ATN International, Inc.
US ˙ NasdaqGS ˙ US00215F1075

SecurityATNI / ATN International, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership39,844 shares
Latest Disclosed Value $ 908,443
Sei Investments Co ownership in ATNI / ATN International, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 39,844 shares of ATN International, Inc. (US:ATNI) valued at $908,443 USD as of December 31, 2025. The entity filed a previous 13F-HR on February 11, 2025 disclosing 0 shares of ATN International, Inc.. The current value of the position is $1,025,983 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-02-13 2025-12-31 13F ATN INTL COM 00215F107 39,844 39,844 908 0.0009
2025-02-11 2024-12-31 13F ATN INTL COM 00215F107 0 -7,342 -100.00 0 -100.00
2024-11-12 2024-09-30 13F ATN INTL COM 00215F107 7,342 -6,020 -45.05 237 -22.04 0.0003
2024-08-13 2024-06-30 13F ATN INTL COM 00215F107 13,362 13,362 305 0.0004
2024-05-07 2024-03-31 13F ATN INTL COM 00215F107 0 -52,453 -100.00 0 -100.00
2024-02-14 2023-12-31 13F ATN INTL COM 00215F107 52,453 1,922 3.80 2,044 28.23 0.0033
2023-11-14 2023-09-30 13F ATN INTL COM 00215F107 50,531 -2,448 -4.62 1,595 -17.79 0.0029
2023-08-11 2023-06-30 13F ATN INTL COM 00215F107 52,979 0 0.00 1,939 -10.52 0.0034
2023-05-12 2023-03-31 13F ATN INTL COM 00215F107 52,979 1,882 3.68 2,168 -6.39 0.0040
2023-02-10 2022-12-31 13F ATN INTL COM 00215F107 51,097 0 0.00 2,315 17.45 0.0051
2022-11-14 2022-09-30 13F ATN INTL COM 00215F107 51,097 0 0.00 1,971 -17.77 0.0044
2022-08-15 2022-06-30 13F ATN INTL COM 00215F107 51,097 1,961 3.99 2,397 22.30 0.0052
2022-05-13 2022-03-31 13F ATN INTL COM 00215F107 49,136 0 0.00 1,960 -0.15 0.0039
2022-02-14 2021-12-31 13F ATN INTL COM 00215F107 49,136 721 1.49 1,963 -13.45 0.0037
2021-11-12 2021-09-30 13F ATN INTL COM 00215F107 48,415 -8,015 -14.20 2,268 -11.65 0.0048
2021-08-06 2021-06-30 13F ATN INTL COM 00215F107 56,430 -343 -0.60 2,567 -7.96 0.0057
2021-05-12 2021-03-31 13F ATN INTL COM 00215F107 56,773 -5,248 -8.46 2,789 7.68 0.0070
2021-02-08 2020-12-31 13F ATN INTL COM 00215F107 62,021 401 0.65 2,590 -16.15 0.0067
2020-12-04 2020-09-30 13F/A-1 ATN INTL COM 00215F107 61,620 2,597 4.40 3,089 -13.59 0.0089
2020-11-06 2020-09-30 13F ATN INTL COM 00215F107 61,620 2,597 3,089 7,437.6252
2020-08-17 2020-06-30 13F/A-1 ATN INTL COM 00215F107 59,023 1,147 1.98 3,575 5.21 0.0111
2020-08-11 2020-06-30 13F ATN INTL COM 00215F107 55,397 -2,479 3,068 8,322.1133
2020-05-14 2020-03-31 13F ATN INTL COM 00215F107 57,876 2,479 4.47 3,398 10.76 0.0125
2020-02-06 2019-12-31 13F ATN INTL COM 00215F107 55,397 7,905 16.64 3,068 10.68 0.0092
2019-11-12 2019-09-30 13F ATN INTL COM 00215F107 47,492 7,677 19.28 2,772 20.57 0.0071
2019-08-14 2019-06-30 13F ATN INTL COM 00215F107 39,815 1,591 4.16 2,299 6.68 0.0075
2019-05-15 2019-03-31 13F ATN INTL COM 00215F107 38,224 8,116 26.96 2,155 -3.10 0.0072
2019-02-13 2018-12-31 13F ATN INTL COM 00215F107 30,108 0 0.00 2,224 0.00 0.0079
2018-11-08 2018-09-30 13F ATN INTL COM 00215F107 30,108 11,601 62.68 2,224 127.64 0.0081
2018-08-03 2018-06-30 13F ATN INTL COM 00215F107 18,507 13,709 285.72 977 241.61 0.0033
2018-05-11 2018-03-31 13F ATN INTL COM 00215F107 4,798 4,794 119,850.00 286 0.0011
2018-02-08 2017-12-31 13F ATN INTL COM 00215F107 4 4 0 0.0000
2016-08-11 2016-06-30 13F ATLANTIC TELE NETWORK COM NEW 049079205 0 -1,498 -100.00 0 -100.00
2016-05-10 2016-03-31 13F/A-1 ATLANTIC TELE NETWORK COM NEW 049079205 1,498 0 0.00 114 -2.56 0.0007
2016-02-03 2015-12-31 13F ATLANTIC TELE NETWORK COM NEW 049079205 1,498 1,498 0.00 117 0.0007
2015-08-04 2015-06-30 13F ATLANTIC TELE NETWORK COM NEW 049079205 0 -6,274 -100.00 0 -100.00
2015-05-14 2015-03-31 13F/A-1 ATLANTIC TELE NETWORK COM NEW 049079205 6,274 0 0.00 434 2.36 0.0038
2015-05-01 2015-03-31 13F ATLANTIC TELE NETWORK COM NEW 049079205 6,274 434
2015-02-10 2014-12-31 13F ATLANTIC TELE NETWORK COM NEW 049079205 6,274 6,274 424 0.0037
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.