Insiders / Platt Joseph P JR
Platt Joseph P JR
CIK 1399967personinsider
Companies
2
First seen
Feb 19, 2026
Last activity
May 27, 2026
Companies
| Company | Shares held | Latest |
|---|---|---|
| Core Natural Resources, Inc. · CNR | 40,648 | — |
| Greenlight Capital Re Ltd · GLRE | — | — |
All securities held
1 position · latest reported per filing
| Company | Security | Shares |
|---|---|---|
| Core Natural Resources, Inc. | Common stock, par value $0.01 per share | 40,648 |
Activity
InsidersInstitutions
This person's insider trades (Form 4), across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| May 19, 2026 | Sell | GLRE Greenlight Capital Re Ltd ORDINARY SHARES | $425.3K | -24K -66.78% | 11,747 0.04% of shares | medium |
| May 14, 2026 | Sell | GLRE Greenlight Capital Re Ltd ORDINARY SHARES | $210.0K | -12K -25.34% | 35,360 0.11% of shares | medium |
| May 26, 2026 | Sell | GLRE Greenlight Capital Re Ltd ORDINARY SHARES | $198.2K | -12K -100.00% | 0 0.00% of shares | medium |
| May 12, 2026 | Sell | GLRE Greenlight Capital Re Ltd ORDINARY SHARES | $119.3K | -7K -12.40% | 48,180 0.15% of shares | medium |
| May 13, 2026 | Sell | GLRE Greenlight Capital Re Ltd ORDINARY SHARES | $14.3K | -820 -1.70% | 47,360 0.15% of shares | low |
| Feb 17, 2026 | Grant | CNR Core Natural Resources, Inc. Common stock, par value $0.01 per share | $0 | +2K +4.12% | 40,648 0.08% of shares | low |