Michael R Niggli Ess Tech, Inc. (GWH) insider trading activity

Michael R Niggli is Director of ESS Tech, Inc.. Currently has a direct ownership of 90,825 shares of GWH, which is worth approximately $392,364. The most recent transaction as insider was on Oct 13, 2025, when has been sold 13,513 shares (Common Stock) at a price of $0.0 per share, resulting in proceeds of $0. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 90.8K

17.48% 3M change

17.48% 12M change

Total Value Held $392,364

MICHAEL R NIGGLI Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Oct 13 2025	BUY Grant, award, or other acquisition	-	13,513 Added 12.95%	90,825 Common Stock
Aug 29 2024	BUY Exercise of conversion of derivative security	$81,541 $6.88 p/Share	11,852 Added 13.29%	77,312 Common Stock
May 17 2024	BUY Grant, award, or other acquisition	-	202,702 Added 17.56%	951,896 Common Stock
May 19 2023	BUY Grant, award, or other acquisition	-	135,373 Added 15.3%	749,194 Common Stock
May 16 2023	BUY Open market or private purchase	$8,100 $0.81 p/Share	10,000 Added 1.6%	613,821 Common Stock
May 12 2023	BUY Open market or private purchase	$22,599 $1.13 p/Share	20,000 Added 3.21%	603,821 Common Stock
Mar 06 2023	BUY Open market or private purchase	$8,250 $1.65 p/Share	5,000 Added 0.85%	583,821 Common Stock
Dec 15 2022	BUY Open market or private purchase	$48,896 $2.56 p/Share	19,100 Added 3.19%	578,821 Common Stock
Jun 01 2022	BUY Grant, award, or other acquisition	-	29,486 Added 5.0%	559,721 Common Stock
Mar 01 2022	BUY Open market or private purchase	$100,200 $5.01 p/Share	20,000 Added 3.63%	530,235 Common Stock
Nov 15 2021	BUY Grant, award, or other acquisition	-	30,053 Added 5.56%	510,219 Common Stock
Nov 09 2021	BUY Other acquisition or disposition	$657,520 $10.0 p/Share	65,752 Added 12.04%	480,166 Common Stock

Also insider at

PCG

PG&E Corp Utilities

Director

MRN

Michael R Niggli

Director

San Francisco, CA

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