Optiver Holding’s Anterix ATEX Stock Holding History

Optiver Holding’s Portfolio ATEX Stock Details ATEX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$3.82K	Sell	100 -24	-19%	-$759	﹤0.01%	1547
2025 Q4	$2.71K	Hold	124	–	–	﹤0.01%	1825
2025 Q3	$2.66K	Buy	+124	New	+$2.78K	﹤0.01%	2254

Other funds holding ATEX

OCAM

Owl Creek Asset Management New York $1.38B AUM 59.67% 1-Year Est. Return

HCL

Heard Capital LLC Chicago, Illinois $1.93B AUM 21.66% 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

QVT Financial New York $1.37B AUM 148.1% 1-Year Est. Return

Plustick Management Charlottesville, Virginia $207M AUM 253.94% 1-Year Est. Return

GAMCO Investors Greenwich, Connecticut $10.2B AUM 30.27% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

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

Optiver Holding's ATEX Position: Q1 2026 in Review

Optiver Holding reduced its Anterix (ATEX) stake by 19% in Q1 2026, selling an estimated $759 and leaving 100 shares worth $3.82K. The position accounts for ﹤0.01% of the portfolio, ranked #1547.

Optiver Holding first reported a position in ATEX in Q3 2025 and has held it in 3 quarters since. 132 funds tracked by Wall St. Rank hold ATEX as of Q1 2026.

Optiver Holding held 100 shares of Anterix worth $3.82K as of Q1 2026.
Optiver Holding sold 24 Anterix shares in Q1 2026, an estimated $759.
Anterix made up ﹤0.01% of Optiver Holding's portfolio in Q1 2026, its #1547 holding.
Optiver Holding first reported a position in Anterix in Q3 2025 and has held it in 3 quarters since.
132 funds tracked by Wall St. Rank held Anterix as of Q1 2026.

Based on Optiver Holding's 13F filing for Q1 2026, filed 15 May 2026.