Anterix Inc. - Common Stock, $0.0001 par value (ATEX) Institutional Ownership

13F Institutional Holders and Ownership History from Q2 2019 to Q4 2025

Type / Class
Equity / Common Stock, $0.0001 par value
Symbol
ATEX on Nasdaq
Shares outstanding
18,613,600
Price per share
$21.83
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
15,892,445
Total reported value
$341,210,062
% of total 13F portfolios
0%
Share change
-913,599
Value change
-$21,418,784
Number of holders
110
Price from insider filings
$21.83
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of Anterix Inc. - Common Stock, $0.0001 par value (ATEX) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Heard Capital LLC 9.4% $57,067,560 1,741,989 Heard Capital LLC 28 Feb 2025
BlackRock, Inc. 5.1% $20,414,578 950,842 BlackRock, Inc. 30 Sep 2025
DG Capital Management, LLC 4% -24% $15,985,360 -$4,963,757 744,544 -24% DG Capital Management, LLC 30 Sep 2025

As of 30 Sep 2025, 110 institutional investors reported holding 15,892,445 shares of Anterix Inc. - Common Stock, $0.0001 par value (ATEX). This represents 85% of the company’s total 18,613,600 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of Anterix Inc. - Common Stock, $0.0001 par value (ATEX) together control 79% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
Owl Creek Asset Management, L.P. 29% 5,411,776 0% 13% $116,190,831
Heard Capital LLC 9.2% 1,716,738 0% 2% $36,858,364
BlackRock, Inc. 5.5% 1,031,735 -9.5% 0% $22,151,349
VANGUARD GROUP INC 5.4% 1,008,377 -3.4% 0% $21,649,854
DG Capital Management, LLC 4% 744,544 -13% 9.2% $15,985,360
QVT Financial LP 2.7% 503,941 0% 1.2% $10,819,613
GARNET EQUITY CAPITAL HOLDINGS, INC. 2.1% 397,395 0% 3.7% $8,532,071
GEODE CAPITAL MANAGEMENT, LLC 1.9% 361,329 -5.8% 0% $7,759,700
GAMCO INVESTORS, INC. ET AL 1.7% 320,070 +17% 0.07% $6,871,903
STATE STREET CORP 1.7% 316,771 -7.9% 0% $6,801,073
DIMENSIONAL FUND ADVISORS LP 1.7% 311,290 -7.7% 0% $6,683,871
FMR LLC 1.5% 287,789 -11% 0% $6,178,829
MARSHALL WACE, LLP 1.5% 286,581 +52% 0.01% $6,152,893
GABELLI FUNDS LLC 1.5% 286,282 +52% 0.04% $6,146,475
SCOGGIN MANAGEMENT LP 1.2% 225,000 -25% 1.9% $4,830,750
AYAL Capital Advisors Ltd 1.1% 208,971 -13% 2.6% $4,486,607
Qube Research & Technologies Ltd 1.1% 203,589 +0.22% 0.01% $4,371,056
GOLDMAN SACHS GROUP INC 0.88% 163,452 +84% 0% $3,509,314
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.74% 138,078 -0.48% 0% $2,964,535
BANK OF AMERICA CORP /DE/ 0.73% 136,489 -35% 0% $2,930,420
D. E. Shaw & Co., Inc. 0.7% 131,075 -44% 0% $2,814,180
TUDOR INVESTMENT CORP ET AL 0.69% 128,681 +9.8% 0.02% $2,762,781
NORTHERN TRUST CORP 0.63% 117,005 -16% 0% $2,512,097
CITADEL ADVISORS LLC 0.6% 111,094 -59% 0% $2,385,188
KIRR MARBACH & CO LLC /IN/ 0.52% 96,849 +0.11% 0.38% $2,079,349

Institutional Holders of Anterix Inc. - Common Stock, $0.0001 par value (ATEX) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 85,311 $1,862,388 +$1,021,181 $21.83 10
2025 Q3 15,892,445 $341,210,062 -$21,418,784 $21.47 110
2025 Q2 16,798,194 $430,873,693 +$5,778,850 $25.65 109
2025 Q1 16,354,227 $598,596,939 +$24,643,648 $36.60 128
2024 Q4 15,990,167 $490,413,847 +$4,179,621 $30.67 113
2024 Q3 15,762,630 $593,587,227 +$33,520,074 $37.66 127
2024 Q2 14,977,299 $592,947,900 +$12,632,365 $39.59 113
2024 Q1 14,671,486 $493,165,239 -$4,431,786 $33.61 98
2023 Q4 14,770,888 $492,166,096 -$8,237,512 $33.32 90
2023 Q3 14,874,051 $466,748,048 -$14,457,959 $31.38 95
2023 Q2 15,334,359 $485,963,013 -$3,134,852 $31.69 93
2023 Q1 15,429,877 $509,799,733 -$1,255,702 $33.04 86
2022 Q4 15,482,689 $498,084,799 -$9,986,767 $32.17 91
2022 Q3 14,440,378 $515,814,078 +$26,769,019 $35.72 94
2022 Q2 13,662,425 $560,756,673 -$3,667,638 $41.07 88
2022 Q1 15,102,469 $874,394,504 -$5,092,796 $57.90 103
2021 Q4 13,768,405 $808,621,662 -$19,600,237 $58.76 100
2021 Q3 15,186,797 $919,668,236 -$1,041,755 $60.70 106
2021 Q2 15,194,718 $911,532,428 -$9,329,667 $59.99 105
2021 Q1 15,487,795 $730,413,284 +$50,507,493 $47.16 95
2020 Q4 16,176,952 $608,247,656 +$12,180,008 $37.60 84
2020 Q3 15,934,899 $521,224,240 -$13,612,047 $32.71 90
2020 Q2 16,201,294 $734,548,456 -$10,469,822 $45.34 100
2020 Q1 16,432,181 $750,450,615 -$25,949,650 $45.67 79
2019 Q4 16,214,550 $700,139,489 +$111,151,348 $43.21 74
2019 Q3 13,657,092 $494,380,224 +$492,446,924 $36.20 70
2019 Q2 53,408 $2,511,000 +$2,510,998 $47.02 2