NIGGLI MICHAEL R

Chief Operating Officer at SAN DIEGO GAS & ELECTRIC CO · on record since Oct 10, 2006
Chief Operating Officer at SOUTHERN CALIFORNIA GAS CO · on record since Oct 10, 2006
Chief Operating Officer at PACIFIC ENTERPRISES INC · on record since Oct 10, 2006
Director at ESS Tech, Inc. · on record since Oct 18, 2021
Director at PG&E Corp · on record since Jul 10, 2020

Insider trading activity of NIGGLI MICHAEL R

Transactions on record: 22; since Aug 5, 2020

Open-market buys: 5; $188K

Open-market sells: 0

Companies traded: 2; last filing Oct 15, 2025

Figures computed from official regulatory filings — .

Companies where NIGGLI MICHAEL R has traded

ESS Tech, Inc.17 tx · $1.7M · Oct 15, 2025
PG&E Corp5 tx · May 21, 2024

Track record of NIGGLI MICHAEL R

Statistical track record

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Open-market buys: 5

Last buy: May 16, 2023

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Transaction history of NIGGLI MICHAEL R

Co-insiders of NIGGLI MICHAEL R

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
ESS Tech, Inc.Listing on record	Oct 15, 2025	Award	13,513	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ESS Tech, Inc.Listing on record	Sep 3, 2024	ExerciseD (derivative)	-11,852	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ESS Tech, Inc.Listing on record	Sep 3, 2024	Exercise	11,852	6.88 USD	$81.5K		SEC
PG&E CorpListing on record	May 21, 2024	Award	9,677	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ESS Tech, Inc.Listing on record	May 17, 2024	Award	202,702	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
PG&E CorpListing on record	May 23, 2023	Award	10,836	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ESS Tech, Inc.Listing on record	May 22, 2023	Award	135,373	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ESS Tech, Inc.Listing on record	May 17, 2023	Buy	10,000	0.81 USD	$8.1K	conv 43Cluster	SEC
ESS Tech, Inc.Listing on record	May 15, 2023	Buy	20,000	1.13 USD	$22.6K	conv 36	SEC
ESS Tech, Inc.Listing on record	Mar 7, 2023	Buy	5,000	1.65 USD	$8.3K	conv 36	SEC
ESS Tech, Inc.Listing on record	Dec 16, 2022	Buy	19,100	2.56 USD	$48.9K	conv 43	SEC
ESS Tech, Inc.Listing on record	Jun 3, 2022	Award	29,486	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
PG&E CorpListing on record	May 23, 2022	Award	11,532	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ESS Tech, Inc.Listing on record	Mar 3, 2022	Buy	20,000	5.01 USD	$100.2K	conv 49First in 12mo	SEC
ESS Tech, Inc.Listing on record	Nov 12, 2021	Other	31,140	10.00 USD	$311.4K		SEC
ESS Tech, Inc.Listing on record	Nov 12, 2021	Other	11,670	10.00 USD	$116.7K		SEC
ESS Tech, Inc.Listing on record	Nov 12, 2021	Other	11,670	10.00 USD	$116.7K		SEC
ESS Tech, Inc.Listing on record	Nov 12, 2021	Other	65,752	10.00 USD	$657.5K		SEC
ESS Tech, Inc.Listing on record	Nov 12, 2021	Other	11,670	10.00 USD	$116.7K		SEC
ESS Tech, Inc.Listing on record	Nov 12, 2021	Other	11,670	10.00 USD	$116.7K		SEC
PG&E CorpListing on record	May 24, 2021	Award	13,461	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
PG&E CorpListing on record	Aug 5, 2020	Award	12,820	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
ESS Tech, Inc.Listing on record	Oct 15, 2025	Award	13,513	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ESS Tech, Inc.Listing on record	Sep 3, 2024	ExerciseD (derivative)	-11,852	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ESS Tech, Inc.Listing on record	Sep 3, 2024	Exercise	11,852	6.88 USD	$81.5K		SEC
PG&E CorpListing on record	May 21, 2024	Award	9,677	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ESS Tech, Inc.Listing on record	May 17, 2024	Award	202,702	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
PG&E CorpListing on record	May 23, 2023	Award	10,836	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ESS Tech, Inc.Listing on record	May 22, 2023	Award	135,373	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ESS Tech, Inc.Listing on record	May 17, 2023	Buy	10,000	0.81 USD	$8.1K	conv 43Cluster	SEC
ESS Tech, Inc.Listing on record	May 15, 2023	Buy	20,000	1.13 USD	$22.6K	conv 36	SEC
ESS Tech, Inc.Listing on record	Mar 7, 2023	Buy	5,000	1.65 USD	$8.3K	conv 36	SEC
ESS Tech, Inc.Listing on record	Dec 16, 2022	Buy	19,100	2.56 USD	$48.9K	conv 43	SEC
ESS Tech, Inc.Listing on record	Jun 3, 2022	Award	29,486	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
PG&E CorpListing on record	May 23, 2022	Award	11,532	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ESS Tech, Inc.Listing on record	Mar 3, 2022	Buy	20,000	5.01 USD	$100.2K	conv 49First in 12mo	SEC
ESS Tech, Inc.Listing on record	Nov 12, 2021	Other	31,140	10.00 USD	$311.4K		SEC
ESS Tech, Inc.Listing on record	Nov 12, 2021	Other	11,670	10.00 USD	$116.7K		SEC
ESS Tech, Inc.Listing on record	Nov 12, 2021	Other	11,670	10.00 USD	$116.7K		SEC
ESS Tech, Inc.Listing on record	Nov 12, 2021	Other	65,752	10.00 USD	$657.5K		SEC
ESS Tech, Inc.Listing on record	Nov 12, 2021	Other	11,670	10.00 USD	$116.7K		SEC
ESS Tech, Inc.Listing on record	Nov 12, 2021	Other	11,670	10.00 USD	$116.7K		SEC
PG&E CorpListing on record	May 24, 2021	Award	13,461	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
PG&E CorpListing on record	Aug 5, 2020	Award	12,820	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC