Joseph P JR Platt
CIK 1399967 · last filed 2026-08-07
"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.
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Disclosed Exposure
$7.19M
Companies
4
Total Filings
46
Lifetime Open-Market Net
-$3.09M
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 |
|---|---|---|---|---|---|---|---|
| GLRE | Director | 177,611 | $15.26 | $2.71M | -$1.35M | 28 | 2026-08-07 |
| CNR | Director | 40,660 | $101.24 | $4.12M | $0 | 3 | 2026-02-24 |
| Core Natural Resources, Inc. (CEIX) Delisted | Director | 35,690 | $99.61 | $3.56M | -$1.74M | 11 | 2024-05-09 |
| CNX | Director | 9,561 | $37.56 | $359.1K | $0 | 2 | 2017-05-11 |
Recent Filings · Page 3 of 5
46 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 |
|---|---|---|---|---|---|
| 2022-05-05 | Core Natural Resources, Inc. (CEIX) Delisted | Grant (A) | +3,062 | $0 | EDGAR |
| 2021-05-06 | Core Natural Resources, Inc. (CEIX) Delisted | Grant (A) | +14,177 | $0 | EDGAR |
| 2020-11-12 | GLRE | Grant (A) | +14,266 | $0 | EDGAR |
| 2020-05-12 | Core Natural Resources, Inc. (CEIX) Delisted | Grant (A) | +20,242 | $0 | EDGAR |
| 2019-05-13 | GLRE | Grant (A) | +16,860 | $0 | EDGAR |
| 2019-05-13 | Core Natural Resources, Inc. (CEIX) Delisted | Grant (A) | +4,815 | $0 | EDGAR |
| 2018-05-11 | Core Natural Resources, Inc. (CEIX) Delisted | Grant (A) | +3,491 | $0 | EDGAR |
| 2018-05-07 | GLRE | Grant (A) | +11,400 | $0 | EDGAR |
| 2017-12-14 | Core Natural Resources, Inc. (CEIX) Delisted | Grant (A) | +3,353 | $0 | EDGAR |
| 2017-12-14 | Core Natural Resources, Inc. (CEIX) Delisted | Grant (A) | +6,874 | $0 | 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.