ATN INTERNATIONAL INC (ATNI) Institutional Shareholders
ATN INTERNATIONAL INC (ATNI) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $250.70M in ATNI holdings during the latest filing period.
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 $42.85M, representing an estimated gain of +12.00% 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
132
Total Reported Value
$250.70M
Largest Holder
Global Alpha Capital Management Ltd.
Largest Position
$38.26M
Insider Transactions (90d)
25
Latest Filing Quarter
Q2 2026
New Institutional Positions
128
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 | $42,852,262 | +$4,592,861 | +12.00% | |
| Blackrock, Inc. | 0.00% | 923,255 | $24,457,035 | $27,392,976 | +$2,935,941 | +12.00% | |
| Dimensional Fund Advisors Lp | 0.00% | 727,365 | $19,270,029 | $21,580,920 | +$2,310,891 | +11.99% | |
| Brown Brothers Harriman & Co | 0.08% | 662,544 | $17,550,791 | $19,657,680 | +$2,106,889 | +12.00% | |
| American Century Companies Inc | 0.01% | 573,643 | $15,195,803 | $17,019,988 | +$1,824,185 | +12.00% | |
| Vanguard Capital Management Llc | 0.00% | 414,177 | $10,971,549 | $12,288,632 | +$1,317,083 | +12.00% | |
| Acadian Asset Management Llc | 0.01% | 379,768 | $10,050,000 | $11,267,717 | +$1,217,717 | +12.12% | |
| D. E. Shaw & Co., Inc. | 0.01% | 375,137 | $9,937,380 | $11,130,315 | +$1,192,935 | +12.00% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 320,932 | $8,501,489 | $9,522,052 | +$1,020,563 | +12.00% |
| Morgan Stanley | 0.00% | 277,633 | $7,354,517 | $8,237,371 | +$882,854 | +12.00% | |
| Geode Capital Management, Llc | 0.00% | 270,593 | $7,169,847 | $8,028,494 | +$858,647 | +11.98% | |
| State Street Corp | 0.00% | 221,909 | $5,941,875 | $6,584,040 | +$642,165 | +10.81% | |
| Bridgeway Capital Management, Llc | 0.07% | 147,750 | $3,913,898 | $4,383,743 | +$469,845 | +12.00% | |
| Ballast Asset Management, Lp | 1.44% | 136,243 | $3,609,077 | $4,042,330 | +$433,253 | +12.00% | |
| Fmr Llc | 0.00% | 126,805 | $3,359,064 | $3,762,304 | +$403,240 | +12.00% | |
| Bank Of New York Mellon Corp | 0.00% | 125,447 | $3,323,082 | $3,722,012 | +$398,930 | +12.00% | |
| Northern Trust Corp | 0.00% | 114,153 | $3,023,913 | $3,386,920 | +$363,007 | +12.00% | |
| Gabelli Funds Llc | 0.02% | 109,600 | $2,903,304 | $3,251,832 | +$348,528 | +12.00% | |
| Vanguard Portfolio Management Llc | 0.00% | 103,899 | $2,752,285 | $3,082,683 | +$330,398 | +12.00% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 101,270 | $2,682,642 | $3,004,681 | +$322,039 | +12.00% | |
| Citadel Advisors Llc | 0.00% | 98,451 | $2,607,967 | $2,921,041 | +$313,074 | +12.00% | |
| Empowered Funds, Llc | 0.01% | 93,650 | $2,480,789 | $2,778,596 | +$297,807 | +12.00% | |
| Goldman Sachs Group Inc | 0.00% | 89,949 | $2,382,759 | $2,668,787 | +$286,028 | +12.00% | |
| Charles Schwab Investment Management Inc | 0.00% | 82,304 | $2,180,233 | $2,441,960 | +$261,727 | +12.00% | |
| Two Sigma Investments, Lp | 0.00% | 79,096 | $2,095,253 | $2,346,778 | +$251,525 | +12.00% | |
| O'Shaughnessy Asset Management, Llc | 0.01% | 68,190 | $1,806,353 | $2,023,197 | +$216,844 | +12.00% | |
| Vanguard Fiduciary Trust Co | 0.00% | 66,713 | $1,767,227 | $1,979,375 | +$212,148 | +12.00% | |
| Segall Bryant & Hamill, Llc | 0.02% | 62,364 | $1,652,022 | $1,850,340 | +$198,318 | +12.00% | |
| Jpmorgan Chase & Co | 0.00% | 56,016 | $1,551,083 | $1,661,995 | +$110,912 | +7.15% | |
| Ritholtz Wealth Management | 0.02% | 49,119 | $1,301,162 | $1,457,361 | +$156,199 | +12.00% | |
| Sei Investments Co | 0.00% | 44,729 | $1,184,871 | $1,327,109 | +$142,238 | +12.00% | |
| Aqr Capital Management Llc | 0.00% | 44,179 | $1,170,303 | $1,310,791 | +$140,488 | +12.00% | |
| Gamco Investors, Inc. Et Al | 0.01% | 42,500 | $1,125,825 | $1,260,975 | +$135,150 | +12.00% | |
| Summit Trail Advisors, Llc | 0.01% | 40,219 | $1,065,401 | $1,193,298 | +$127,897 | +12.00% | |
| Federation Des Caisses Desjardins Du Quebec | 0.00% | 39,819 | $1,054,970 | $1,181,430 | +$126,460 | +11.99% | |
| State Of Wisconsin Investment Board | 0.00% | 37,270 | $987,282 | $1,105,801 | +$118,519 | +12.00% | |
| Lazard Asset Management Llc | 0.00% | 33,397 | $884,687 | $990,889 | +$106,202 | +12.00% | |
| Bnp Paribas Financial Markets | 0.00% | 31,272 | $828,395 | $927,840 | +$99,445 | +12.00% | |
| Quantinno Capital Management Lp | 0.00% | 30,692 | $813,043 | $910,632 | +$97,589 | +12.00% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 30,422 | $805,879 | $902,621 | +$96,742 | +12.00% | |
| Janney Montgomery Scott Llc | 0.00% | 29,362 | $778,000 | $871,171 | +$93,171 | +11.98% | |
| Barclays Plc | 0.00% | 28,229 | $747,787 | $837,554 | +$89,767 | +12.00% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 27,907 | $739,256 | $828,001 | +$88,745 | +12.00% | |
| Xtx Topco Ltd | 0.01% | 27,567 | $730,250 | $817,913 | +$87,663 | +12.00% | |
| Voleon Capital Management Lp | 0.01% | 27,262 | $722,170 | $808,864 | +$86,694 | +12.00% | |
| Trexquant Investment Lp | 0.00% | 25,682 | $680,316 | $761,985 | +$81,669 | +12.00% | |
| Bank Of America Corp | 0.00% | 25,580 | $677,614 | $758,959 | +$81,345 | +12.00% | |
| Raymond James Financial Inc | 0.00% | 25,326 | $670,892 | $751,422 | +$80,530 | +12.00% | |
| Ubs Group Ag | 0.00% | 24,592 | $651,442 | $729,645 | +$78,203 | +12.00% | |
| Verdence Capital Advisors Llc | 0.03% | 24,557 | $650,521 | $728,606 | +$78,085 | +12.00% |
Frequently asked questions about ATNI
Who owns the most ATNI stock?
The largest holders of ATNI are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ATN INTERNATIONAL INC (ATNI).
Is ATNI widely held by superinvestors?
Many widely followed stocks like ATNI appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ATNI is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.