ATEX
Anterix Inc. · Communication Services · Telecommunications Services
Momentum inputs (comparable managers):
holder breadth +7.7% ·
share flow -7.8% ·
net new positions +7.1%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 71 | +19 | 5.99M | $615.39M | +20 | −1 |
| Q1 2026 | 54 | -2 | 5.69M | $217.28M | +5 | −7 |
| Q4 2025 | 56 | 0 | 6.02M | $131.47M | +1 | −1 |
| Q3 2025 | 14 | +1 | 4.16M | $89.22M | +1 | — |
| Q2 2025 | 10 | -1 | 4.26M | $109.24M | — | −1 |
| Q1 2025 | 8 | -1 | 1.63M | $59.82M | — | −1 |
| Q4 2024 | 9 | +1 | 1.39M | $42.60M | +1 | — |
| Q3 2024 | 7 | -1 | 1.10M | $41.51M | — | −1 |
| Q2 2024 | 8 | — | 837.23K | $33.15M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 1.03M | -9.5% | $22.15M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 1.03M | -9.5% | $22.15M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 1.03M | -9.5% | $22.15M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 1.03M | -9.5% | $22.15M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 1.03M | -9.5% | $22.15M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 1.03M | -9.5% | $22.15M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 1.03M | -9.5% | $22.15M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 1.03M | -9.5% | $22.15M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 9 | The Vanguard Group ✦ (passive) | 1.01M | -3.4% | $21.65M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 10 | The Vanguard Group ✦ (passive) | 1.01M | -3.4% | $21.65M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 11 | The Vanguard Group ✦ (passive) | 1.01M | -3.4% | $21.65M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 12 | Geode Capital Management ✦ (passive) | 361.33K | -5.8% | $7.76M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 13 | Geode Capital Management ✦ (passive) | 361.33K | -5.8% | $7.76M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 14 | GAMCO Investors ✦ | 320.07K | +17.1% | $6.87M | 0.1% | ▲ Add | 6 | SEC ↗ |
| 15 | State Street Global Advisors ✦ (passive) | 316.77K | -7.9% | $6.80M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 16 | Fidelity (FMR) ✦ | 287.79K | -10.6% | $6.18M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 17 | Fidelity (FMR) ✦ | 287.79K | -10.6% | $6.18M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 18 | Marshall Wace ✦ | 286.58K | +51.6% | $6.15M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 19 | Marshall Wace ✦ | 286.58K | +51.6% | $6.15M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 20 | Goldman Sachs Group ✦ | 163.45K | — | $3.51M | 0.0% | n/c | 1 | SEC ↗ |
| 21 | Goldman Sachs Group ✦ | 163.45K | — | $3.51M | 0.0% | n/c | 1 | SEC ↗ |
| 22 | D. E. Shaw & Co. ✦ | 131.07K | -43.6% | $2.81M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 23 | D. E. Shaw & Co. ✦ | 131.07K | -43.6% | $2.81M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 24 | Citadel Advisors ✦ | 111.09K | -59.3% | $2.39M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 25 | Citadel Advisors ✦ | 111.09K | -59.3% | $2.39M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 26 | Morgan Stanley ✦ | 72.44K | — | $1.56M | 0.0% | n/c | 1 | SEC ↗ |
| 27 | Morgan Stanley ✦ | 72.44K | — | $1.56M | 0.0% | n/c | 1 | SEC ↗ |
| 28 | Morgan Stanley ✦ | 72.44K | — | $1.56M | 0.0% | n/c | 1 | SEC ↗ |
| 29 | Morgan Stanley ✦ | 72.44K | — | $1.56M | 0.0% | n/c | 1 | SEC ↗ |
| 30 | Morgan Stanley ✦ | 72.44K | — | $1.56M | 0.0% | n/c | 1 | SEC ↗ |
| 31 | Morgan Stanley ✦ | 72.44K | — | $1.56M | 0.0% | n/c | 1 | SEC ↗ |
| 32 | Morgan Stanley ✦ | 72.44K | — | $1.56M | 0.0% | n/c | 1 | SEC ↗ |
| 33 | Millennium Management ✦ | 35.11K | -39.0% | $753,769 | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 34 | AQR Capital Management ✦ | 19.46K | New | $417,785 | 0.0% | New | 1 | SEC ↗ |
| 35 | AQR Capital Management ✦ | 19.46K | New | $417,785 | 0.0% | New | 1 | SEC ↗ |
| 36 | AQR Capital Management ✦ | 19.46K | New | $417,785 | 0.0% | New | 1 | SEC ↗ |
| 37 | AQR Capital Management ✦ | 19.46K | New | $417,785 | 0.0% | New | 1 | SEC ↗ |
| 38 | JPMorgan Chase ✦ | 9.99K | — | $214,400 | 0.0% | n/c | 1 | SEC ↗ |
| 39 | JPMorgan Chase ✦ | 9.99K | — | $214,400 | 0.0% | n/c | 1 | SEC ↗ |
| 40 | JPMorgan Chase ✦ | 9.99K | — | $214,400 | 0.0% | n/c | 1 | SEC ↗ |
| 41 | JPMorgan Chase ✦ | 9.99K | — | $214,400 | 0.0% | n/c | 1 | SEC ↗ |
| 42 | JPMorgan Chase ✦ | 9.99K | — | $214,400 | 0.0% | n/c | 1 | SEC ↗ |
| 43 | JPMorgan Chase ✦ | 9.99K | — | $214,400 | 0.0% | n/c | 1 | SEC ↗ |
| 44 | JPMorgan Chase ✦ | 9.99K | — | $214,400 | 0.0% | n/c | 1 | SEC ↗ |
| 45 | JPMorgan Chase ✦ | 9.99K | — | $214,400 | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| AQR Capital Management | $417,785 | 0.0% |
| AQR Capital Management | $417,785 | 0.0% |
| AQR Capital Management | $417,785 | 0.0% |
| AQR Capital Management | $417,785 | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 131 holders, 16.93M shares, $637.88M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Director · 46.40K sh · $4.18M
Officer, Director · 800 sh · $73,352
Officer, Director · 10.09K sh · $916,603
Officer, Director · 18.80K sh · $1.69M
Officer, Director · 5.37K sh · $478,006
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
27.7% of class · View original SEC filing ↗