ATN INTERNATIONAL INC (ATNI) Top 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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $236.77M 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 $39.66M in its March 31, 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 $37.39M, representing an estimated loss of -5.73% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 68% 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
121
Total Reported Value
$236.77M
Largest Holder
Global Alpha Capital Management Ltd.
Largest Position
$39.66M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
137
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. | 2.39% | 1,456,998 | $39,659,486 | $37,386,569 | -$2,272,917 | -5.73% | |
| Blackrock, Inc. | 0.00% | 902,189 | $24,557,585 | $23,150,170 | -$1,407,415 | -5.73% | |
| Dimensional Fund Advisors Lp | 0.00% | 748,312 | $20,369,956 | $19,201,686 | -$1,168,270 | -5.74% | |
| Brown Brothers Harriman & Co | 0.10% | 662,544 | $18,034,448 | $17,000,879 | -$1,033,569 | -5.73% | |
| American Century Companies Inc | 0.01% | 474,944 | $12,927,976 | $12,187,063 | -$740,913 | -5.73% | |
| Vanguard Capital Management Llc | 0.00% | 422,303 | $11,495,088 | $10,836,295 | -$658,793 | -5.73% | |
| D. E. Shaw & Co., Inc. | 0.01% | 373,571 | $10,168,603 | $9,585,832 | -$582,771 | -5.73% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 337,735 | $9,193,147 | $8,666,280 | -$526,867 | -5.73% |
| Morgan Stanley | 0.00% | 280,865 | $7,645,167 | $7,206,996 | -$438,171 | -5.73% | |
| Geode Capital Management, Llc | 0.00% | 252,016 | $6,861,642 | $6,466,731 | -$394,911 | -5.76% | |
| State Street Corp | 0.00% | 227,527 | $6,255,212 | $5,838,343 | -$416,869 | -6.66% | |
| Bridgeway Capital Management, Llc | 0.08% | 147,750 | $4,021,755 | $3,791,265 | -$230,490 | -5.73% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 139,046 | $3,784,832 | $3,567,920 | -$216,912 | -5.73% | |
| Ballast Asset Management, Lp | 1.67% | 137,593 | $3,745,281 | $3,530,636 | -$214,645 | -5.73% | |
| Bank Of New York Mellon Corp | 0.00% | 122,634 | $3,338,087 | $3,146,788 | -$191,299 | -5.73% | |
| Gabelli Funds Llc | 0.02% | 116,373 | $3,167,673 | $2,986,131 | -$181,542 | -5.73% | |
| Fmr Llc | 0.00% | 107,013 | $2,912,894 | $2,745,954 | -$166,940 | -5.73% | |
| Vanguard Portfolio Management Llc | 0.00% | 94,958 | $2,584,757 | $2,436,622 | -$148,135 | -5.73% | |
| Empowered Funds, Llc | 0.02% | 93,650 | $2,549,153 | $2,403,059 | -$146,094 | -5.73% | |
| Sei Investments Co | 0.00% | 85,747 | $2,334,033 | $2,200,268 | -$133,765 | -5.73% | |
| Northern Trust Corp | 0.00% | 83,690 | $2,278,042 | $2,147,485 | -$130,557 | -5.73% | |
| Charles Schwab Investment Management Inc | 0.00% | 81,574 | $2,220,444 | $2,093,189 | -$127,255 | -5.73% | |
| Goldman Sachs Group Inc | 0.00% | 74,972 | $2,040,748 | $1,923,782 | -$116,966 | -5.73% | |
| Trexquant Investment Lp | 0.01% | 68,478 | $1,863,971 | $1,757,145 | -$106,826 | -5.73% | |
| Vanguard Fiduciary Trust Co | 0.00% | 64,170 | $1,746,707 | $1,646,602 | -$100,105 | -5.73% | |
| Two Sigma Investments, Lp | 0.00% | 55,480 | $1,510,166 | $1,423,617 | -$86,549 | -5.73% | |
| Empirical Finance, Llc | 0.06% | 45,343 | $1,234,236 | $1,163,501 | -$70,735 | -5.73% | |
| Gamco Investors, Inc. Et Al | 0.01% | 42,613 | $1,159,926 | $1,093,450 | -$66,476 | -5.73% | |
| Franklin Resources Inc | 0.00% | 40,785 | $1,110,168 | $1,046,543 | -$63,625 | -5.73% | |
| Federation Des Caisses Desjardins Du Quebec | 0.00% | 39,780 | $1,082,812 | $1,020,755 | -$62,057 | -5.73% | |
| Citadel Advisors Llc | 0.00% | 38,577 | $1,050,066 | $989,886 | -$60,180 | -5.73% | |
| Summit Trail Advisors, Llc | 0.01% | 35,229 | $958,933 | $903,976 | -$54,957 | -5.73% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 32,033 | $871,938 | $821,967 | -$49,971 | -5.73% | |
| Ubs Group Ag | 0.00% | 31,639 | $861,214 | $811,857 | -$49,357 | -5.73% | |
| Lazard Asset Management Llc | 0.00% | 30,629 | $833,721 | $785,940 | -$47,781 | -5.73% | |
| Jane Street Group, Llc | 0.00% | 30,594 | $832,768 | $785,042 | -$47,726 | -5.73% | |
| Barclays Plc | 0.00% | 29,703 | $808,516 | $762,179 | -$46,337 | -5.73% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 28,912 | $786,985 | $741,882 | -$45,103 | -5.73% | |
| Bank Of America Corp | 0.00% | 28,707 | $781,405 | $736,622 | -$44,783 | -5.73% | |
| Quantinno Capital Management Lp | 0.00% | 27,857 | $758,279 | $714,811 | -$43,468 | -5.73% | |
| Voleon Capital Management Lp | 0.02% | 27,225 | $741,065 | $698,594 | -$42,472 | -5.73% | |
| Bnp Paribas Financial Markets | 0.00% | 27,218 | $740,874 | $698,414 | -$42,460 | -5.73% | |
| Raymond James Financial Inc | 0.00% | 26,087 | $710,091 | $669,392 | -$40,699 | -5.73% | |
| Segall Bryant & Hamill, Llc | 0.01% | 29,341 | $702,717 | $752,890 | +$50,173 | +7.14% | |
| Engineers Gate Manager Lp | 0.01% | 25,782 | $701,786 | $661,566 | -$40,220 | -5.73% | |
| Verdence Capital Advisors Llc | 0.04% | 25,287 | $688,312 | $648,864 | -$39,448 | -5.73% | |
| Hsbc Holdings Plc | 0.00% | 23,018 | $630,693 | $590,642 | -$40,051 | -6.35% | |
| State Of Wisconsin Investment Board | 0.00% | 20,447 | $556,567 | $524,670 | -$31,897 | -5.73% | |
| Nuveen, Llc | 0.00% | 19,772 | $538,194 | $507,350 | -$30,844 | -5.73% | |
| Xtx Topco Ltd | 0.01% | 19,339 | $526,408 | $496,239 | -$30,169 | -5.73% |
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.