MOOK JOSHUA T. (CIK 2011297) reported 18 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-21). Recent activity: Sell HYLN (4,800 shares), Sell HYLN (2,003 shares), Sell HYLN (14,816 shares), Buy HYLN (95,122 shares), Sell HYLN (12,949 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-21 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 4,800 | $19,488 |
| 2026-05-21 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 2,003 | $7,852 |
| 2026-03-04 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 14,816 | $30,225 |
| 2026-02-13 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Buy | 95,122 | $195,000 |
| 2025-12-15 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 12,949 | $25,121 |
| 2025-12-01 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Buy | 540,541 | $1.0M |
| 2025-12-01 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 1,361 | $2,518 |
| 2025-11-17 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 0 | $0 |
| 2025-11-17 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 4,110 | $6,905 |
| 2025-11-17 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 7,397 | $12,575 |
| 2025-11-17 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 9,039 | $15,005 |
| 2025-08-29 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 1,361 | $2,300 |
| 2025-08-25 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 8,430 | $14,921 |
| 2025-05-28 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 1,361 | $1,552 |
| 2025-05-14 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 4,110 | $7,850 |
| 2025-02-27 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 1,361 | $2,191 |
| 2025-02-20 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Buy | 93,302 | $0 |
| 2025-02-13 | Hyliion Holdings Corp. (HYLN) | Chief Technology Officer | Sell | 19,646 | $42,042 |
Source: SEC Form 4 filings · as of 2026-05-21