Latest Period
Q4 2025
Security Snapshot
Anterix Inc. - Common Stock (ATEX) Institutional Ownership
CUSIP: 03676C100
13F Institutional Holders and Ownership History from Q2 2019 to Q1 2026
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
- 18,768,052
- Price per share
- $35.89
- 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
- $35.89
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
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 45 between Q4 2025 and Q1 2026.
- Reported value moved from $353,310,211 to $71,750,496.
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
Open SEC Evidence
Latest holder context comes from 116 institutions filings for Q4 2025.
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.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 03676C100:
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% | -2.4% | $35,694,245 | -$618,411 | 934,649 | -1.7% | BlackRock, Inc. | 31 Mar 2026 |
| 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 18,768,052 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 | 9.1% | 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 | 0.66% | 124,646 | -39% | 0% | $2,721,022 |
| GOLDMAN SACHS GROUP INC | 0.66% | 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 | 1,878,853 | $71,750,496 | -$2,640,228 | $38.19 | 45 |
| 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 |