Quick Takeaways
- Michael R. Niggli has 2 issuer positions tracked on this page.
- Estimated disclosed ownership value: $1,147,822.
- Recent insider filing activity is available below.
Insider Trading & Ownership of Michael R. Niggli
- Location
- San Diego, CA
- Summary
- The estimated net worth of Michael R. Niggli is at least $1,147,822 dollars as of 15 Oct 2025. Michael R. Niggli is the Director of PG&E Corp and owns shares of PG&E Corp (PCG) stock worth about $1.03M. Michael R. Niggli is the Director of ESS Tech, Inc. and owns shares of ESS Tech, Inc. (GWH) stock worth about $116.3K.
- Signature
- /s/ Kate Suhadolnik, by power of attorney
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow Michael R. Niggli and return when a new Insider Trading filing changes the record on this page.
This uses the existing product follow flow to surface future filing-backed changes without guessing what they mean.
What Changed
- Largest disclosed position: PG&E Corp ($1,031,566).
- Past-year value change for that position: .
Why This Matters
- This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
- You can cross-check role, issuer, and filing chronology directly against the SEC source.
Source Evidence
Filed on Form 4
See Original Filing
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
Ownership of Michael R. Niggli
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| PCG, PCG-PA | PG&E Corp | Director | $1,031,566 | 17 May 2024 | ||
| GWH, GWH-WT | ESS Tech, Inc. | Director | $116,256 | 13 Oct 2025 |
Insider Transactions Reported by Michael R. Niggli:
| Sym | Company | Class | Transaction | % | Value $ | * Price $ | Shares | Shares After | Date | Ownership |
|---|
* An asterisk sign (*) next to the price indicates that the price is likely invalid.