Ken Griffin
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Ken Griffin’s Anterix ATEX Stock Holding History

Ken Griffin’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 		$1.8M Buy
+47,100
New +$1.49M ﹤0.01% 6304
2025
Q3 		– Sell
-14,800
Closed -$380K – 12718
2025
Q2 		$380K Buy
14,800
+3,500
+31% +$102K ﹤0.01% 9270
2025
Q1 		$414K Sell
11,300
-1,600
-12% -$55K ﹤0.01% 8899
2024
Q4 		$396K Buy
12,900
+3,200
+33% +$106K ﹤0.01% 9080
2024
Q3 		$365K Sell
9,700
-3,600
-27% -$139K ﹤0.01% 8900
2024
Q2 		$527K Buy
13,300
+3,000
+29% +$97.1K ﹤0.01% 7944
2024
Q1 		$346K Sell
10,300
-11,600
-53% -$390K ﹤0.01% 9168
2023
Q4 		$730K Sell
21,900
-30,100
-58% -$971K ﹤0.01% 7300
2023
Q3 		$1.63M Buy
52,000
+34,400
+195% +$1.08M ﹤0.01% 5583
2023
Q2 		$558K Sell
17,600
-3,900
-18% -$126K ﹤0.01% 7709
2023
Q1 		$710K Sell
21,500
-14,000
-39% -$459K ﹤0.01% 7533
2022
Q4 		$1.14M Buy
35,500
+17,200
+94% +$586K ﹤0.01% 6554
2022
Q3 		$654K Buy
+18,300
New +$760K ﹤0.01% 7885
2022
Q2 		– Sell
-5,200
Closed -$301K – 12826
2022
Q1 		$301K Buy
5,200
+300
+6% +$16.4K ﹤0.01% 10586
2021
Q4 		$288K Sell
4,900
-2,100
-30% -$127K ﹤0.01% 11012
2021
Q3 		$425K Sell
7,000
-47,100
-87% -$2.76M ﹤0.01% 10264
2021
Q2 		$3.25M Sell
54,100
-40,000
-43% -$2M ﹤0.01% 5413
2021
Q1 		$4.44M Buy
94,100
+32,200
+52% +$1.33M ﹤0.01% 4523
2020
Q4 		$2.33M Sell
61,900
-122,600
-66% -$4.04M ﹤0.01% 5041
2020
Q3 		$6.04M Buy
184,500
+130,500
+242% +$5.52M ﹤0.01% 2889
2020
Q2 		$2.45M Buy
54,000
+45,000
+500% +$2.3M ﹤0.01% 4205
2020
Q1 		$411K Buy
+9,000
New +$407K ﹤0.01% 6780

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 $2.34B AUM 46.76% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
QF
QVT Financial New York $1.37B AUM 148.1% 1-Year Est. Return
PM
Plustick Management Charlottesville, Virginia $207M AUM 253.94% 1-Year Est. Return
GI
GAMCO Investors Greenwich, Connecticut $10.2B AUM 30.27% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Jane Street
Jane Street New York $777B AUM 61.18% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Ken Griffin's ATEX Position: Q1 2026 in Review

Ken Griffin increased its Anterix (ATEX) stake by 49% in Q1 2026, buying an estimated $1.67M and bringing the position to 161,163 shares worth $6.15M. The position accounts for ﹤0.01% of the portfolio, ranked #4008.

Ken Griffin first reported a position in ATEX in Q2 2018 and has held it in 27 quarters since. The position peaked at $9.12M in Q1 2025. 132 funds tracked by Wall St. Rank hold ATEX as of Q1 2026.

  • Ken Griffin held 161,163 shares of Anterix worth $6.15M as of Q1 2026.
  • Ken Griffin bought 52,783 Anterix shares in Q1 2026, an estimated $1.67M.
  • Anterix made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #4008 holding.
  • Ken Griffin first reported a position in Anterix in Q2 2018 and has held it in 27 quarters since.
  • Ken Griffin's Anterix position peaked at $9.12M in Q1 2025.
  • 132 funds tracked by Wall St. Rank held Anterix as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.