ANTERIX INC (ATEX): Ownership & Insider Activity
Hedge funds and institutional managers reporting a position in ATEX · Communication Services. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
12
13F filers
Aggregate Value
$61.6M
Across holders
Last Price
$90.38
2026-08-24
Sector
Communication Services
GICS
Quarterly fund activity9 increased3 reduced2 exited
Full exits: Schonfeld Strategic Advisors LLC, Squarepoint Ops LLC
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| GAMCO INVESTORS, INC. ET AL CIK 0000807249 | Institutional Manager | 416K | $42.8M | 69.4% | 0.4% | Reduced | $-1.1M | Q2 2026 |
| SHAW D E & CO INC CIK 0001009207 | Hedge Fund | 93K | $9.6M | 15.5% | 0.0% | Added | +$9.0M | Q2 2026 |
| MILLENNIUM MANAGEMENT LLC CIK 0001273087 | Hedge Fund | 30K | $3.1M | 5.1% | 0.0% | Reduced | $-28.6M | Q2 2026 |
| AQR CAPITAL MANAGEMENT LLC CIK 0001167557 | Hedge Fund | 13K | $1.4M | 2.2% | 0.0% | Added | $-3.0M | Q2 2026 |
| CAXTON ASSOCIATES LLP CIK 0002051323 | Hedge Fund | 13K | $1.4M | 2.2% | 0.0% | Added | — | Q2 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 9K | $928K | 1.5% | 0.0% | Reduced | $-760K | Q2 2026 |
| Gotham Asset Management, LLC CIK 0001510387 | Hedge Fund | 9K | $913K | 1.5% | 0.0% | Added | — | Q2 2026 |
| Brevan Howard Capital Management LP CIK 0001512857 | Hedge Fund | 4K | $415K | 0.7% | 0.0% | Added | — | Q2 2026 |
| MARSHALL WACE, LLP CIK 0001318757 | Hedge Fund | 4K | $387K | 0.6% | 0.0% | Added | — | Q2 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 4K | $383K | 0.6% | 0.0% | Added | — | Q2 2026 |
Reduced
Institutional Manager
$42.8M· 69.4% of total· 0.4% port· 416K sh· $-1.1M QoQ· Q2 2026
Added
Hedge Fund
$9.6M· 15.5% of total· 0.0% port· 93K sh· +$9.0M QoQ· Q2 2026
Reduced
Hedge Fund
$3.1M· 5.1% of total· 0.0% port· 30K sh· $-28.6M QoQ· Q2 2026
Added
Hedge Fund
$1.4M· 2.2% of total· 0.0% port· 13K sh· $-3.0M QoQ· Q2 2026
Added
Hedge Fund
$1.4M· 2.2% of total· 0.0% port· 13K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$928K· 1.5% of total· 0.0% port· 9K sh· $-760K QoQ· Q2 2026
Added
Hedge Fund
$913K· 1.5% of total· 0.0% port· 9K sh· — QoQ· Q2 2026
Added
Hedge Fund
$415K· 0.7% of total· 0.0% port· 4K sh· — QoQ· Q2 2026
Added
Hedge Fund
$387K· 0.6% of total· 0.0% port· 4K sh· — QoQ· Q2 2026
Added
Hedge Fund
$383K· 0.6% of total· 0.0% port· 4K sh· — QoQ· Q2 2026
Added
Hedge Fund
$335K· 0.5% of total· 0.0% port· 3K sh· — QoQ· Q2 2026
Added
Hedge Fund
$15K· 0.0% of total· 0.0% port· 148 sh· — QoQ· Q2 2026
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