| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
Director
3 companies
Joseph P Platt Jr. is Director at GLRE and has filed Form 4s across 3 companies. Joseph P Platt Jr.'s net worth is not public. Form 4 filings only show shares in the companies where this person is an insider; those holdings are worth an estimated $6.5M at current prices.
Historically, Joseph P Platt Jr.'s trades have earned a middling insider score of 60/100 across 8 rated trades. Over a 12-month horizon, 50.0% of those trades were profitable, with an average 12-month return of -5.8%.
The biggest single holding is CNR (~$3.4M) as Director. The CNR filings lean toward selling, a net 24,404 shares.
Joseph P Platt Jr. has 32 Form 4 filings on record from May 2015 to August 2026, across 3 companies: Director at Greenlight Capital Re (GLRE), 2015–2026; Director at Core Natural Resources (CNR), 2017–2026; Director at CNX Resources (CNX), 2016–2017.
The 36 reported transactions were 24 stock awards, 8 open-market sales, 1 open-market purchase and 1 option or other derivative award, plus smaller numbers of other types.
Counted by filing, the open-market trades come to 1 purchase worth about $65K and 6 sales worth about $2.7M.
The only open-market purchase was 5,000 shares of GLRE at an average $12.97 on November 18, 2025, about $65K.
The largest open-market sale was 10,227 shares of CNR at an average $98.33 on September 15, 2023, about $1.0M. Twelve months later CNR was down 1%.
None of the 5 sales since April 2023 was marked as made under a Rule 10b5-1 trading plan.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| May 26, 2026 | GLRE Greenlight Capital Re, Ltd. | Director | Sell | 11,747 | $16.87 | $198,171.89 | -100% | -7.3% | - | |
| May 19, 2026 | GLRE Greenlight Capital Re, Ltd. | Director | Sell | 23,613 | $18.01 | $425,270.13 | -66.8% | -14.3% | - | |
| May 14, 2026 | GLRE Greenlight Capital Re, Ltd. | Director | Sell | 12,000 | $17.50 | $210,000.00 | -25.3% | -10.8% | - | |
| May 13, 2026 | GLRE Greenlight Capital Re, Ltd. | Director | Sell | 7,640 | $17.50 | $133,700.00 | -13.9% | -11.5% | - | |
| Nov 18, 2025 | GLRE Greenlight Capital Re, Ltd. | Director | Buy | 5,000 | $12.97 | $64,863.00 | New | +10.7% | - | |
| Sep 15, 2023 | CNR Core Natural Resources, Inc. | Director | Sell | 10,227 | $98.33 | $1,005,620.91 | -23.1% | -0.3% | -1.4% | |
| May 23, 2022 | CNR Core Natural Resources, Inc. | Director | Sell | 14,177 | $51.45 | $729,415.18 | -25.3% | +41.0% | +13.0% |