Quick Takeaways
- Ronald J. Tanski has 2 issuer positions tracked on this page.
- Estimated disclosed ownership value: $29,913,565.
- Recent insider filing activity is available below.
Insider Trading & Ownership of Ronald J. Tanski
- Location
- Williamsville, NY
- Summary
- The estimated net worth of Ronald J. Tanski is at least $29,913,565 dollars as of 02 Apr 2026. Ronald J. Tanski is the Director of NATIONAL FUEL GAS CO and owns shares of NATIONAL FUEL GAS CO (NFG) stock worth about $28.62M. Ronald J. Tanski is the Director of CMS ENERGY CORP and owns shares of CMS ENERGY CORP (CMS) stock worth about $1.29M.
- Signature
- J. P. Baetzhold, Attorney in Fact
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow Ronald J. Tanski 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: NATIONAL FUEL GAS CO ($28,624,091).
- 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 Ronald J. Tanski
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| NFG | NATIONAL FUEL GAS CO | Director | $28,624,091 | 01 Apr 2026 | ||
| CMS, CMSA | CMS ENERGY CORP | Director | $1,289,474 | 02 May 2025 |
Insider Transactions Reported by Ronald J. Tanski:
| 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.