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
-$21,418,778
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% $51,528,035 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 54,795 $1,196,223 +$1,019,653 $21.83 7
2025 Q3 15,892,445 $341,210,062 -$21,418,778 $21.47 110
2025 Q2 16,798,194 $430,873,693 +$5,778,849 $25.65 109
2025 Q1 16,354,227 $598,597,088 +$24,643,665 $36.60 128
2024 Q4 15,990,167 $490,412,835 +$4,179,537 $30.67 113
2024 Q3 15,762,630 $593,586,930 +$33,544,074 $37.66 127
2024 Q2 14,976,662 $592,922,823 +$12,607,148 $39.59 112
2024 Q1 14,671,486 $493,164,901 -$3,442,304 $33.61 97
2023 Q4 14,774,749 $492,294,457 -$2,514,906 $33.32 91
2023 Q3 14,875,879 $466,805,252 -$14,453,049 $31.38 96
2023 Q2 15,334,359 $485,963,452 -$3,134,853 $31.69 93
2023 Q1 15,429,877 $509,799,258 -$1,255,532 $33.04 86
2022 Q4 15,489,687 $498,309,599 -$9,985,557 $32.17 91
2022 Q3 15,717,231 $561,424,047 +$25,584,069 $35.72 96
2022 Q2 14,954,246 $614,165,320 -$5,584,480 $41.07 90
2022 Q1 15,103,375 $874,447,504 -$6,381,270 $57.90 105
2021 Q4 15,187,749 $892,021,662 -$15,273,036 $58.76 102
2021 Q3 15,139,014 $918,125,236 -$783,490 $60.70 105
2021 Q2 15,202,979 $912,028,428 -$9,533,969 $59.99 106
2021 Q1 15,500,931 $731,032,284 +$49,980,240 $47.16 96
2020 Q4 16,188,659 $608,687,656 +$12,279,881 $37.60 86
2020 Q3 15,950,453 $521,738,240 -$14,474,223 $32.71 92
2020 Q2 16,236,389 $736,140,456 -$10,250,900 $45.34 101
2020 Q1 16,462,443 $751,832,615 -$24,859,764 $45.67 80
2019 Q4 16,221,458 $700,437,489 +$111,171,052 $43.21 76
2019 Q3 13,668,174 $494,780,224 +$492,846,807 $36.20 71
2019 Q2 53,408 $2,511,000 +$2,511,000 $47.02 2