ATN International Inc
Ownership
Ownership Structure
Who owns ATN International Inc (ATNI)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 64.7% of the shares are freely tradable; institutional investors hold 60.9%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Global Alpha Capital Management Ltd. | 9.38 | 1,444,296 | -0.9 | 06/30/2026 |
| BlackRock Inc | 5.86 | 902,189 | -4.2 | 03/31/2026 |
| Dimensional Fund Advisors, Inc. | 4.72 | 727,365 | -2.8 | 06/30/2026 |
| Brown Brothers Harriman & Co | 4.30 | 662,544 | +0.0 | 03/31/2026 |
| American Century Companies Inc | 3.72 | 573,643 | +20.8 | 06/30/2026 |
| Vanguard Capital Management, LLC | 2.74 | 422,303 | +0.0 | 03/31/2026 |
| D. E. Shaw & Co LP | 2.44 | 375,137 | +0.4 | 06/30/2026 |
| Acadian Asset Management LLC | 2.36 | 363,204 | +34,723.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| CC&L Global Alpha - Series A | 4.52 | 696,189 | +0.0 | 07/31/2026 |
| Avantis US Small Cap Value ETF | 3.54 | 545,672 | +0.1 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Prior Cornelius B Jr | 10% Owner | 4,012,344 | 117,160,445 $ | Aug 10, 2026 | both |
| Mabey Mary | SVP AND GENERAL COUNSEL | 60,402 | 1,763,738 $ | Aug 10, 2026 | direct |
| Jacobs Patricia | Director | 19,958 | 582,774 $ | Aug 31, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 3, 2026 | Prior Cornelius B Jr | 10% Owner | Sell | 4,542 | 31.02 | 140,882 |
| Sep 2, 2026 | Prior Cornelius B Jr | 10% Owner | Sell | 2,582 | 31.12 | 80,350 |
| Aug 31, 2026 | Jacobs Patricia | Director | Sell | 1,500 | 30.04 | 45,060 |
| Aug 24, 2026 | Prior Cornelius B Jr | 10% Owner | Sell | 10,000 | 31.34 | 313,389 |
| Aug 20, 2026 | Jacobs Patricia | Director | Sell | 1,000 | 31.14 | 31,140 |
| Aug 20, 2026 | Prior Cornelius B Jr | 10% Owner | Sell | 500 | 31.25 | 15,625 |
| Aug 19, 2026 | Prior Cornelius B Jr | 10% Owner | Sell | 10,000 | 31.86 | 318,617 |
| Aug 18, 2026 | Prior Cornelius B Jr | 10% Owner | Sell | 1,000 | 31.75 | 31,750 |
| Aug 17, 2026 | Prior Cornelius B Jr | 10% Owner | Sell | 5,745 | 31.79 | 182,651 |
| Aug 14, 2026 | Prior Cornelius B Jr | 10% Owner | Sell | 26 | 32.10 | 835 |
| Aug 13, 2026 | Prior Cornelius B Jr | 10% Owner | Sell | 2,500 | 32.05 | 80,125 |
| Aug 10, 2026 | Prior Cornelius B Jr | 10% Owner | Sell | 500 | 33.25 | 16,625 |
| Aug 10, 2026 | Prior Cornelius B Jr | 10% Owner | Sell | 6,500 | 32.49 | 211,213 |
| Aug 10, 2026 | Prior Cornelius B Jr | 10% Owner | Other | 12,000 | 0.00 | – |
| Aug 10, 2026 | Mabey Mary | SVP AND GENERAL COUNSEL | Sell | 5,000 | 32.13 | 160,625 |
| Aug 7, 2026 | Prior Cornelius B Jr | 10% Owner | Sell | 500 | 31.17 | 15,585 |
| Aug 6, 2026 | Prior Cornelius B Jr | 10% Owner | Sell | 500 | 30.25 | 15,125 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.