ATN International ATNI Insider Ownership

NASDAQ ATNI
$29.92 -0.18 (-0.60%)
As of: Sep 9, 2026 · 3:59 PM EDT

Insider Holdings by Owner

1.20Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
34.74%
-0.464% pp QoQ
Shares Held by Insiders
5.30Mn
filed for Sep 2026
-1.32% QoQ
Shares Outstanding
15.27Mn
15,267,000 shares
Direct Holdings
5.15Mn
Indirect: 151.71K
Net Shares Traded (QoQ)
-70.90K
net selling in Sep 2026
Insiders Holding Shares
16
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest
Average ownership
Peak ownership

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter
Net over range
Buying quarters

Insider Ownership Summary

Quarter ending 30 Sep, 2026

ATN International's top three insider shareholders as of September 09, 2026 are Cornelius B Jr Prior (Chairman, 3.98Mn shares), Michael T Prior (Chairman And Ceo, 587.67K shares), Michael T Prior (Chairman And Ceo, 587.67K shares).

Form 4 Holdings

Insiders Holding ATNI

Insiders 16
Shares held 1.20Mn
Of outstanding 7.86%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Michael T Prior Chairman And Ceo 587,673 0 587,673 49.0% 27 Mar, 2026
2 Brad W Martin Chief Executive Officer 126,129 0 126,129 10.5% 27 Mar, 2026
3 Justin D Benincasa Cfo 68,135 0 68,135 5.7% 27 Mar, 2024
4 Mary Mabey Svp And General Counsel 60,402 0 60,402 5.0% 11 Aug, 2026
5 Carlos Doglioli Chief Financial Officer 50,449 0 50,449 4.2% 19 Mar, 2026
6 Justin M Leon Svp, Corporate Development 49,707 0 49,707 4.1% 27 Mar, 2026
7 Pamela F Lenehan Director 38,086 0 38,086 3.2% 17 Jun, 2026
8 Bernard J Bulkin Director 37,217 0 37,217 3.1% 18 Jun, 2026
9 Naji Khoury Ceo 36,853 0 36,853 3.1% 28 Apr, 2026
10 Cornelius B Jr Prior TenPercentOwner 0 30,041 30,041 2.5% 04 Sep, 2026
11 April Henry Director 26,338 0 26,338 2.2% 18 Jun, 2026
12 Richard J Ganong Director 23,787 0 23,787 2.0% 20 Jun, 2024
13 Liane J Pelletier Director 20,816 0 20,816 1.7% 08 Jun, 2022
14 Patricia Jacobs Director 19,958 0 19,958 1.7% 02 Sep, 2026
15 Derek Hudson Director 15,721 0 15,721 1.3% 17 Jun, 2026
16 James S Eisenstein Director 8,982 0 8,982 0.7% 07 Jun, 2022

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

4,273 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
02 Sep, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 2,582 $31.12 $80.35K 34,583 Indirect
03 Sep, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 4,542 $31.02 $140.88K 30,041 Indirect
24 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 10,000 $31.34 $313.39K 37,165 Indirect
20 Aug, 2026 Patricia Jacobs Director Disposed S 1,000 $31.14 $31.14K 21,458 Direct
19 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 10,000 $31.86 $318.62K 47,665 Indirect
20 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 500 $31.25 $15.63K 47,165 Indirect
17 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 5,745 $31.79 $182.65K 58,665 Indirect
18 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 1,000 $31.75 $31.75K 57,665 Indirect
13 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 2,500 $32.05 $80.13K 64,436 Indirect
14 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 26 $32.10 $835 64,410 Indirect
10 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed G 12,000 $0.00 $0 3,982,303 Direct
10 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 6,500 $32.49 $211.21K 67,436 Indirect
10 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 500 $33.25 $16.63K 66,936 Indirect
10 Aug, 2026 Mary Mabey Svp And General Counsel Disposed S 5,000 $32.13 $160.63K 60,402 Direct
06 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 500 $28.76 $14.38K 80,936 Indirect
06 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 500 $30.50 $15.25K 80,436 Indirect
06 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 500 $28.80 $14.40K 79,936 Indirect
06 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 500 $30.30 $15.15K 79,436 Indirect
06 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 500 $30.30 $15.15K 78,936 Indirect
06 Aug, 2026 Cornelius B Jr Prior TenPercentOwner Disposed S 500 $28.96 $14.48K 78,436 Indirect