Security Snapshot

Anterix Inc. - Common Stock (ATEX) Institutional Ownership

CUSIP: 03676C100

13F Institutional Holders and Ownership History from Q2 2019 to Q1 2026

Latest Period

Q4 2025

Institutions Reporting

116

Shares (Excl. Options)

16,180,534

Price

$21.83

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Type / Class
Equity / Common Stock
Symbol
ATEX on Nasdaq
Shares outstanding
18,738,531
Price per share
$38.19
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
16,180,534
Total reported value
$353,310,211
% of total 13F portfolios
0%
Share change
-44,764
Value change
-$760,647
Number of holders
116
Price from insider filings
$38.19
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

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Quick Takeaways

  • ATEX - Anterix Inc. - Common Stock is tracked under CUSIP 03676C100.
  • 116 institutions reported positions in Q4 2025.
  • 4 significant owners is listed from Schedule 13D/13G reporting.

What Changed

  • Holder count moved from 116 to 9 between Q4 2025 and Q1 2026.
  • Reported value moved from $353,310,211 to $740,516.

Why This Matters

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Source Evidence

Source: SEC Form 13F

Latest holder context comes from 116 institutions filings for Q4 2025.

Open SEC Evidence

Investment Quick Answers

What is CUSIP 03676C100?
CUSIP 03676C100 identifies ATEX - Anterix Inc. - Common Stock in SEC 13F datasets.

Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.

Significant Owners of Anterix Inc. - Common Stock (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
VANGUARD GROUP INC 5% $20,330,854 931,305 The Vanguard Group 31 Dec 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 31 Dec 2025, 116 institutional investors reported holding 16,180,534 shares of Anterix Inc. - Common Stock (ATEX). This represents 86% of the company’s total 18,738,531 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of Anterix Inc. - Common Stock (ATEX) together control 77% 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% 14% $118,139,070
Heard Capital LLC 9.2% 1,716,738 0% 1.8% $37,476,391
BlackRock, Inc. 5.4% 1,018,275 -1.3% 0% $22,228,954
VANGUARD GROUP INC 5% 931,305 -7.6% 0% $20,330,388
QVT Financial LP 2.7% 503,941 0% 1% $11,001,032
Jefferies Financial Group Inc. 2.4% 454,508 0.08% $9,921,910
MILLENNIUM MANAGEMENT LLC 2.3% 439,946 +1153% 0.01% $9,604,021
GAMCO INVESTORS, INC. ET AL 2.3% 422,470 +32% 0.09% $9,222,520
GARNET EQUITY CAPITAL HOLDINGS, INC. 2.1% 397,395 0% 4.3% $8,675,133
GEODE CAPITAL MANAGEMENT, LLC 1.9% 360,139 -0.33% 0% $7,863,736
STATE STREET CORP 1.8% 333,788 +5.4% 0% $7,286,592
DIMENSIONAL FUND ADVISORS LP 1.7% 324,923 +4.4% 0% $7,092,536
GABELLI FUNDS LLC 1.6% 304,907 +6.5% 0.05% $6,656,120
MARSHALL WACE, LLP 1.6% 291,255 +1.6% 0.01% $6,358,098
AYAL Capital Advisors Ltd 1.4% 265,000 +27% 3.2% $5,784,950
Potomac Capital Management, Inc. 0.86% 161,400 0% 2.9% $3,523,362
JANE STREET GROUP, LLC 0.85% 159,014 +276% 0% $3,471,275
Beartown Capital Management, LLC 0.77% 145,000 0% 2.5% $3,165,350
BANK OF AMERICA CORP /DE/ 0.76% 143,124 +4.9% 0% $3,124,397
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.74% 138,677 +0.43% 0% $3,027,319
TUDOR INVESTMENT CORP ET AL 0.67% 124,943 -2.9% 0.01% $2,727,506
Qube Research & Technologies Ltd 0.67% 124,646 -39% 0% $2,721,022
GOLDMAN SACHS GROUP INC 0.67% 124,630 -24% 0% $2,720,673
NORTHERN TRUST CORP 0.61% 114,262 -2.3% 0% $2,494,339
MORGAN STANLEY 0.58% 109,445 +51% 0% $2,389,185

Institutional Holders of Anterix Inc. - Common Stock (ATEX) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 19,401 $740,516 +$494,880 $38.19 9
2025 Q4 16,180,534 $353,310,211 -$760,647 $21.83 116
2025 Q3 15,892,445 $341,210,062 -$21,494,095 $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

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