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
Q3 		$517K Buy
203,700
+57,700
+40% +$150K ﹤0.01% 7942
2026
Q2 		$308K Sell
146,000
-23,000
-14% -$64K ﹤0.01% 9162
2026
Q1 		$470K Buy
+169,000
New +$318K ﹤0.01% 8199
2025
Q4 		– Sell
-28,300
Closed -$47K – 11813
2025
Q3 		$47K Buy
28,300
+6,100
+27% +$11.4K ﹤0.01% 10371
2025
Q2 		$38.2K Buy
22,200
+2,300
+12% +$4.16K ﹤0.01% 9246
2025
Q1 		$45.4K Sell
19,900
-28,700
-59% -$84.7K ﹤0.01% 9027
2024
Q4 		$166K Buy
48,600
+38,300
+372% +$146K ﹤0.01% 8521
2024
Q3 		$41.5K Sell
10,300
-5,300
-34% -$25.8K ﹤0.01% 9204
2024
Q2 		$86.4K Sell
15,600
-50,500
-76% -$295K ﹤0.01% 8785
2024
Q1 		$394K Sell
66,100
-9,300
-12% -$55.9K ﹤0.01% 7110
2023
Q4 		$506K Buy
75,400
+7,400
+11% +$51.8K ﹤0.01% 6736
2023
Q3 		$556K Buy
68,000
+3,300
+5% +$23.4K ﹤0.01% 6128
2023
Q2 		$388K Buy
64,700
+49,700
+331% +$324K ﹤0.01% 6709
2023
Q1 		$112K Sell
15,000
-30,700
-67% -$225K ﹤0.01% 8174
2022
Q4 		$291K Sell
45,700
-3,006,100
-99% -$18.8M ﹤0.01% 7072
2022
Q3 		$15.8M Buy
3,051,800
+2,998,700
+5,647% +$18.2M 0.01% 1272
2022
Q2 		$329K Sell
53,100
-7,600
-13% -$54.8K ﹤0.01% 7462
2022
Q1 		$436K Buy
60,700
+11,100
+22% +$56.6K ﹤0.01% 7728
2021
Q4 		$172K Buy
49,600
+9,200
+23% +$33K ﹤0.01% 8923
2021
Q3 		$120K Buy
+40,400
New +$98.5K ﹤0.01% 9198

Other funds holding KOS

BlackRock
BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $229B AUM 33.35% 1-Year Est. Return
Phoenix Financial
Phoenix Financial Givatayim, Israel $14.8B AUM 42.86% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
Grantham, Mayo, Van Otterloo & Co (GMO)
Grantham, Mayo, Van Otterloo & Co (GMO) Boston, Massachusetts $46.6B AUM 32.12% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $551B AUM 33.95% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.21T AUM
M&G plc
M&G plc London, United Kingdom $19.9B AUM 15.09% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.96T AUM 27.49% 1-Year Est. Return

Jane Street's KOS Position: Q3 2026 in Review

Jane Street increased its Kosmos Energy (KOS) stake by 2,444% in Q3 2026, buying an estimated $5.93M and bringing the position to 2,374,405 shares worth $6.03M. The position accounts for ﹤0.01% of the portfolio, ranked #3463.

Jane Street first reported a position in KOS in Q4 2013 and has held it in 40 quarters since. The position peaked at $32.6M in Q1 2026. 190 funds tracked by Wall St. Rank hold KOS as of Q3 2026.

  • Jane Street held 2,374,405 shares of Kosmos Energy worth $6.03M as of Q3 2026.
  • Jane Street bought 2,281,068 Kosmos Energy shares in Q3 2026, an estimated $5.93M.
  • Kosmos Energy made up ﹤0.01% of Jane Street's portfolio in Q3 2026, its #3463 holding.
  • Jane Street first reported a position in Kosmos Energy in Q4 2013 and has held it in 40 quarters since.
  • Jane Street's Kosmos Energy position peaked at $32.6M in Q1 2026.
  • 190 funds tracked by Wall St. Rank held Kosmos Energy as of Q3 2026.

Based on Jane Street's 13F filing for Q3 2026, filed 12 Nov 2026.