Howell Stephen Mitchell Jr. 内部人交易：近期 SEC Form 4 交易
过去 18 个月，Howell Stephen Mitchell Jr.（CIK 2025334）在 1 家公司共报告 10 笔 SEC Form 4 内部人交易（最近一笔 2026-08-14）。
| 日期 | 公司 | 身份 | 类型 | 股数 | 市值 |
|---|---|---|---|---|---|
| 2026-08-14 | Riot Platforms, Inc. (RIOT) | COO | 卖出 | 21,198 | $0 |
| 2026-08-04 | Riot Platforms, Inc. (RIOT) | COO | 卖出 | 153,162 | $3.1M |
| 2026-07-06 | Riot Platforms, Inc. (RIOT) | COO | 卖出 | 21,966 | $526,305 |
| 2026-01-05 | Riot Platforms, Inc. (RIOT) | COO | 卖出 | 29,482 | $373,537 |
| 2026-01-05 | Riot Platforms, Inc. (RIOT) | COO | 买入 | 197,316 | $0 |
| 2026-01-05 | Riot Platforms, Inc. (RIOT) | COO | 买入 | 394,632 | $0 |
| 2025-10-10 | Riot Platforms, Inc. (RIOT) | COO | 卖出 | 20,345 | $229,288 |
| 2025-07-03 | Riot Platforms, Inc. (RIOT) | COO | 卖出 | 20,345 | $229,288 |
| 2025-07-03 | Riot Platforms, Inc. (RIOT) | COO | 买入 | 221,827 | $0 |
| 2025-07-03 | Riot Platforms, Inc. (RIOT) | COO | 买入 | 443,656 | $0 |
来源：SEC Form 4 申报文件 · 截至 2026-08-14