Latest filing published 15 Oct 2025 for ESS Tech, Inc..
Filing timeline
BuySaleInsider track record
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Michael R. Niggli: trading record in brief
This profile gathers the share dealings of Michael R. Niggli across 2 companies, led by ESS Tech, Inc. and PG&E Corp. We count 23 filings; the first trade dates from 3 August 2020 and the latest from 13 October 2025.
Every open-market trade on record is a purchase: 5 purchases worth €171k, and no sale. A purchase on the market is a deliberate choice to commit personal money, which is why it draws more attention than a grant. Outside the open market, there are 10 share grants and 1 option exercise.
The median purchase comes to €21k. 2 out of 5 purchases came within 30 days of a purchase by at least one other insider of the same company. When several insiders buy within a few weeks of each other, analysts speak of a cluster purchase.
The record was last updated on 15 October 2025 with a share grant in ESS Tech, Inc. The last insider purchase was made public on 17 May 2023, 1,271 days ago. Between a trade and the moment it shows up on SEC (Form 4), the median delay is 3 days. US insiders must file a Form 4 within two business days of a trade. Every figure here comes from the filings published by SEC (Form 4) and describes the past, not future prices; it is not investment advice.
Companies and markets linked to Michael R. Niggli
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
- 13,513 shares0Common StockSEC:0001377160-25-000005:0
- 11,852 shares@ US$6.882.7% of flowCommon StockSEC:0001628280-24-039163:0
- 9,677 shares0Common StockSEC:0001004980-24-000066:0
- 202,702 shares0Common StockSEC:0001628280-24-023947:0
- 10,836 shares0Common StockSEC:0001004980-23-000102:0
- 135,373 shares0Common StockSEC:0001628280-23-019259:0
- 10,000 shares@ US$0.81040.3% of flowCommon StockSEC:0001628280-23-018718:0Canonical exit: 14 Aug 2023 (T+90)
- 20,000 shares@ US$1.12960.8% of flowCommon StockSEC:0001628280-23-018310:0Canonical exit: 10 Aug 2023 (T+90)
- 5,000 shares@ US$1.650.3% of flowCommon StockSEC:0001628280-23-006779:0Canonical exit: 4 Jun 2023 (T+90)
- 19,100 shares@ US$2.561.7% of flowCommon StockSEC:0001628280-22-032080:0Canonical exit: 15 Mar 2023 (T+90)
- 29,486 shares0Common StockSEC:0001628280-22-016181:0
- 11,532 shares0Common StockSEC:0001004980-22-000080:0
- 20,000 shares@ US$5.00843.5% of flowCommon StockSEC:0000899243-22-009227:0Canonical exit: 30 May 2022 (T+90)
- 77,822 shares@ US$10.0045.3% of flowCommon StockSEC:0000899243-21-045197:0
- 65,752 shares@ US$10.0038.2% of flowCommon StockSEC:0000899243-21-044447:0
- 13,461 shares0Common StockSEC:0001127602-21-017949:0
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