Core & Main, Inc. (CNM)
Data as of , from SEC Form 4 filings.
No open-market insider trades (90d)Watch CNM
See up to 3 months of CNM. The 7-day demo opens the 1M and 3M ranges and puts CNM on your watchlist.
Start 7-day demoLatest CNM insider trades
About Core & Main, Inc. (CNM)
Core & Main, Inc. files with the SEC under CIK 0001856525 and is classified as durable goods, nec. We track it alongside the rest of the Industrials sector.
CNM Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Tax withholding / forfeiture | 2 | 1,543 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
CNM insider transactions (Form 4)
8149 Form 4 filings on record, the earliest from Oct 10, 2024, newest first. Filing history page 2 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Stephen O. Leclair - Officer | Tax withholding / forfeiture | Class A Common Stock | 1,519 footnote F1 | $49.96 | $76K | |
| Stephen O. Leclair - Officer | Tax withholding / forfeiture | Class A Common Stock | 3,081 footnote F1 | $49.38 | $152K | |
| ||||||
| Robyn L. Bradbury - Officer | Tax withholding / forfeiture | Class A Common Stock | 205 footnote F1 | $49.38 | $10K | |
| Robyn L. Bradbury - Officer | Tax withholding / forfeiture | Class A Common Stock | 270 footnote F1 | $49.96 | $13K | |
| ||||||
| Jeffrey D. Giles - Officer | Grant or award | Class A Common Stock | 4,377 footnote F1 | $0.00 | - | |
| Jeffrey D. Giles - Officer | Grant or award | Options (Rights to Buy) | 10,617 | $0.00 | - | |
| ||||||
| John Weldon Stephens - Officer | Option exercise | Class A Common Stock | 12,717 | $20.81 | $265K | |
| John Weldon Stephens - Officer | Option exercise | Options (Rights to Buy) | 12,717 | $0.00 | - | |
| Carla D. Harper - Officer | Grant or award | Class A Common Stock | 2,091 | $0.00 | - | |
| Mark R. Witkowski - Officer | Other | Class A Common Stock | 100,000 | $0.00 | - | |
| Mark R. Witkowski - Officer | Open-market sale | Class A Common Stock | 100,000 | $64.08 | $6.41M | |
| Mark R. Witkowski - Officer | Other | Class B Common Stock and Limited Partnership Interests | 100,000 | $0.00 | - | |
| Mark R. Witkowski - Officer | Other | Class B Common Stock and Limited Partnership Interests | 100,000 | $0.00 | - | |
| Mark R. Witkowski - Officer | Other | Class B Common Stock and Limited Partnership Interests | 100,000 | $0.00 | - | |
| Robyn L. Bradbury - Officer | Other | Class A Common Stock | 5,000 | $0.00 | - | |
| Robyn L. Bradbury - Officer | Open-market sale | Class A Common Stock | 5,000 | $64.51 | $323K | |
| Robyn L. Bradbury - Officer | Other | Class B Common Stock and Limited Partnership Interests | 5,000 | $0.00 | - | |
| Robyn L. Bradbury - Officer | Other | Class B Common Stock and Limited Partnership Interests | 5,000 | $0.00 | - | |
| Robyn L. Bradbury - Officer | Other | Class B Common Stock and Limited Partnership Interests | 5,000 | $0.00 | - | |
| Michael G. Huebert - Officer | Tax withholding / forfeiture | Class A Common Stock | 1,337 | $65.03 | $87K | |
| James G. Castellano - Director | Other | Class A Common Stock | 34,674 | $0.00 | - | |
| James G. Castellano - Director | Open-market sale | Class A Common Stock | 43,994 | $61.98 | $2.73M | |
| James G. Castellano - Director | Other | Class B Common Stock and Limited Partnership Interests | 34,674 | $0.00 | - | |
| James G. Castellano - Director | Other | Class B Common Stock and Limited Partnership Interests | 34,674 | $0.00 | - | |
| James G. Castellano - Director | Other | Class B Common Stock and Limited Partnership Interests | 34,674 | $0.00 | - | |
| Orvin T. Kimbrough - Director | Other | Class A Common Stock | 5 | $0.00 | - | |
| Orvin T. Kimbrough - Director | Other | Class A Common Stock | 5 | $0.00 | - | |
| Orvin T. Kimbrough - Director | Other | Class A Common Stock | 23,957 | $0.00 | - | |
| Orvin T. Kimbrough - Director | Open-market sale | Class A Common Stock | 23,962 | $61.77 | $1.48M | |
| Orvin T. Kimbrough - Director | Other | Class B Common Stock and Limited Partnership Interests | 23,957 | $0.00 | - | |
| Orvin T. Kimbrough - Director | Other | Class B Common Stock and Limited Partnership Interests | 23,957 | $0.00 | - | |
| Orvin T. Kimbrough - Director | Other | Class B Common Stock and Limited Partnership Interests | 23,957 | $0.00 | - | |
| Orvin T. Kimbrough - Director | Tax withholding / forfeiture | Class B Common Stock and Limited Partnership Interests | 1,038 | $0.00 | - | |
| Mark R. Witkowski - Officer | Other | Class A Common Stock | 100,000 | $0.00 | - | |
| Mark R. Witkowski - Officer | Open-market sale | Class A Common Stock | 72,331 | $61.12 | $4.42M | |
| Mark R. Witkowski - Officer | Open-market sale | Class A Common Stock | 27,669 | $61.63 | $1.71M | |
| Mark R. Witkowski - Officer | Other | Class B Common Stock and Limited Partnership Interests | 100,000 | $0.00 | - | |
| Mark R. Witkowski - Officer | Other | Class B Common Stock and Limited Partnership Interests | 100,000 | $0.00 | - | |
| Mark R. Witkowski - Officer | Other | Class B Common Stock and Limited Partnership Interests | 100,000 | $0.00 | - | |
| Stephen O. Leclair - Officer | Option exercise | Class A Common Stock | 80,028 | $20.81 | $1.67M | |
| Stephen O. Leclair - Officer | Open-market sale | Class A Common Stock | 80,028 | $62.27 | $4.98M | |
| Stephen O. Leclair - Officer | Option exercise | Class A Common Stock | 44,972 | $20.81 | $936K | |
| Stephen O. Leclair - Officer | Open-market sale | Class A Common Stock | 44,972 | $61.91 | $2.78M | |
| Stephen O. Leclair - Officer | Option exercise | Options (Rights to Buy) | 80,028 | $0.00 | - | |
| Stephen O. Leclair - Officer | Option exercise | Options (Rights to Buy) | 44,972 | $0.00 | - | |
| Robyn L. Bradbury - Officer | Other | Class A Common Stock | 43 | $0.00 | - | |
| Robyn L. Bradbury - Officer | Other | Class A Common Stock | 43 | $0.00 | - | |
| Robyn L. Bradbury - Officer | Other | Class A Common Stock | 24,957 | $0.00 | - | |
| Robyn L. Bradbury - Officer | Open-market sale | Class A Common Stock | 13,363 | $59.97 | $801K | |
| Robyn L. Bradbury - Officer | Open-market sale | Class A Common Stock | 11,318 | $61.08 | $691K | |
| Robyn L. Bradbury - Officer | Open-market sale | Class A Common Stock | 319 | $61.58 | $20K | |
| Robyn L. Bradbury - Officer | Other | Class B Common Stock and Limited Partnership Interests | 24,957 | $0.00 | - | |
| Robyn L. Bradbury - Officer | Other | Class B Common Stock and Limited Partnership Interests | 24,957 | $0.00 | - | |
| Robyn L. Bradbury - Officer | Other | Class B Common Stock and Limited Partnership Interests | 24,957 | $0.00 | - | |
 Kathleen M. Mazzarella - Director | Grant or award | Class A Common Stock | 2,189 | $0.00 | - | |
| Jeffrey D. Giles - Officer | Other | Class A Common Stock | 2 | $0.00 | - | |
| Jeffrey D. Giles - Officer | Other | Class A Common Stock | 2 | $0.00 | - | |
| Jeffrey D. Giles - Officer | Other | Class A Common Stock | 22,259 | $0.00 | - | |
| Jeffrey D. Giles - Officer | Open-market sale | Class A Common Stock | 25,000 | $54.71 | $1.37M | |
| Jeffrey D. Giles - Officer | Other | Class B Common Stock and Limited Partnership Interests | 22,259 | $0.00 | - | |
| Jeffrey D. Giles - Officer | Other | Class B Common Stock and Limited Partnership Interests | 22,259 | $0.00 | - | |
| Jeffrey D. Giles - Officer | Other | Class B Common Stock and Limited Partnership Interests | 22,259 | $0.00 | - | |
| Bradford A. Cowles - Officer | Other | Class A Common Stock | 50,000 | $0.00 | - | |
| Bradford A. Cowles - Officer | Open-market sale | Class A Common Stock | 50,000 | $55.07 | $2.75M | |
| Bradford A. Cowles - Officer | Other | Class B Common Stock and Limited Partnership Interests | 50,000 | $0.00 | - | |
| Bradford A. Cowles - Officer | Other | Class B Common Stock and Limited Partnership Interests | 50,000 | $0.00 | - | |
| Bradford A. Cowles - Officer | Other | Class B Common Stock and Limited Partnership Interests | 50,000 | $0.00 | - | |
| Stephen O. Leclair - Officer | Other | Class A Common Stock | 200,000 | $0.00 | - | |
| Stephen O. Leclair - Officer | Open-market sale | Class A Common Stock | 200,000 | $54.88 | $10.98M | |
| Stephen O. Leclair - Officer | Other | Class B Common Stock and Limited Partnership Interests | 200,000 | $0.00 | - | |
| Stephen O. Leclair - Officer | Other | Class B Common Stock and Limited Partnership Interests | 200,000 | $0.00 | - | |
| Stephen O. Leclair - Officer | Other | Class B Common Stock and Limited Partnership Interests | 200,000 | $0.00 | - | |
| Margaret Newman - Director | Other | Class A Common Stock | 32 | $0.00 | - | |
| Margaret Newman - Director | Other | Class A Common Stock | 32 | $0.00 | - | |
| Margaret Newman - Director | Other | Class A Common Stock | 14,968 | $0.00 | - | |
| Margaret Newman - Director | Open-market sale | Class A Common Stock | 15,000 | $55.25 | $829K | |
| Margaret Newman - Director | Other | Class B Common Stock and Limited Partnership Interests | 14,968 | $0.00 | - | |
| Margaret Newman - Director | Other | Class B Common Stock and Limited Partnership Interests | 14,968 | $0.00 | - | |
| Margaret Newman - Director | Other | Class B Common Stock and Limited Partnership Interests | 14,968 | $0.00 | - | |
| Jeffrey D. Giles - Officer | Gift | Class B Common Stock and Limited Partnership Interests | 232,928 | $0.00 | - | |
| Jeffrey D. Giles - Officer | Gift | Class B Common Stock and Limited Partnership Interests | 232,928 | $0.00 | - | |
Item 2.02, 9.01
Item 1.01, 9.01
Item 8.01, 9.01
Item 5.07, 9.01
Recent CNM Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| - | - | - | - | View on EDGAR | |
| - | - | - | - |
Stock trades in CNM disclosed by members of the U.S. House in the last 12 months, newest first. Values are the ranges as filed.
| Member | Type | Traded | Disclosed | Value range | Owner | Days to disclose | Filing |
|---|---|---|---|---|---|---|---|
 April McClain DelaneyDemocrat, MD-06 | Sale |
CNM insider trading FAQ
What is the latest insider trade for CNM?
Core & Main, Inc. (CNM) had 2 insider filings in the last 90 days, with the most recent on 2026-08-05. The full record for CNM runs to 49 Form 4 filings, the earliest from 2024-10-10. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying CNM stock?
No insider purchases of CNM were filed in the last 90 days. 2 purchases are on record for this company.
How many insiders are selling CNM stock?
No insider sales of CNM were filed in the last 90 days. 17 sales are on record for this company.
Where can I see CNM SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects CNM Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Industrials companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Carla D. Harper view on EDGAR
- - Michael G. Huebert view on EDGAR
- - James D. Hope view on EDGAR
- - James G. Castellano view on EDGAR
- - Margaret Newman view on EDGAR
- - M. Susan Hardwick view on EDGAR
- - Kathleen M. Mazzarella view on EDGAR
- - James D. Hope view on EDGAR
- - Bhavani Amirthalingam view on EDGAR
Related companies with recent insider activity
Learn more
- What the Form 4 transaction codes mean
- Grants, option exercises, gifts and tax withholding are not trades on the market. The codes say which is which.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Industrials
- Where CNM's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
Follow CNM with a 7-day demo
- CNM on your watchlist
- Every CNM Form 4 filing on record
- Up to 3 months of CNM price history
- The daily trading plan of ranked insider buys, on a delay, with the plan archive
Start 7-day demoCard required. Your card is never charged for the demo.
