XTX Topco’s Mercury Systems MRCY Stock Holding History

XTX Topco’s Portfolio MRCY Stock Details MRCY Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$370K	Buy	+3,027	New	+$288K	﹤0.01%	2721
2026 Q1	–	Sell	-12,182	Closed	-$889K	–	4155
2025 Q4	$889K	Buy	+12,182	New	+$906K	0.02%	1110
2025 Q2	–	Sell	-5,892	Closed	-$254K	–	2876
2025 Q1	$254K	Sell	5,892 -2,168	-27%	-$95K	0.01%	1533
2024 Q4	$339K	Sell	8,060 -15,107	-65%	-$576K	0.03%	1115
2024 Q3	$857K	Buy	+23,167	New	+$815K	0.06%	494
2023 Q4	–	Sell	-6,217	Closed	-$231K	–	1910
2023 Q3	$231K	Buy	+6,217	New	+$229K	0.04%	930
2021 Q3	–	Sell	-6,165	Closed	-$409K	–	925
2021 Q2	$409K	Buy	+6,165	New	+$426K	0.14%	246

Other funds holding MRCY

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

JPM

JANA Partners Management New York $1.9B AUM 18.33% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

CCA

Conestoga Capital Advisors Wayne, Pennsylvania $4.6B AUM 16.08% 1-Year Est. Return

XTX Topco's MRCY Position: Q2 2026 in Review

XTX Topco opened a new position in Mercury Systems (MRCY) in Q2 2026: 3,027 shares worth $370K. The stake represents ﹤0.01% of the portfolio and ranks #2721 among its holdings. This is a return to the name: XTX Topco previously reported a position in MRCY as recently as Q4 2025.

XTX Topco first reported a position in MRCY in Q2 2021 and has held it in 7 quarters since. The position peaked at $889K in Q4 2025. 392 funds tracked by Wall St. Rank hold MRCY as of Q2 2026.

XTX Topco held 3,027 shares of Mercury Systems worth $370K as of Q2 2026.
Mercury Systems was a new XTX Topco position in Q2 2026.
Mercury Systems made up ﹤0.01% of XTX Topco's portfolio in Q2 2026, its #2721 holding.
XTX Topco first reported a position in Mercury Systems in Q2 2021 and has held it in 7 quarters since.
XTX Topco's Mercury Systems position peaked at $889K in Q4 2025.
392 funds tracked by Wall St. Rank held Mercury Systems as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.