ATEX: ANTERIX INC. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 5 sales totaling $401K in the last 180 days.
Insider sales
| Trade date | Insider | Role | Value | 10b5-1 plan |
|---|---|---|---|---|
| 2026-10-09 | Marquez Elena | CFO | $261K | yes |
| 2026-10-09 | Marquez Elena | CFO | $33K | yes |
| 2026-10-09 | Marquez Elena | CFO | $8K | yes |
| 2026-10-09 | Marquez Elena | CFO | $82K | yes |
| 2026-10-09 | Marquez Elena | CFO | $17K | yes |
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-07-27 | New 13G stake | BlackRock, Inc. | 5.10% | SEC |
Institutional ownership (Q2 2026)
171 institutions reported holding $1.64B of ANTERIX INC. on Form 13F (132 the quarter before). 56 opened a new position and 16 sold out. Shares held by institutions: +13%.
| Largest holders | Shares | Value |
|---|---|---|
| Owl Creek Asset Management, L.P. | 5,411,776 | $557.09M |
| Heard Capital LLC | 1,716,738 | $176.72M |
| BlackRock, Inc. | 1,075,115 | $110.67M |
| Jupiter Topco LLC | 662,415 | $68.19M |
| VANGUARD CAPITAL MANAGEMENT LLC | 553,002 | $56.93M |
| PLUSTICK MANAGEMENT LLC | 520,000 | $53.53M |
| STATE STREET CORP | 495,950 | $51.05M |
| GAMCO INVESTORS, INC. ET AL | 415,520 | $42.77M |
| GEODE CAPITAL MANAGEMENT, LLC | 388,076 | $39.96M |
| QVT Financial LP | 383,941 | $39.52M |
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