ATNI Institutional Ownership & Shareholders
ATN INTERNATIONAL INC (ATNI) is currently held by 137 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $253.90M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Global Alpha Capital Management Ltd. is currently the largest disclosed institutional shareholder of ATNI tracked by InsiderSet, reporting ownership valued at approximately $38.26M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $40.47M, representing an estimated gain of +5.78% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 64% of the total disclosed ATNI value among the investors covered in this analysis. Major shareholders include Global Alpha Capital Management Ltd., Blackrock, Inc., Dimensional Fund Advisors Lp, and several other long-term asset managers with concentrated positions in ATN INTERNATIONAL INC (ATNI).
This page ranks the largest institutional ATNI shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
137
Total Reported Value
$253.90M
Largest Holder
Global Alpha Capital Management Ltd.
Largest Position
$38.26M
Insider Transactions (90d)
19
Latest Filing Quarter
Q2 2026
New Institutional Positions
96
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Global Alpha Capital Management Ltd. | 2.29% | 1,444,296 | $38,259,401 | $40,469,174 | +$2,209,773 | +5.78% | |
| Blackrock, Inc. | 0.00% | 923,255 | $24,457,035 | $25,869,605 | +$1,412,570 | +5.78% | |
| Dimensional Fund Advisors Lp | 0.00% | 766,444 | $21,322,529 | $21,475,761 | +$153,232 | +0.72% | |
| Brown Brothers Harriman & Co | 0.08% | 662,544 | $17,550,791 | $18,564,483 | +$1,013,692 | +5.78% | |
| American Century Companies Inc | 0.01% | 573,643 | $15,195,803 | $16,073,477 | +$877,674 | +5.78% | |
| Vanguard Capital Management Llc | 0.00% | 414,177 | $10,971,549 | $11,605,240 | +$633,691 | +5.78% | |
| Acadian Asset Management Llc | 0.01% | 379,768 | $10,050,000 | $10,641,099 | +$591,099 | +5.88% | |
| D. E. Shaw & Co., Inc. | 0.01% | 375,137 | $9,937,380 | $10,511,339 | +$573,959 | +5.78% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 320,932 | $8,501,489 | $8,992,515 | +$491,026 | +5.78% |
| Morgan Stanley | 0.00% | 277,633 | $7,354,517 | $7,779,277 | +$424,760 | +5.78% | |
| Geode Capital Management, Llc | 0.00% | 253,067 | $7,042,277 | $7,090,937 | +$48,660 | +0.69% | |
| State Street Corp | 0.00% | 221,909 | $5,941,875 | $6,217,890 | +$276,015 | +4.65% | |
| Bridgeway Capital Management, Llc | 0.07% | 147,750 | $3,913,898 | $4,139,955 | +$226,057 | +5.78% | |
| Ballast Asset Management, Lp | 1.60% | 132,193 | $3,677,609 | $3,704,048 | +$26,439 | +0.72% | |
| Bank Of New York Mellon Corp | 0.00% | 126,918 | $3,530,848 | $3,556,242 | +$25,394 | +0.72% | |
| Northern Trust Corp | 0.00% | 114,153 | $3,023,913 | $3,198,567 | +$174,654 | +5.78% | |
| Gabelli Funds Llc | 0.02% | 109,600 | $2,903,304 | $3,070,992 | +$167,688 | +5.78% | |
| Vanguard Portfolio Management Llc | 0.00% | 103,899 | $2,752,285 | $2,911,250 | +$158,965 | +5.78% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 101,270 | $2,682,642 | $2,837,585 | +$154,943 | +5.78% | |
| Citadel Advisors Llc | 0.00% | 98,451 | $2,607,967 | $2,758,597 | +$150,630 | +5.78% | |
| Empowered Funds, Llc | 0.01% | 93,650 | $2,480,789 | $2,624,073 | +$143,284 | +5.78% | |
| Goldman Sachs Group Inc | 0.00% | 89,949 | $2,382,759 | $2,520,371 | +$137,612 | +5.78% | |
| Charles Schwab Investment Management Inc | 0.00% | 82,304 | $2,180,233 | $2,306,158 | +$125,925 | +5.78% | |
| Two Sigma Investments, Lp | 0.00% | 79,096 | $2,095,253 | $2,216,270 | +$121,017 | +5.78% | |
| Ritholtz Wealth Management | 0.03% | 73,362 | $2,040,938 | $2,055,603 | +$14,665 | +0.72% | |
| Fmr Llc | 0.00% | 91,745 | $1,863,341 | $2,570,695 | +$707,354 | +37.96% | |
| O'Shaughnessy Asset Management, Llc | 0.01% | 68,190 | $1,806,353 | $1,910,684 | +$104,331 | +5.78% | |
| Vanguard Fiduciary Trust Co | 0.00% | 66,713 | $1,767,227 | $1,869,298 | +$102,071 | +5.78% | |
| Segall Bryant & Hamill, Llc | 0.02% | 62,364 | $1,652,022 | $1,747,439 | +$95,417 | +5.78% | |
| Jpmorgan Chase & Co | 0.00% | 56,016 | $1,551,083 | $1,569,568 | +$18,485 | +1.19% | |
| Sei Investments Co | 0.00% | 44,729 | $1,184,871 | $1,253,307 | +$68,436 | +5.78% | |
| Aqr Capital Management Llc | 0.00% | 44,179 | $1,170,303 | $1,237,896 | +$67,593 | +5.78% | |
| Creative Planning | 0.00% | 40,885 | $1,137,421 | $1,145,598 | +$8,177 | +0.72% | |
| Gamco Investors, Inc. Et Al | 0.01% | 42,500 | $1,125,825 | $1,190,850 | +$65,025 | +5.78% | |
| Summit Trail Advisors, Llc | 0.01% | 40,219 | $1,065,401 | $1,126,936 | +$61,535 | +5.78% | |
| Federation Des Caisses Desjardins Du Quebec | 0.00% | 39,819 | $1,054,970 | $1,115,728 | +$60,758 | +5.76% | |
| State Of Wisconsin Investment Board | 0.00% | 37,270 | $987,282 | $1,044,305 | +$57,023 | +5.78% | |
| Lazard Asset Management Llc | 0.00% | 33,397 | $884,687 | $935,784 | +$51,097 | +5.78% | |
| Barclays Plc | 0.00% | 30,891 | $859,388 | $865,566 | +$6,178 | +0.72% | |
| Strs Ohio | 0.00% | 30,400 | $845,728 | $851,808 | +$6,080 | +0.72% | |
| Bnp Paribas Financial Markets | 0.00% | 31,272 | $828,395 | $876,241 | +$47,846 | +5.78% | |
| Quantinno Capital Management Lp | 0.00% | 30,692 | $813,043 | $859,990 | +$46,947 | +5.77% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 30,422 | $805,879 | $852,424 | +$46,545 | +5.78% | |
| Janney Montgomery Scott Llc | 0.00% | 29,362 | $778,000 | $822,723 | +$44,723 | +5.75% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 27,907 | $739,256 | $781,954 | +$42,698 | +5.78% | |
| Xtx Topco Ltd | 0.01% | 27,567 | $730,250 | $772,427 | +$42,177 | +5.78% | |
| Voleon Capital Management Lp | 0.01% | 27,262 | $722,170 | $763,881 | +$41,711 | +5.78% | |
| Verdence Capital Advisors Llc | 0.03% | 25,189 | $700,764 | $705,796 | +$5,032 | +0.72% | |
| Trexquant Investment Lp | 0.00% | 25,682 | $680,316 | $719,610 | +$39,294 | +5.78% | |
| Bank Of America Corp | 0.00% | 25,580 | $677,614 | $716,752 | +$39,138 | +5.78% |
Frequently asked questions about ATNI
Who are the largest institutional holders of ATNI?
The largest institutional holders of ATNI reported in the latest SEC Form 13F filings include Global Alpha Capital Management Ltd., Blackrock, Inc., Dimensional Fund Advisors Lp, Brown Brothers Harriman & Co, and American Century Companies Inc. InsiderSet ranks institutional holders by their latest reported ATNI position.
What is ATNI institutional ownership?
This page tracks ATNI positions reported by institutional investment managers through SEC Form 13F. ATN INTERNATIONAL INC (ATNI) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ATNI?
InsiderSet currently tracks 137 institutional managers reporting ATNI holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ATNI shareholders.
How much ATNI stock do institutions own?
Institutional investment managers disclosed approximately $253.90M in ATNI holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ATNI institutional ownership last updated?
The latest ATNI institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ATNI holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ATNI position after the reporting date.
Are institutions buying or selling ATNI?
Institutional buying and selling can be analyzed by comparing ATNI positions across consecutive 13F reporting periods. InsiderSet's ATNI Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ATNI ownership changes.
How has ATNI institutional ownership changed over time?
InsiderSet tracks ATNI institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.