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ATNI · ATN International, Inc. · Holdings

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$30.32 -0.33 (-1.08%) At close · Sep 11
Market Cap
$467.03M
Shares
15.40M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 133
Total Value: $251,885,183
Total Shares: 9,508,723
Showing 1–100 of 133 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 133 13F filers · Δ vs Mar 31, 2026
Top Holder
15.2%
Sep 2023 → Jun 2026 · range 11.7% – 17.6%
−0.7 pts
Top 5
45.5%
Sep 2023 → Jun 2026 · range 43.6% – 57.3%
−0.8 pts
Top 10
64.1%
Sep 2023 → Jun 2026 · range 64.1% – 77.2%
−1.6 pts
HHI
575
Sep 2023 → Jun 2026 · range 537 – 809
Broadly held−33

Quarterly Activity

vs Mar 31, 2026
New
19
Increased
54
Decreased
41
Sold Out
10
Unchanged
19
Holder count: +9
Institutional value: +1.0%
Shares held: +3.7%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 133
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 879585 CUSIP 00215F107 13F (30d) 43 filings 43 filers Visit website Investor relations