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 | n/a |
| Q2 2025 | 10 | -1 | 4.26M | $109.24M | n/a | −1 |
| Q1 2025 | 8 | -1 | 1.63M | $59.82M | n/a | −1 |
| Q4 2024 | 9 | +1 | 1.39M | $42.60M | +1 | n/a |
| Q3 2024 | 7 | -1 | 1.10M | $41.51M | n/a | −1 |
| Q2 2024 | 8 | n/a | 837.23K | $33.15M | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 1.03M | -9.5% | $22.15M | 0.0% | ▼ Trim | 2 | SEC ↗ ×8 |
| 2 | The Vanguard Group ✦ (passive) | 1.01M | -3.4% | $21.65M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 3 | Geode Capital Management ✦ (passive) | 361.33K | -5.8% | $7.76M | 0.0% | ▼ Trim | 6 | SEC ↗ ×2 |
| 4 | GAMCO Investors ✦ | 320.07K | +17.1% | $6.87M | 0.1% | ▲ Add | 6 | SEC ↗ |
| 5 | State Street Global Advisors ✦ (passive) | 316.77K | -7.9% | $6.80M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 6 | Fidelity (FMR) ✦ | 287.79K | -10.6% | $6.18M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 7 | Marshall Wace ✦ | 286.58K | +51.6% | $6.15M | 0.0% | ▲ Add | 6 | SEC ↗ ×2 |
| 8 | Goldman Sachs Group ✦ | 163.45K | n/a | $3.51M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 9 | D. E. Shaw & Co. ✦ | 131.07K | -43.6% | $2.81M | 0.0% | ▼ Trim | 6 | SEC ↗ ×2 |
| 10 | Citadel Advisors ✦ | 111.09K | -59.3% | $2.39M | 0.0% | ▼ Trim | 6 | SEC ↗ ×2 |
| 11 | Morgan Stanley ✦ | 72.44K | n/a | $1.56M | 0.0% | n/c | 1 | SEC ↗ ×7 |
| 12 | Millennium Management ✦ | 35.11K | -39.0% | $753,769 | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 13 | AQR Capital Management ✦ | 19.46K | New | $417,785 | 0.0% | New | 1 | SEC ↗ ×4 |
| 14 | JPMorgan Chase ✦ | 9.99K | n/a | $214,400 | 0.0% | n/c | 1 | SEC ↗ ×8 |
“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% |
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)
Officer · 400 sh · $32,720
Officer · 3.25K sh · $260,849
Officer · 210 sh · $17,199
Officer · 1.02K sh · $81,589
Officer · 100 sh · $8,250
Officer, Director · 15.00K sh · $1.20M
Director · 2.50K sh · $209,575
Officer · 8.06K sh · $678,998
Officer · 4.06K sh · $347,228
Officer · 293 sh · $25,034
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
27.7% of class · View original SEC filing ↗