Jane Street
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Jane Street’s Kosmos Energy KOS Stock Holding History

Jane Street’s Portfolio KOS Stock Details KOS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$1.06M Buy
382,900
+177,300
+86% +$333K ﹤0.01% 6361
2025
Q4 		$187K Buy
205,600
+168,100
+448% +$222K ﹤0.01% 9783
2025
Q3 		$62.3K Buy
37,500
+20,800
+125% +$38.9K ﹤0.01% 10287
2025
Q2 		$28.7K Sell
16,700
-520,300
-97% -$942K ﹤0.01% 9299
2025
Q1 		$1.22M Buy
537,000
+522,200
+3,528% +$1.54M ﹤0.01% 5189
2024
Q4 		$50.6K Buy
14,800
+1,000
+7% +$3.81K ﹤0.01% 8966
2024
Q3 		$55.6K Buy
+13,800
New +$67.2K ﹤0.01% 9155
2024
Q2 		– Sell
-59,200
Closed -$353K – 9821
2024
Q1 		$353K Sell
59,200
-24,700
-29% -$149K ﹤0.01% 7294
2023
Q4 		$563K Sell
83,900
-22,000
-21% -$154K ﹤0.01% 6561
2023
Q3 		$866K Sell
105,900
-40,100
-27% -$284K ﹤0.01% 5409
2023
Q2 		$875K Buy
146,000
+6,300
+5% +$41K ﹤0.01% 5431
2023
Q1 		$1.04M Sell
139,700
-457,300
-77% -$3.35M ﹤0.01% 4921
2022
Q4 		$3.8M Sell
597,000
-649,400
-52% -$4.06M ﹤0.01% 2863
2022
Q3 		$6.44M Sell
1,246,400
-456,700
-27% -$2.77M ﹤0.01% 2238
2022
Q2 		$10.5M Buy
1,703,100
+1,236,800
+265% +$8.92M ﹤0.01% 1680
2022
Q1 		$3.35M Buy
466,300
+247,000
+113% +$1.26M ﹤0.01% 3730
2021
Q4 		$759K Buy
219,300
+97,200
+80% +$349K ﹤0.01% 6470
2021
Q3 		$361K Buy
122,100
+73,000
+149% +$178K ﹤0.01% 7841
2021
Q2 		$170K Buy
+49,100
New +$152K ﹤0.01% 8948
2018
Q4 		– Sell
-625,200
Closed -$5.85M – 5358
2018
Q3 		$5.85M Sell
625,200
-15,600
-2% -$132K 0.01% 926
2018
Q2 		$5.3M Buy
+640,800
New +$4.68M 0.01% 994

Other funds holding KOS

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
EPIM
Equinox Partners Investment Management Stamford, Connecticut $245M AUM 225.58% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
Hotchkis & Wiley Capital Management
Hotchkis & Wiley Capital Management Los Angeles, California $32.4B AUM 17.21% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
Grantham, Mayo, Van Otterloo & Co (GMO)
Grantham, Mayo, Van Otterloo & Co (GMO) Boston, Massachusetts $39.1B AUM 28.69% 1-Year Est. Return
Charles Schwab
Charles Schwab San Francisco, California $654B AUM 26.35% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Jane Street's KOS Position: Q1 2026 in Review

Jane Street increased its Kosmos Energy (KOS) stake by 27% in Q1 2026, buying an estimated $4.65M and bringing the position to 11,743,115 shares worth $32.6M. The position accounts for ﹤0.01% of the portfolio, ranked #1363.

Jane Street first reported a position in KOS in Q4 2013 and has held it in 38 quarters since. 262 funds tracked by Wall St. Rank hold KOS as of Q1 2026.

  • Jane Street held 11,743,115 shares of Kosmos Energy worth $32.6M as of Q1 2026.
  • Jane Street bought 2,473,362 Kosmos Energy shares in Q1 2026, an estimated $4.65M.
  • Kosmos Energy made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #1363 holding.
  • Jane Street first reported a position in Kosmos Energy in Q4 2013 and has held it in 38 quarters since.
  • 262 funds tracked by Wall St. Rank held Kosmos Energy as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.