XTX Topco’s Research Frontiers REFR Stock Holding History

XTX Topco’s Portfolio REFR Stock Details REFR Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$29.7K	Buy	32,970 +11,913	+57%	+$13K	﹤0.01%	3453
2025 Q4	$27.6K	Buy	+21,057	New	+$35.6K	﹤0.01%	2989

Other funds holding REFR

MOS

MGO One Seven Beachwood, Ohio $4.98B AUM 22.72% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Focus Partners Wealth Boston, Massachusetts $89.9B AUM 20.5% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

VFT

Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM

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

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

SRC

Shufro Rose & Co New York $1.47B AUM 19.38% 1-Year Est. Return

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

XTX Topco's REFR Position: Q1 2026 in Review

XTX Topco increased its Research Frontiers (REFR) stake by 57% in Q1 2026, buying an estimated $13K and bringing the position to 32,970 shares worth $29.7K. The position accounts for ﹤0.01% of the portfolio, ranked #3453.

XTX Topco first reported a position in REFR in Q4 2025 and has held it in 2 quarters since. 35 funds tracked by Wall St. Rank hold REFR as of Q1 2026.

XTX Topco held 32,970 shares of Research Frontiers worth $29.7K as of Q1 2026.
XTX Topco bought 11,913 Research Frontiers shares in Q1 2026, an estimated $13K.
Research Frontiers made up ﹤0.01% of XTX Topco's portfolio in Q1 2026, its #3453 holding.
XTX Topco first reported a position in Research Frontiers in Q4 2025 and has held it in 2 quarters since.
35 funds tracked by Wall St. Rank held Research Frontiers as of Q1 2026.

Based on XTX Topco's 13F filing for Q1 2026, filed 15 May 2026.