Joshua T. Mook Hyliion Holdings Corp. (HYLN) insider trading activity

Joshua T. Mook is Chief Technology Officer of Hyliion Holdings Corp.. Currently has a direct ownership of 519,688 shares of HYLN, which is worth approximately $1.2 Million. The most recent transaction as insider was on Aug 27, 2025, when has been sold 1,361 shares (Common Stock) at a price of $1.69 per share, resulting in proceeds of $2,300. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 520K

1.85% 3M change

72.85% 12M change

Total Value Held $1.2 Million

JOSHUA T. MOOK Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Aug 27 2025	SELL Payment of exercise price or tax liability	$2,300 $1.69 p/Share	1,361 Reduced 0.26%	519,688 Common Stock
Aug 25 2025	SELL Payment of exercise price or tax liability	$14,921 $1.77 p/Share	8,430 Reduced 1.59%	521,049 Common Stock
May 27 2025	SELL Payment of exercise price or tax liability	$1,551 $1.14 p/Share	1,361 Reduced 0.26%	529,479 Common Stock
May 13 2025	SELL Payment of exercise price or tax liability	$7,850 $1.91 p/Share	4,110 Reduced 0.77%	530,840 Common Stock
Feb 27 2025	SELL Payment of exercise price or tax liability	$2,191 $1.61 p/Share	1,361 Reduced 0.25%	534,950 Common Stock
Feb 18 2025	BUY Grant, award, or other acquisition	-	93,302 Added 14.82%	536,311 Common Stock
Feb 13 2025	SELL Payment of exercise price or tax liability	$42,042 $2.14 p/Share	19,646 Reduced 4.25%	443,009 Common Stock
Dec 11 2024	BUY Conversion of derivative security	-	101,250 Added 17.96%	462,655 Common Stock
Nov 14 2024	BUY Conversion of derivative security	-	60,750 Added 14.39%	361,405 Common Stock
Aug 27 2024	SELL Payment of exercise price or tax liability	$2,640 $1.94 p/Share	1,361 Reduced 0.45%	300,655 Common Stock
Aug 13 2024	BUY Conversion of derivative security	-	40,500 Added 11.82%	302,016 Common Stock
May 27 2024	SELL Payment of exercise price or tax liability	$2,055 $1.51 p/Share	1,361 Reduced 0.52%	261,516 Common Stock
Feb 27 2024	SELL Payment of exercise price or tax liability	$10,398 $1.57 p/Share	6,623 Reduced 2.46%	262,877 Common Stock
Feb 13 2024	BUY Grant, award, or other acquisition	-	202,500 Added 42.9%	269,500 Common Stock

JTM

Joshua T. Mook

Chief Technology Officer

Cedar Park, TX

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