Insider · CIK 0002011297
Joshua T. Mook
Files at HYLN (Hyliion Holdings Corp.). First filing -, latest -.
In brief
Joshua T. Mook files SEC Form 4 as officer at HYLN (Hyliion Holdings Corp.). No open-market trade is on file; the transactions below are grants, exercises and other rows that carry no view on the price.
A track record needs three past buys with six months of prices behind them; Joshua T. Mook has 0, so none is measured yet.
Signals
This insider’s open-market buys and sells, scored.
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Aug 21, 2026 | HYLN Hyliion Holdings Corp | 15,000 0.01% of outstanding | $50k | Aug 21, 2026 | none |
| May 19, 2026 | HYLN Hyliion Holdings Corp. | 15,000 0.01% of outstanding | $61k | May 19, 2026 | $30k |
| Dec 12, 2025 | HYLN Hyliion Holdings Corp | 32,000 0.02% of outstanding | $62k | Dec 12, 2025 | $15k |
| Nov 17, 2025 | HYLN Hyliion Holdings Corp | 9,039 0.01% of outstanding | $15k | Nov 17, 2025 | none |
Transactions
Every row this insider has filed, 32 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 30, 2026 | HYLN Hyliion Holdings Corp. | CConversion Common Stock | +55,981 | $0.00 | $0 | 1,152,587 | 12 d ago |
| Sep 30, 2026 | HYLN Hyliion Holdings Corp. | CConversion Common Stock | +71,341 | $0.00 | $0 | 1,223,928 | 12 d ago |
| Sep 30, 2026 | HYLN Hyliion Holdings Corp. | CConversion Performance Stock Incentive Unitsderivative | -55,981 | $0.00 | $0 | 223,924 | 12 d ago |
| Sep 30, 2026 | HYLN Hyliion Holdings Corp. | CConversion Performance Stock Incentive Unitsderivative | -71,341 | $0.00 | $0 | 214,025 | 12 d ago |
| Aug 21, 2026 | HYLN Hyliion Holdings Corp. | JOther Common Stock | -10,700 | $3.33 | $36k | 1,096,606 | Aug 21, 2026 |
| May 19, 2026 | HYLN Hyliion Holdings Corp. | JOther Common Stock | -4,800 | $4.06 | $19k | 1,109,309 | May 21, 2026 |
| May 20, 2026 | HYLN Hyliion Holdings Corp. | JOther Common Stock | -2,003 | $3.92 | $7,852 | 1,107,306 | May 21, 2026 |
| Mar 3, 2026 | HYLN Hyliion Holdings Corp. | JOther Common Stock | -14,816 | $2.04 | $30k | 1,114,109 | Mar 4, 2026 |
| Feb 11, 2026 | HYLN Hyliion Holdings Corp. | AGrant or award Common Stock | +95,122 | $2.05 | $195k | 1,128,925 | Feb 13, 2026 |
| Feb 11, 2026 | HYLN Hyliion Holdings Corp. | AGrant or award Performance Stock Incentive Unitsderivative | +285,366 | $0.00 | $0 | 285,366 | Feb 13, 2026 |
| Dec 12, 2025 | HYLN Hyliion Holdings Corp. | JOther Common Stock | -12,949 | $1.94 | $25k | 1,033,803 | Dec 15, 2025 |
| Nov 26, 2025 | HYLN Hyliion Holdings Corp. | AGrant or award Common Stock | +540,541 | $1.85 | $1.0M | 1,048,113 | Dec 1, 2025 |
| Nov 27, 2025 | HYLN Hyliion Holdings Corp. | FTax withholding Common Stock | -1,361 | $1.85 | $2,518 | 1,046,752 | Dec 1, 2025 |
| Nov 13, 2025 | HYLN Hyliion Holdings Corp. | FTax withholding Common Stock | -4,110 | $1.68 | $6,905 | 524,008 | Nov 17, 2025 |
| Aug 25, 2025 | HYLN Hyliion Holdings Corp. | FTax withholding Common Stock | -0 | $0.00 | $0 | 529,479 | Nov 17, 2025 |
| Nov 14, 2025 | HYLN Hyliion Holdings Corp. | FTax withholding Common Stock | -7,397 | $1.70 | $13k | 516,611 | Nov 17, 2025 |
| Nov 17, 2025 | HYLN Hyliion Holdings Corp. | JOther Common Stock | -9,039 | $1.66 | $15k | 507,572 | Nov 17, 2025 |
| Aug 27, 2025 | HYLN Hyliion Holdings Corp. | FTax withholding Common Stock | -1,361 | $1.69 | $2,300 | 519,688 | Aug 29, 2025 |
| Aug 25, 2025 | HYLN Hyliion Holdings Corp. | FTax withholding Common Stock | -8,430 | $1.77 | $15k | 521,049 | Aug 25, 2025 |
| May 27, 2025 | HYLN Hyliion Holdings Corp. | FTax withholding Common Stock | -1,361 | $1.14 | $1,552 | 529,479 | May 28, 2025 |
| May 13, 2025 | HYLN Hyliion Holdings Corp. | FTax withholding Common Stock | -4,110 | $1.91 | $7,850 | 530,840 | May 14, 2025 |
| Feb 27, 2025 | HYLN Hyliion Holdings Corp. | FTax withholding Common Stock | -1,361 | $1.61 | $2,191 | 534,950 | Feb 27, 2025 |
| Feb 18, 2025 | HYLN Hyliion Holdings Corp. | AGrant or award Common Stock | +93,302 | $0.00 | $0 | 536,311 | Feb 20, 2025 |
| Feb 18, 2025 | HYLN Hyliion Holdings Corp. | AGrant or award Performance Stock Incentive Unitsderivative | +279,905 | $0.00 | $0 | 279,905 | Feb 20, 2025 |
| Feb 13, 2025 | HYLN Hyliion Holdings Corp. | FTax withholding Common Stock | -19,646 | $2.14 | $42k | 443,009 | Feb 13, 2025 |
| Dec 11, 2024 | HYLN Hyliion Holdings Corp. | CConversion Common Stock | +101,250 | $0.00 | $0 | 462,655 | Dec 12, 2024 |
| Dec 11, 2024 | HYLN Hyliion Holdings Corp. | CConversion Performance Stock Incentive Unitsderivative | -101,250 | $0.00 | $0 | 0 | Dec 12, 2024 |
| Nov 14, 2024 | HYLN Hyliion Holdings Corp. | CConversion Common Stock | +60,750 | $0.00 | $0 | 361,405 | Nov 18, 2024 |
| Nov 14, 2024 | HYLN Hyliion Holdings Corp. | CConversion Performance Stock Incentive Unitsderivative | -60,750 | $0.00 | $0 | 101,250 | Nov 18, 2024 |
| Feb 27, 2024 | HYLN Hyliion Holdings Corp. | FTax withholding Common Stock | -6,623 | $1.57 | $10k | 262,877 | Feb 29, 2024 |
| Feb 13, 2024 | HYLN Hyliion Holdings Corp. | AGrant or award Common Stock | +202,500 | $0.00 | $0 | 269,500 | Feb 15, 2024 |
| Feb 13, 2024 | HYLN Hyliion Holdings Corp. | AGrant or award Performance Stock Incentive Unitsderivative | +202,500 | $0.00 | $0 | 202,500 | Feb 15, 2024 |
Questions about Joshua T. Mook
Answered from the filings on this page, as of the latest one.
Is Joshua T. Mook buying or selling?
Joshua T. Mook has no open-market buy or sell on SEC Form 4; the filings on record are grants, exercises and other transactions.
How did Joshua T. Mook's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Joshua T. Mook has 0.
Where does Joshua T. Mook file Form 4?
Joshua T. Mook has filed Form 4 at HYLN (Hyliion Holdings Corp.) as Chief Technology Officer. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.