| 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
1 company
William N. Mathis last filed a Form 4 in October 2025, as Director at BSM. William N. Mathis's net worth is not public. Form 4 filings only show shares in the companies where this person was an insider, as of the last filing.
At the last filing, the largest reported position was 246,200 shares of BSM. Net of sales, the BSM filings show accumulation of 26,787 shares.
William N. Mathis has 56 Form 4 filings on record from May 2015 to October 2025, all as Director at Black Stone Minerals (BSM), 2015–2025.
The 84 reported transactions were 50 stock awards, 16 other transactions, 7 conversions and 5 inheritances, plus smaller numbers of other types.
Counted by filing, the open-market trades come to 3 purchases worth about $402K and 1 sale worth about $32.
The largest open-market purchase was 11,400 shares of BSM at an average $16.79 on November 13, 2018, about $191K.
The only open-market sale was 2 shares of BSM at an average $15.85 on June 14, 2019, about $32.
Shares as reported in the last Form 4 for each company; the most recent is from October 2025. Values use today's prices. Any trades after the last filing were not reported, so current holdings may differ.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|
| Jun 14, 2019 | BSM Black Stone Minerals, L.P. | Director | Sell | 2 | $15.85 | $31.70 | - | |
| Nov 13, 2018 | BSM Black Stone Minerals, L.P. | Director | Buy | 11,400 | $16.79 | $191,389.54 | +1.9% | |
| Mar 14, 2016 | BSM Black Stone Minerals, L.P. | Director | Buy | 11,410 | $13.71 | $156,437.95 | +1.9% | |
| Mar 10, 2016 | BSM Black Stone Minerals, L.P. | Director | Buy | 3,979 | $13.50 | $53,697.00 | +0.7% |