Platt Joseph P JR insider trades
Platt Joseph P JR has filed 17 Form 4s with the SEC that we hold, for Greenlight Capital Re, LTD. (GLRE) (Director) and Core Natural Resources, Inc. (CNR) (Director). Across all of them we count 1 purchase worth $64.8K and 8 sales worth $2.7M reported on Form 4. In the last 12 months: 1 purchase ($64.8K) and 5 sales ($967.1K). The largest single trade was a sale of 10,227 shares of Core Natural Resources, Inc. worth $1.0M, dated 2023-09-15. The first filing on our record is dated 2022-05-05 and the latest 2026-08-07.
Greenlight Capital Re, LTD. (GLRE)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2025-11-18 | P, purchase reported on Form 4 | 5,000 | $64.8K | 2025-11-19 |
| 2026-05-12 | S, sale reported on Form 4 | 6,820 | $119.3K | 2026-05-14 |
| 2026-05-13 | S, sale reported on Form 4 | 820 | $14.3K | 2026-05-14 |
| 2026-05-14 | S, sale reported on Form 4 | 12,000 | $210.0K | 2026-05-18 |
| 2026-05-19 | S, sale reported on Form 4 | 23,613 | $425.3K | 2026-05-20 |
| 2026-05-26 | S, sale reported on Form 4 | 11,747 | $198.2K | 2026-05-27 |
Core Natural Resources, Inc. (CNR)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2022-05-23 | S, sale reported on Form 4 | 11,377 | $584.1K | 2022-05-25 |
| 2022-05-23 | S, sale reported on Form 4 | 2,800 | $145.3K | 2022-05-25 |
| 2023-09-15 | S, sale reported on Form 4 | 10,227 | $1.0M | 2023-09-19 |
Counted from the Form 4 filings this reporting owner (SEC CIK 1399967) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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