MICHAEL T PRIOR
CIK 1244465 · CHAIRMAN AND CEO · last filed 2026-03-27
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Loading insider history…
Disclosed Exposure
$14.81M
Companies
1
Total Filings
121
Lifetime Open-Market Net
-$4.61M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ATNI | Director | 589,254 | $25.13 | $14.81M | -$4.61M | 121 | 2026-03-27 |
Recent Filings · Page 4 of 13
121 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2021-03-15 | ATNI | Tax (F) | −3,021 | -$157.4K | EDGAR |
| 2021-03-11 | ATNI | Grant (A) | +19,350 | $0 | EDGAR |
| 2021-03-10 | ATNI | Tax (F) | −2,428 | -$126.9K | EDGAR |
| 2021-03-09 | ATNI | Tax (F) | −2,409 | -$120.2K | EDGAR |
| 2020-08-13 | ATNI | Sell (S) | −2,000 | -$120.3K | EDGAR |
| 2020-08-03 | ATNI | Sell (S) | −300 | -$19.2K | EDGAR |
| 2020-07-17 | ATNI | Sell (S) | −2,000 | -$125.0K | EDGAR |
| 2020-06-02 | ATNI | Sell (S) | −2,000 | -$120.9K | EDGAR |
| 2020-05-01 | ATNI | Sell (S) | −2,400 | -$183.9K | EDGAR |
| 2020-04-27 | ATNI | Sell (S) | −3,307 | -$230.6K | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.