Jane Street’s Roundhill Weekly T-Bill ETF WEEK Stock Holding History

Jane Street’s Portfolio WEEK Stock Details WEEK Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$883K	Buy	8,827 +1,956	+28%	+$196K	﹤0.01%	6793
2025 Q4	$688K	Sell	6,871 -25,545	-79%	-$2.56M	﹤0.01%	7008
2025 Q3	$3.24M	Buy	32,416 +28,998	+848%	+$2.9M	﹤0.01%	4095
2025 Q2	$342K	Sell	3,418 -14,347	-81%	-$1.44M	﹤0.01%	7628
2025 Q1	$1.78M	Buy	+17,765	New	+$1.78M	﹤0.01%	4560

Other funds holding WEEK

ETC

Exchange Traded Concepts Oklahoma City, Oklahoma $14.1B AUM 25.71% 1-Year Est. Return

Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Jane Street's WEEK Position: Q1 2026 in Review

Jane Street increased its Roundhill Weekly T-Bill ETF (WEEK) stake by 28% in Q1 2026, buying an estimated $196K and bringing the position to 8,827 shares worth $883K. The position accounts for ﹤0.01% of the portfolio, ranked #6793.

Jane Street first reported a position in WEEK in Q1 2025 and has held it in 5 quarters since. The position peaked at $3.24M in Q3 2025. 3 funds tracked by Wall St. Rank hold WEEK as of Q1 2026.

Jane Street held 8,827 shares of Roundhill Weekly T-Bill ETF worth $883K as of Q1 2026.
Jane Street bought 1,956 Roundhill Weekly T-Bill ETF shares in Q1 2026, an estimated $196K.
Roundhill Weekly T-Bill ETF made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #6793 holding.
Jane Street first reported a position in Roundhill Weekly T-Bill ETF in Q1 2025 and has held it in 5 quarters since.
Jane Street's Roundhill Weekly T-Bill ETF position peaked at $3.24M in Q3 2025.
3 funds tracked by Wall St. Rank held Roundhill Weekly T-Bill ETF as of Q1 2026.

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