Jane Street’s Roundhill COST WeeklyPay ETF COSW Stock Holding History

Jane Street’s Portfolio COSW Stock Details COSW Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-14,256	Closed	-$606K	–	13612
2025 Q4	$606K	Buy	+14,256	New	+$656K	﹤0.01%	7270

Other funds holding COSW

ETC

Exchange Traded Concepts Oklahoma City, Oklahoma $21.9B AUM 68.6% 1-Year Est. Return

OMC

Old Mission Capital Chicago, Illinois $6.3B AUM 14.68% 1-Year Est. Return

GTS Securities New York $2.83B AUM 21.76% 1-Year Est. Return

Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return

Simplex Trading Chicago, Illinois $149B AUM 62.07% 1-Year Est. Return

Jane Street's COSW Position: Q1 2026 in Review

Jane Street sold out of Roundhill COST WeeklyPay ETF (COSW) in Q1 2026, closing a stake of 14,256 shares — an estimated $606K sold.

Jane Street first reported a position in COSW in Q4 2025 and held it in 1 quarter. The position peaked at $606K in Q4 2025. 5 funds tracked by Wall St. Rank hold COSW as of Q1 2026.

Jane Street reported no remaining Roundhill COST WeeklyPay ETF position as of Q1 2026 after selling out during the quarter.
Jane Street sold 14,256 Roundhill COST WeeklyPay ETF shares in Q1 2026, an estimated $606K.
Jane Street first reported a position in Roundhill COST WeeklyPay ETF in Q4 2025 and held it in 1 quarter.
Jane Street's Roundhill COST WeeklyPay ETF position peaked at $606K in Q4 2025.
5 funds tracked by Wall St. Rank held Roundhill COST WeeklyPay ETF as of Q1 2026.

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