Anterix Inc.
Anterix Inc. (ATEX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ATEX · as of Mar 31, 2025
Ownership Breakdown
134
Institutional Holders
▲ 15 vs Q4
$598.60M
Total Inst. Value
▲ $108.10M vs Q4
18.73M
Shares Outstanding
freeFloat 97.04%
16.35M
13F Shares Held
▲ 362,073 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ATEX largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
OWL CREEK ASSET MANAGEMENT, L.P. telephone communications (no radiotelephone) | 5.41M | 29.08% | 29.08% | $198.07B | May 15, 2025 | — held |
HEARD CAPITAL LLC telephone communications (no radiotelephone) | 1.72M | 9.22% | 9.22% | $62.83B | May 15, 2025 | ▼ 35.4K |
VANGUARD GROUP INC telephone communications (no radiotelephone) | 1.05M | 5.64% | 5.64% | $38.43B | May 9, 2025 | ▲ 15.0K |
BLACKROCK, INC. telephone communications (no radiotelephone) | 1.00M | 5.38% | 5.38% | $36.65B | May 2, 2025 | ▲ 19.9K |
DG CAPITAL MANAGEMENT, LLC telephone communications (no radiotelephone) | 644.4K | 3.46% | 3.46% | $23.59B | May 14, 2025 | ▲ 215.4K |
QVT FINANCIAL LP telephone communications (no radiotelephone) | 503.9K | 2.71% | 2.71% | $18.44B | May 15, 2025 | — held |
GARNET EQUITY CAPITAL HOLDINGS, INC. telephone communications (no radiotelephone) | 387.4K | 2.08% | 2.08% | $14.18B | May 15, 2025 | ▼ 1.4K |
GEODE CAPITAL MANAGEMENT, LLC telephone communications (no radiotelephone) | 353.0K | 1.90% | 1.90% | $12.92B | May 13, 2025 | ▼ 5.9K |
DIMENSIONAL FUND ADVISORS LP telephone communications (no radiotelephone) | 346.1K | 1.86% | 1.86% | $12.67B | May 13, 2025 | ▼ 43.5K |
STATE STREET CORP telephone communications (no radiotelephone) | 328.1K | 1.76% | 1.76% | $12.01B | May 15, 2025 | ▼ 47.9K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
20
Increased
+1.05M shares6
New Positions
first time holders22
Decreased
−401.4K shares0
Sold Out
fully exitedNet shares change (top 50)
+650.7K
+1.05M / −401.4K
Net new holders
+4
6 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ATEX insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
10
Buy transactions
3
Sell transactions
3.33
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Ashe Gena L Chief Legal Officer & Corp Sec | May 22, 2026 | Tax Withhold | 2,501 | $60.00 | $150.1K | 13.5K | Form 4 ↗ |
Lang Scott A. President and CEO | May 20, 2026 | Award | 72,839 | $60.90 | $4.44M | 72.8K | Form 4 ↗ |
Lang Scott A. President and CEO | May 20, 2026 | Award | 18,210 | — | — | 26.5K | Form 4 ↗ |
Ashe Gena L Chief Legal Officer & Corp Sec | May 20, 2026 | Award | 17,453 | $60.90 | $1.06M | 17.5K | Form 4 ↗ |
Ashe Gena L Chief Legal Officer & Corp Sec | May 20, 2026 | Award | 3,694 | — | — | 16.0K | Form 4 ↗ |
Guttman-McCabe Christopher Chief Reg & Comm Officer | May 20, 2026 | Award | 4,926 | — | — | 46.4K | Form 4 ↗ |
Guttman-McCabe Christopher Chief Reg & Comm Officer | May 20, 2026 | Award | 23,271 | $60.90 | $1.42M | 23.3K | Form 4 ↗ |
Marquez Elena Chief Financial Officer | May 20, 2026 | Award | 3,694 | — | — | 21.5K | Form 4 ↗ |
Marquez Elena Chief Financial Officer | May 20, 2026 | Award | 17,453 | $60.90 | $1.06M | 17.5K | Form 4 ↗ |
Martin Heather Chief Marketing Officer | May 20, 2026 | Award | 3,694 | — | — | 38.3K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Anterix Inc. (ATEX) is primarily owned by institutional investors, who hold approximately 87.3% of total shares outstanding. Company insiders own approximately 2.96%, while retail and public investors account for the remaining 9.74%.
The largest institutional shareholder of Anterix Inc. is OWL CREEK ASSET MANAGEMENT, L.P., holding approximately 5.41 million shares — equal to 29.08% of outstanding shares — as of March 31, 2025.
A total of 134 institutional investors currently hold ATEX stock, with a combined institutional value of approximately $598,597,316 as of the most recent 13F filing period.
Frequently asked questions
ATEX ownershipAnterix Inc. (ATEX) is primarily owned by institutional investors, who hold approximately 87.3% of shares. The largest shareholder is OWL CREEK ASSET MANAGEMENT, L.P. with a 29.08% stake. Company insiders hold 2.96%. Data sourced from SEC Form 13F as of March 31, 2025.