Jane Street’s Quantum Cyber N.V. QUCY Stock Holding History

Jane Street’s Portfolio QUCY Stock Details QUCY Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$133K	Buy	84,574 +68,481	+426%	+$98.2K	﹤0.01%	10438
2026 Q1	$7.63K	Sell	16,093 -2,344	-13%	-$2.06K	﹤0.01%	11329
2025 Q4	$20.6K	Buy	+18,437	New	+$24.3K	﹤0.01%	10718
2024 Q4	–	Sell	-364	Closed	-$3.63K	–	10152
2024 Q3	$3.63K	Buy	+364	New	+$5.04K	﹤0.01%	9417

Other funds holding QUCY

Virtu Financial New York $3.18B AUM 65.92% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

SPIA

Steward Partners Investment Advisory New York $19.6B AUM 29.84% 1-Year Est. Return

XTX Topco George Town, Cayman Islands $7.72B AUM 32.88% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

PAS

Professional Advisory Services Vero Beach, Florida $836M AUM 25.79% 1-Year Est. Return

JAG

Journey Advisory Group Covington, Kentucky $1.31B AUM 24.92% 1-Year Est. Return

KFGG

Keystone Financial Group (Georgia) Atlanta, Georgia $191M AUM 13.82% 1-Year Est. Return

TRCT

Tower Research Capital (TRC) New York $4.08B AUM 58.77% 1-Year Est. Return

Osaic Holdings Scottsdale, Arizona $85.1B AUM 27.35% 1-Year Est. Return

Jane Street's QUCY Position: Q2 2026 in Review

Jane Street increased its Quantum Cyber N.V. (QUCY) stake by 426% in Q2 2026, buying an estimated $98.2K and bringing the position to 84,574 shares worth $133K. The position accounts for ﹤0.01% of the portfolio, ranked #10438.

Jane Street first reported a position in QUCY in Q3 2024 and has held it in 4 quarters since. 18 funds tracked by Wall St. Rank hold QUCY as of Q2 2026.

Jane Street held 84,574 shares of Quantum Cyber N.V. worth $133K as of Q2 2026.
Jane Street bought 68,481 Quantum Cyber N.V. shares in Q2 2026, an estimated $98.2K.
Quantum Cyber N.V. made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #10438 holding.
Jane Street first reported a position in Quantum Cyber N.V. in Q3 2024 and has held it in 4 quarters since.
18 funds tracked by Wall St. Rank held Quantum Cyber N.V. as of Q2 2026.

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