Jane Street’s ProShares UltraShort Industrials SIJ Stock Holding History

Jane Street’s Portfolio SIJ Stock Details SIJ Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	–	Sell	-6,521	Closed	-$136K	–	12976
2026 Q1	$136K	Buy	+6,521	New	+$127K	﹤0.01%	10464
2021 Q3	–	Sell	-3,237	Closed	-$188K	–	10639
2021 Q2	$188K	Buy	+3,237	New	+$194K	﹤0.01%	8879
2019 Q1	–	Sell	-972	Closed	-$314K	–	5572
2018 Q4	$314K	Sell	972 -218	-18%	-$61K	﹤0.01%	4013
2018 Q3	$272K	Buy	1,190 +179	+18%	+$43.4K	﹤0.01%	4332
2018 Q2	$273K	Sell	1,011 -398	-28%	-$105K	﹤0.01%	4225
2018 Q1	$380K	Sell	1,409 -95	-6%	-$24.4K	﹤0.01%	3769
2017 Q4	$405K	Buy	+1,504	New	+$436K	﹤0.01%	3432

Other funds holding SIJ

Susquehanna International Group Bala Cynwyd, Pennsylvania $1.28T AUM 58.89% 1-Year Est. Return

Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return

Jane Street's SIJ Position: Q2 2026 in Review

Jane Street sold out of ProShares UltraShort Industrials (SIJ) in Q2 2026, closing a stake of 6,521 shares — an estimated $136K sold.

Jane Street first reported a position in SIJ in Q4 2017 and held it in 7 quarters. The position peaked at $405K in Q4 2017. 2 funds tracked by Wall St. Rank hold SIJ as of Q2 2026.

Jane Street reported no remaining ProShares UltraShort Industrials position as of Q2 2026 after selling out during the quarter.
Jane Street sold 6,521 ProShares UltraShort Industrials shares in Q2 2026, an estimated $136K.
Jane Street first reported a position in ProShares UltraShort Industrials in Q4 2017 and held it in 7 quarters.
Jane Street's ProShares UltraShort Industrials position peaked at $405K in Q4 2017.
2 funds tracked by Wall St. Rank held ProShares UltraShort Industrials as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.