Company / CIK 0001856525
Core & Main, Inc.
- Ticker
- CNM
- Size, estimated from filings
- Large cap ($10B – $200B)
- Insiders on file
- 18
- Members of Congress who traded it
- 2
- Federal contracts on record
- none matched
- Lobbying filings on record
- none matched
- SEC filings
- EDGAR ↗
- Latest trade on record
- October 16, 2026
Core & Main, Inc. (CNM) has 18 insiders on file who disclosed 61 transactions in the last 12 months (2 open-market buys, 27 sales, about $1.2M at reported prices), and 6 congressional trades in its stock are on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name; no lobbying filing names it as client this year.
Core & Main, Inc. in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
8 people account for the disclosed buying and selling in Core & Main, Inc. over the last 12 months; the most active is Bradbury Robyn L with $306K.
Insiders
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| Witkowski Mark R | Chief Executive Officer | 6 | 0 | 3 | October 20, 2026 |
| LeClair Stephen O | Director | 2 | 0 | 2 | August 5, 2026 |
| Harper Carla D | Senior VP, Human Resources | 7 | 0 | 5 | August 5, 2026 |
| HUEBERT MICHAEL G. | President | 5 | 0 | 3 | July 23, 2026 |
| Hope James D | Director | 3 | 2 | 0 | July 8, 2026 |
| Hardwick M Susan | Director | 2 | 0 | 0 | June 24, 2026 |
| Buck Robert M | Director | 1 | 0 | 0 | June 24, 2026 |
| Kimbrough Orvin T | Director | 1 | 0 | 0 | June 24, 2026 |
| Gipson Dennis G | Director | 1 | 0 | 0 | June 24, 2026 |
| Amirthalingam Bhavani | Director | 1 | 0 | 0 | June 24, 2026 |
| MAZZARELLA KATHLEEN M | Director | 1 | 0 | 0 | June 24, 2026 |
| NEWMAN MARGARET | Director | 1 | 0 | 0 | June 24, 2026 |
| Castellano James G | Director | 1 | 0 | 0 | June 24, 2026 |
| Bradbury Robyn L | Chief Financial Officer | 11 | 0 | 5 | April 21, 2026 |
| Whittenburg Mark G | General Counsel and Secretary | 4 | 0 | 3 | March 13, 2026 |
| Giles Jeffrey D | EVP, Corporate Development | 4 | 0 | 0 | March 13, 2026 |
| Cowles Bradford A | President | 5 | 0 | 3 | March 13, 2026 |
| Stephens John Weldon | Chief Accounting Officer | 5 | 0 | 3 | March 13, 2026 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded CNM
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the CNM page.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| Lisa C. McClain | Representative (MI, District 9), Republican | 4 | 2 | 2 | $4,004–$60K | October 31, 2025 |
| April McClain Delaney | Representative (MD, District 6), Democrat | 2 | 0 | 2 | $101K–$265K | August 25, 2026 |
Insider transactions
| Filer | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Witkowski Mark R | CNM | Other G | October 16, 2026 | October 20, 2026 | 4d | 19,596 | — | — | Form 4 ↗ | ||
| Harper Carla D | CNM | Sell F | August 4, 2026 | August 5, 2026 | 1d | 242 | $46 | $11K | Form 4 ↗ | ||
| HUEBERT MICHAEL G. | CNM | Sell F | July 22, 2026 | July 23, 2026 | 1d | 1,301 | $44 | $57K | Form 4 ↗ | ||
| Hope James D | CNM | Buy P | July 6, 2026 | July 8, 2026 | 2d | 2,067 | $46 | $95K | Form 4 ↗ | ||
| Castellano James G | CNM | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| NEWMAN MARGARET | CNM | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Hardwick M Susan | CNM | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| MAZZARELLA KATHLEEN M | CNM | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Hope James D | CNM | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Amirthalingam Bhavani | CNM | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Gipson Dennis G | CNM | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Kimbrough Orvin T | CNM | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Buck Robert M | CNM | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Harper Carla D | CNM | Sell F | June 22, 2026 | June 24, 2026 | 2d | 568 | $47 | $27K | Form 4 ↗ | ||
| Bradbury Robyn L | CNM | Exchange C | April 17, 2026 | April 21, 2026 | 4d | 5,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Bradbury Robyn L | CNM | Other J | April 17, 2026 | April 21, 2026 | 4d | 5,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Bradbury Robyn L | CNM | Other J | April 17, 2026 | April 21, 2026 | 4d | 5,000 | — | — | 10b5-1 planindirectderivative | Form 4 ↗ | |
| Bradbury Robyn L | CNM | Sell S | April 17, 2026 | April 21, 2026 | 4d | 3,353 | $53 | $177K | 10b5-1 plan | Form 4 ↗ | |
| Bradbury Robyn L | CNM | Sell S | April 17, 2026 | April 21, 2026 | 4d | 1,647 | $52 | $86K | 10b5-1 plan | Form 4 ↗ | |
| Bradbury Robyn L | CNM | Exchange C | April 17, 2026 | April 21, 2026 | 4d | 5,000 | — | — | 10b5-1 plan | Form 4 ↗ | |
| Hope James D | CNM | Buy P | April 7, 2026 | April 9, 2026 | 2d | 1,972 | $51 | $100K | Form 4 ↗ | ||
| Hardwick M Susan | CNM | Other A | April 1, 2026 | April 2, 2026 | 1d | 580 | — | — | Form 4 ↗ | ||
| Giles Jeffrey D | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 21,585 | — | — | derivative | Form 4 ↗ | |
| Giles Jeffrey D | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 3,021 | — | — | Form 4 ↗ | ||
| Whittenburg Mark G | CNM | Sell F | March 11, 2026 | March 13, 2026 | 2d | 331 | $49 | $16K | Form 4 ↗ | ||
| Bradbury Robyn L | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 34,488 | — | — | derivative | Form 4 ↗ | |
| Bradbury Robyn L | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 4,824 | — | — | Form 4 ↗ | ||
| Bradbury Robyn L | CNM | Sell F | March 11, 2026 | March 13, 2026 | 2d | 404 | $49 | $20K | Form 4 ↗ | ||
| Witkowski Mark R | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 131,382 | — | — | derivative | Form 4 ↗ | |
| Witkowski Mark R | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 18,372 | — | — | Form 4 ↗ | ||
| Witkowski Mark R | CNM | Sell F | March 11, 2026 | March 13, 2026 | 2d | 1,685 | $49 | $83K | Form 4 ↗ | ||
| Cowles Bradford A | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 50,676 | — | — | derivative | Form 4 ↗ | |
| Cowles Bradford A | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 7,086 | — | — | Form 4 ↗ | ||
| Cowles Bradford A | CNM | Sell F | March 11, 2026 | March 13, 2026 | 2d | 607 | $49 | $30K | Form 4 ↗ | ||
| Stephens John Weldon | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 6,684 | — | — | derivative | Form 4 ↗ | |
| Stephens John Weldon | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 936 | — | — | Form 4 ↗ | ||
| Stephens John Weldon | CNM | Sell F | March 11, 2026 | March 13, 2026 | 2d | 107 | $49 | $5,260 | Form 4 ↗ | ||
| HUEBERT MICHAEL G. | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 37,539 | — | — | derivative | Form 4 ↗ | |
| HUEBERT MICHAEL G. | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 10,500 | — | — | Form 4 ↗ | ||
| HUEBERT MICHAEL G. | CNM | Sell F | March 11, 2026 | March 13, 2026 | 2d | 447 | $49 | $22K | Form 4 ↗ | ||
| Harper Carla D | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 17,598 | — | — | derivative | Form 4 ↗ | |
| Harper Carla D | CNM | Other A | March 12, 2026 | March 13, 2026 | 1d | 2,463 | — | — | Form 4 ↗ | ||
| Harper Carla D | CNM | Sell F | March 11, 2026 | March 13, 2026 | 2d | 89 | $49 | $4,375 | Form 4 ↗ | ||
| Whittenburg Mark G | CNM | Sell F | March 10, 2026 | March 11, 2026 | 1d | 557 | $49 | $28K | Form 4 ↗ | ||
| Whittenburg Mark G | CNM | Sell F | March 9, 2026 | March 11, 2026 | 2d | 278 | $50 | $14K | Form 4 ↗ | ||
| Harper Carla D | CNM | Sell F | March 10, 2026 | March 11, 2026 | 1d | 189 | $49 | $9,333 | Form 4 ↗ | ||
| Harper Carla D | CNM | Sell F | March 9, 2026 | March 11, 2026 | 2d | 77 | $50 | $3,847 | Form 4 ↗ | ||
| Stephens John Weldon | CNM | Sell F | March 10, 2026 | March 11, 2026 | 1d | 198 | $49 | $9,777 | Form 4 ↗ | ||
| Stephens John Weldon | CNM | Sell F | March 9, 2026 | March 11, 2026 | 2d | 94 | $50 | $4,696 | Form 4 ↗ | ||
| HUEBERT MICHAEL G. | CNM | Sell F | March 9, 2026 | March 11, 2026 | 2d | 350 | $50 | $17K | Form 4 ↗ | ||
| Cowles Bradford A | CNM | Sell F | March 10, 2026 | March 11, 2026 | 1d | 741 | $49 | $37K | Form 4 ↗ | ||
| Cowles Bradford A | CNM | Sell F | March 9, 2026 | March 11, 2026 | 2d | 435 | $50 | $22K | Form 4 ↗ | ||
| Witkowski Mark R | CNM | Sell F | March 10, 2026 | March 11, 2026 | 1d | 937 | $49 | $46K | Form 4 ↗ | ||
| Witkowski Mark R | CNM | Sell F | March 9, 2026 | March 11, 2026 | 2d | 478 | $50 | $24K | Form 4 ↗ | ||
| LeClair Stephen O | CNM | Sell F | March 10, 2026 | March 11, 2026 | 1d | 3,081 | $49 | $152K | Form 4 ↗ | ||
| LeClair Stephen O | CNM | Sell F | March 9, 2026 | March 11, 2026 | 2d | 1,519 | $50 | $76K | Form 4 ↗ | ||
| Bradbury Robyn L | CNM | Sell F | March 10, 2026 | March 11, 2026 | 1d | 205 | $49 | $10K | Form 4 ↗ | ||
| Bradbury Robyn L | CNM | Sell F | March 9, 2026 | March 11, 2026 | 2d | 270 | $50 | $13K | Form 4 ↗ | ||
| Giles Jeffrey D | CNM | Other A | January 26, 2026 | January 28, 2026 | 2d | 10,617 | — | — | derivative | Form 4 ↗ | |
| Giles Jeffrey D | CNM | Other A | January 26, 2026 | January 28, 2026 | 2d | 4,377 | — | — | Form 4 ↗ | ||
| Whittenburg Mark G | CNM | Other G | December 31, 2025 | January 2, 2026 | 2d | 25,500 | — | — | indirectderivative | Form 4 ↗ |
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "Core & Main, Inc.". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
No LDA filing posted since October 2025 names "Core & Main, Inc." as the client. Filings under a subsidiary or trade-association name are not matched — search lobbying.
Related companies
Companies whose stock was traded by the same people who traded CNM, by number of filers in common. It shows overlap in public filings and nothing else.
- BWX Technologies, Inc. BWXT 2 filers in common
- SOMNIGROUP INTERNATIONAL INC. SGI 2 filers in common
- ENTEGRIS INC ENTG 2 filers in common
- QUANTA SERVICES, INC. PWR 2 filers in common
- ROLLINS INC ROL 2 filers in common
- BROWN & BROWN, INC. BRO 2 filers in common
- ITT INC. ITT 2 filers in common
- EMCOR Group, Inc. EME 2 filers in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 4 | 6 | October 22, 2025 | September 9, 2026 | House Clerk search |
| SEC EDGAR, Form 4 | 35 | 61 | January 2, 2026 | October 20, 2026 | Form 4 list on EDGAR |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.