Jane Street
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Jane Street’s Proshares UltraShort Technology REW Stock Holding History

Jane Street’s Portfolio REW Stock Details REW Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2024
Q3 		– Sell
-1,824,300
Closed -$148M – 10277
2024
Q2 		$148M Buy
1,824,300
+1,463,025
+405% +$78.9M 0.03% 277
2024
Q1 		$75.7M Buy
361,275
+166,512
+85% +$9.78M 0.02% 458
2023
Q4 		$27.5M Sell
194,763
-215,250
-52% -$16.7M 0.01% 1028
2023
Q3 		$57.5M Sell
410,013
-19,975
-5% -$1.67M 0.02% 500
2023
Q2 		$62.5M Sell
429,988
-115,225
-21% -$11.6M 0.02% 509
2023
Q1 		$106M Buy
545,213
+41,290
+8% +$5.72M 0.04% 287
2022
Q4 		$148M Sell
503,923
-70,150
-12% -$12.1M 0.07% 202
2022
Q3 		$187M Buy
574,073
+39,208
+7% +$6.02M 0.08% 136
2022
Q2 		$144M Buy
+534,865
New +$83.5M 0.06% 210

Other funds holding REW

Cambridge Investment Research Advisors
Cambridge Investment Research Advisors Fairfield, Iowa $43.3B AUM 29.3% 1-Year Est. Return
Susquehanna International Group
Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return
CI
CPR Investments Rochester, Michigan $130M AUM 29.56% 1-Year Est. Return

Jane Street's REW Position: Q1 2026 in Review

Jane Street opened a new position in Proshares UltraShort Technology (REW) in Q1 2026: 6,851 shares worth $171K. The stake represents ﹤0.01% of the portfolio and ranks #10283 among its holdings. This is a return to the name: Jane Street previously reported a position in REW as recently as Q3 2022.

Jane Street first reported a position in REW in Q2 2013 and has held it in 13 quarters since. The position peaked at $777K in Q3 2016. 4 funds tracked by Wall St. Rank hold REW as of Q1 2026.

  • Jane Street held 6,851 shares of Proshares UltraShort Technology worth $171K as of Q1 2026.
  • Proshares UltraShort Technology was a new Jane Street position in Q1 2026.
  • Proshares UltraShort Technology made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #10283 holding.
  • Jane Street first reported a position in Proshares UltraShort Technology in Q2 2013 and has held it in 13 quarters since.
  • Jane Street's Proshares UltraShort Technology position peaked at $777K in Q3 2016.
  • 4 funds tracked by Wall St. Rank held Proshares UltraShort Technology as of Q1 2026.

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