -56,737 -36.89 88 -65.49 0.0000
2025-11-13 2025-09-30 13F Kosmos Energy Equity 500688106 153,817 486 0.32 255 -3.04 0.0001
2025-08-14 2025-06-30 13F Kosmos Energy Equity 500688106 153,331 104,994 217.21 264 139.09 0.0002
2025-05-14 2025-03-31 13F Kosmos Energy Equity 500688106 48,337 -105,995 -68.68 110 -79.13 0.0001
2025-02-14 2024-12-31 13F Kosmos Energy Equity 500688106 154,332 -1,208,369 -88.67 528 -90.40 0.0003
2024-11-13 2024-09-30 13F Kosmos Energy Equity 500688106 1,362,701 1,143,431 521.47 5,492 352.31 0.0037
2024-08-13 2024-06-30 13F Kosmos Energy Equity 500688106 219,270 -315,764 -59.02 1,215 -61.92 0.0010
2024-05-01 2024-03-31 13F Kosmos Energy Equity 500688106 535,034 -550,634 -50.72 3,189 -56.23 0.0028
2024-02-14 2023-12-31 13F/A-2 Kosmos Energy Equity 500688106 1,085,668 382,453 54.39 7,285 26.63 0.0083
2024-02-07 2023-12-31 13F/A-1 Kosmos Energy Equity 500688106 1,085,668 382,453 7,285 0.0010
2024-02-07 2023-12-31 13F Kosmos Energy Equity 500688106 1,085,668 7,285
2023-11-14 2023-09-30 13F Kosmos Energy Equity 500688106 703,215 53,041 8.16 5,752 47.71 0.0074
2023-08-09 2023-06-30 13F Kosmos Energy Equity 500688106 650,174 55,015 9.24 3,895 -12.04 0.0049
2023-05-12 2023-03-31 13F KOSMOS ENERGY EQUITY 500688106 595,159 496,155 501.15 4,428 603.82 0.0062
2023-02-14 2022-12-31 13F Kosmos Energy Equity 500688106 99,004 -177,349 -64.17 630 -55.95 0.0010
2022-11-16 2022-09-30 13F/A-1 Kosmos Energy Equity 500688106 276,353 -869,371 -75.88 1,429 -79.86 0.0023
2022-11-15 2022-09-30 13F Kosmos Energy Equity 500688106 276,353 -869,371 1,429 0.0003
2022-08-12 2022-06-30 13F Kosmos Energy Equity 500688106 1,145,724 156,584 15.83 7,092 -0.27 0.0111
2022-05-18 2022-03-31 13F/A-1 Kosmos Energy Equity 500688106 989,140 400,444 68.02 7,112 249.26 0.0096
2022-02-09 2021-12-31 13F KOSMOS ENERGY EQUITY 500688106 588,696 388,482 194.03 2,037 243.92 0.0029
2021-11-16 2021-09-30 13F/A-1 KOSMOS ENERGY EQUITY 500688106 200,214 55,517 38.37 593 18.40 0.0008
2021-11-12 2021-09-30 13F KOSMOS ENERGY EQUITY 500688106 160,226 15,529 156 0.0000
2021-08-10 2021-06-30 13F KOSMOS ENERGY EQUITY 500688106 144,697 -54,645 -27.41 501 -18.17 0.0007
2021-05-07 2021-03-31 13F KOSMOS ENERGY EQUITY 500688106 199,342 27,358 15.91 612 51.24 0.0009
2021-02-10 2020-12-31 13F KOSMOS ENERGY EQUITY 500688106 171,984 11,758 7.34 404 158.97 0.0008
2020-10-30 2020-09-30 13F KOSMOS ENERGY EQUITY 500688106 160,226 85,977 115.80 156 26.83 0.0002
2020-08-06 2020-06-30 13F KOSMOS ENERGY EQUITY 500688106 74,249 -2,413,258 -97.02 123 -94.48 0.0002
2020-05-13 2020-03-31 13F KOSMOS ENERGY EQUITY 500688106 2,487,507 533,007 27.27 2,228 -80.01 0.0046
2020-02-12 2019-12-31 13F KOSMOS ENERGY EQUITY 500688106 1,954,500 1,914,647 4,804.27 11,141 4,391.94 0.0203
2019-11-07 2019-09-30 13F KOSMOS ENERGY EQUITY 500688106 39,853 -1,015,993 -96.23 249 -96.25 0.0004
2019-07-30 2019-06-30 13F KOSMOS ENERGY EQUITY 500688106 1,055,846 1,055,846 6,620 0.0132
2019-02-12 2018-12-31 13F KOSMOS ENERGY EQUITY G5315B107 0 -103,806 -100.00 0 -100.00
2018-11-07 2018-09-30 13F KOSMOS ENERGY EQUITY G5315B107 103,806 -92 -0.09 971 12.92 0.0014
2018-07-25 2018-06-30 13F KOSMOS ENERGY EQUITY G5315B107 103,898 51,620 98.74 859 161.09 0.0014
2018-05-11 2018-03-31 13F KOSMOS ENERGY EQUITY G5315B107 52,278 18,089 52.91 329 40.60 0.0006
2018-03-05 2017-12-31 13F/A-1 KOSMOS ENERGY EQUITY G5315B107 34,189 1,151 3.48 234 -10.69 0.0004
2018-02-01 2017-12-31 13F KOSMOS ENERGY EQUITY G5315B107 34,189 1,151 234
2017-11-03 2017-09-30 13F KOSMOS ENERGY STOCK G5315B107 33,038 211 0.64 263 24.76 0.0006
2017-08-03 2017-06-30 13F KOSMOS ENERGY STOCK G5315B107 32,827 -312,060 -90.48 210 -90.85 0.0006
2017-05-03 2017-03-31 13F KOSMOS ENERGY STOCK G5315B107 344,887 306,419 796.56 2,297 753.53 0.0061
2017-02-14 2016-12-31 13F KOSMOS ENERGY STOCK G5315B107 38,468 -9,247 -19.38 270 -11.80 0.0013
2016-10-05 2016-09-30 13F * KOSMOS ENERGY LTD SHS STOCK G5315B107 47,715 -3,550 -6.92 306 9.32 0.0013
2016-07-06 2016-06-30 13F * KOSMOS ENERGY LTD SHS STOCK G5315B107 51,265 1,921 3.89 279 -2.79 0.0013
2016-04-22 2016-03-31 13F * KOSMOS ENERGY LTD SHS STOCK G5315B107 49,344 -32,495 -39.71 287 -32.47 0.0012
2016-04-19 2015-12-31 13F/A-1 * KOSMOS ENERGY LTD SHS STOCK G5315B107 81,839 -216,549 -72.57 426 -74.47 0.0021
2016-02-10 2015-12-31 13F * KOSMOS ENERGY LTD SHS STOCK G5315B107 81,839 426
2015-11-13 2015-09-30 13F * KOSMOS ENERGY LTD SHS STOCK G5315B107 298,388 289,560 3,280.02 1,665 2,150.00 0.0042
2015-08-14 2015-06-30 13F KOSMOS ENERGY LTD SHS STOCK G5315B107 8,828 -117,330 -93.00 74 -92.58 0.0002
2015-05-15 2015-03-31 13F * KOSMOS ENERGY LTD SHS STOCK G5315B107 126,158 126,089 182,737.68 998 0.0028
2015-03-10 2014-12-31 13F/A-1 * KOSMOS ENERGY LTD SHS STOCK G5315B107 69 69 1 0.0000
2015-02-11 2014-12-31 13F * KOSMOS ENERGY LTD SHS STOCK G5315B107 69 1 0.0000
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-08-13 2024-06-30 13F Kosmos Energy Option Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-01 2024-03-31 13F Kosmos Energy Option Call 100 -33.33 60 -41.00 n/a n/a n/a
2024-02-14 2023-12-31 13F/A Kosmos Energy Option Call 150 0.00 101 -18.03 n/a n/a n/a
2024-02-07 2023-12-31 13F/A Kosmos Energy Option Call 150 101 n/a n/a n/a
2024-02-07 2023-12-31 13F Kosmos Energy Option Call 150 101 n/a n/a n/a
2023-11-14 2023-09-30 13F Kosmos Energy Option Call 150 0.00 123 37.08 n/a n/a n/a
2023-08-09 2023-06-30 13F Kosmos Energy Option Call 150 90 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-02-14 2024-12-31 13F Kosmos Energy Option Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-13 2024-09-30 13F Kosmos Energy Option Put 250 101 n/a n/a n/a
2024-08-13 2024-06-30 13F Kosmos Energy Option Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-01 2024-03-31 13F Kosmos Energy Option Put 415 247 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.