Quick Takeaways
- Mark R. Witkowski has 1 issuer position tracked on this page.
- Estimated disclosed ownership value: $2,990,461.
- Recent insider filing activity is available below.
- Info
- Insider Ownership
Insider Trading & Ownership of Mark R. Witkowski
- Location
- St. Louis, MO
- Summary
- The estimated net worth of Mark R. Witkowski is at least $2,990,461 dollars as of 13 Mar 2026. Mark R. Witkowski is the Chief Executive Officer, Director of Core & Main, Inc. and owns shares of Core & Main, Inc. (CNM) stock worth about $2.99M.
- Signature
- /s/ Mark Whittenburg, as Attorney-in-Fact for Mark R. Witkowski
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow Mark R. Witkowski 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: Core & Main, Inc. ($2,990,461).
- Past-year value change for that position: -$12,534,598.
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 Mark R. Witkowski
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| CNM | Core & Main, Inc. | Chief Executive Officer, Director | $2,990,461 | -$12,534,598 | -81% | 11 Mar 2026 |
Insider Transactions Reported by Mark R. Witkowski:
| 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.