YOUNG CHARLES EDWIN 内部人交易：近期 SEC Form 4 交易
过去 18 个月，YOUNG CHARLES EDWIN（CIK 1687132）在 1 家公司共报告 14 笔 SEC Form 4 内部人交易（最近一笔 2026-08-20）。
| 日期 | 公司 | 身份 | 类型 | 股数 | 市值 |
|---|---|---|---|---|---|
| 2026-08-20 | Smart Sand, Inc. (SND) | CEO | 买入 | 110,063 | $0 |
| 2026-06-09 | Smart Sand, Inc. (SND) | CEO | 卖出 | 5,811 | $31,670 |
| 2026-03-19 | Smart Sand, Inc. (SND) | CEO | 卖出 | 5,811 | $23,709 |
| 2026-03-03 | Smart Sand, Inc. (SND) | CEO | 买入 | 48,788 | $0 |
| 2026-03-03 | Smart Sand, Inc. (SND) | CEO | 买入 | 57,420 | $0 |
| 2026-03-03 | Smart Sand, Inc. (SND) | CEO | 卖出 | 25,862 | $134,224 |
| 2026-03-03 | Smart Sand, Inc. (SND) | CEO | 卖出 | 13,896 | $72,120 |
| 2026-02-24 | Smart Sand, Inc. (SND) | CEO | 卖出 | 17,423 | $91,471 |
| 2025-09-05 | Smart Sand, Inc. (SND) | CEO | 买入 | 10,630 | $20,091 |
| 2025-09-05 | Smart Sand, Inc. (SND) | CEO | 买入 | 8,401 | $16,130 |
| 2025-09-05 | Smart Sand, Inc. (SND) | CEO | 买入 | 20,000 | $38,200 |
| 2025-08-19 | Smart Sand, Inc. (SND) | CEO | 买入 | 29,592 | $56,817 |
| 2025-08-19 | Smart Sand, Inc. (SND) | CEO | 买入 | 11,498 | $21,501 |
| 2025-08-19 | Smart Sand, Inc. (SND) | CEO | 买入 | 8,910 | $17,464 |
来源：SEC Form 4 申报文件 · 截至 2026-08-20