Insider txns (12m)
61
Stock / equity
CNM Core & Main, Inc.
- Company
- Core & Main, Inc.
- Security
- Equity
- Size, estimated from filings
- Large cap ($10B – $200B)
- Insiders on record
- 18
- Members of Congress
- 2
- Latest trade on record
- October 16, 2026
CNM (Core & Main, Inc.) has 61 disclosed insider transactions from 18 insiders in the last 12 months (2 open-market buys, 27 sales, about $1.2M at reported prices) and 6 congressional trades from 2 members of Congress. The most recent disclosure was filed October 20, 2026.
Open-market buys / sales
2 / 27
Congress trades (12m)
6
Distinct filers (12m)
20
Share price
Price and chart by TradingView for Core & Main, Inc.. US share prices here are delayed, not real-time. The trade records on this page come from government filings, not from this chart.
CNM in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
BoughtSold
8 people account for the disclosed buying and selling in CNM over the last 12 months; the most active is Bradbury Robyn L with $306K.
Prices insiders traded at
What price did insiders buy and sell at? Each marker is one open-market trade at the share price reported on its Form 4.
▲ Bought▼ SoldAverage reported price that day
Insiders reported 4 open-market trades in CNM since Apr 7, 2026, at prices from $46.01 to $52.84; the most recent was a purchase at $46.01 on Jul 6, 2026. These are the prices on the filings, not adjusted for stock splits, and not a market price series.
Insider holdings over time
Is an insider building or unwinding a position? Shares held directly after each filing.
Harper Carla DWitkowski Mark R
Harper Carla D reported 13,064 shares held after the latest filing, against 11,500 at the first on record.
Insiders trading CNM
Everyone who filed a Form 4 for this ticker, by number of rows on record. "Bought" and "sold" count open-market purchases (code P) and sales only; awards, option exercises and shares withheld for tax are in the row count but not in those two columns. Showing 15 of 18.
| Insider | Role | Rows | Bought | Sold | Value bought | Value sold | Latest |
|---|---|---|---|---|---|---|---|
| Bradbury Robyn L | Chief Financial Officer | 11 | 0 | 5 | — | $306K | April 17, 2026 |
| Harper Carla D | Senior VP, Human Resources | 7 | 0 | 5 | — | $56K | August 4, 2026 |
| Witkowski Mark R | Chief Executive Officer | 6 | 0 | 3 | — | $153K | October 16, 2026 |
| HUEBERT MICHAEL G. | President | 5 | 0 | 3 | — | $96K | July 22, 2026 |
| Cowles Bradford A | President | 5 | 0 | 3 | — | $88K | March 12, 2026 |
| Stephens John Weldon | Chief Accounting Officer | 5 | 0 | 3 | — | $20K | March 12, 2026 |
| Giles Jeffrey D | EVP, Corporate Development | 4 | 0 | 0 | — | — | March 12, 2026 |
| Whittenburg Mark G | General Counsel and Secretary | 4 | 0 | 3 | — | $58K | March 11, 2026 |
| Hope James D | Director | 3 | 2 | 0 | $195K | — | July 6, 2026 |
| Hardwick M Susan | Director | 2 | 0 | 0 | — | — | June 23, 2026 |
| LeClair Stephen O | Director | 2 | 0 | 2 | — | $228K | March 10, 2026 |
| Amirthalingam Bhavani | Director | 1 | 0 | 0 | — | — | June 23, 2026 |
| Buck Robert M | Director | 1 | 0 | 0 | — | — | June 23, 2026 |
| Castellano James G | Director | 1 | 0 | 0 | — | — | June 23, 2026 |
| Gipson Dennis G | Director | 1 | 0 | 0 | — | — | June 23, 2026 |
What kind of transactions these are 7 Form 4 codes
| Code | Meaning | Rows | Shares | Value at reported prices |
|---|---|---|---|---|
| A | Grant or award | 26 | 387,919 | — |
| F | Shares withheld for tax | 25 | 15,190 | $742K |
| C | Conversion of a derivative | 2 | 10,000 | — |
| G | Gift | 2 | 45,096 | — |
| J | Other acquisition or disposal | 2 | 10,000 | — |
| P | Open-market purchase | 2 | 4,039 | $195K |
| S | Open-market sale | 2 | 5,000 | $263K |
What each code means: Form 4 transaction codes.
Members of Congress trading CNM
Members whose periodic transaction reports name this ticker. Amounts are the sums of the ranges as filed.
| 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 | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Witkowski Mark R | Other G | October 16, 2026 | October 20, 2026 | 4d | 19,596 | — | — | Form 4 ↗ | ||
| Harper Carla D | Sell F | August 4, 2026 | August 5, 2026 | 1d | 242 | $46 | $11K | Form 4 ↗ | ||
| HUEBERT MICHAEL G. | Sell F | July 22, 2026 | July 23, 2026 | 1d | 1,301 | $44 | $57K | Form 4 ↗ | ||
| Hope James D | Buy P | July 6, 2026 | July 8, 2026 | 2d | 2,067 | $46 | $95K | Form 4 ↗ | ||
| Castellano James G | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| NEWMAN MARGARET | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Hardwick M Susan | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| MAZZARELLA KATHLEEN M | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Hope James D | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Amirthalingam Bhavani | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Gipson Dennis G | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Kimbrough Orvin T | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Buck Robert M | Other A | June 23, 2026 | June 24, 2026 | 1d | 2,799 | — | — | Form 4 ↗ | ||
| Harper Carla D | Sell F | June 22, 2026 | June 24, 2026 | 2d | 568 | $47 | $27K | Form 4 ↗ | ||
| Bradbury Robyn L | Exchange C | April 17, 2026 | April 21, 2026 | 4d | 5,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Bradbury Robyn L | Other J | April 17, 2026 | April 21, 2026 | 4d | 5,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Bradbury Robyn L | Other J | April 17, 2026 | April 21, 2026 | 4d | 5,000 | — | — | 10b5-1 planindirectderivative | Form 4 ↗ | |
| Bradbury Robyn L | Sell S | April 17, 2026 | April 21, 2026 | 4d | 3,353 | $53 | $177K | 10b5-1 plan | Form 4 ↗ | |
| Bradbury Robyn L | Sell S | April 17, 2026 | April 21, 2026 | 4d | 1,647 | $52 | $86K | 10b5-1 plan | Form 4 ↗ | |
| Bradbury Robyn L | Exchange C | April 17, 2026 | April 21, 2026 | 4d | 5,000 | — | — | 10b5-1 plan | Form 4 ↗ | |
| Hope James D | Buy P | April 7, 2026 | April 9, 2026 | 2d | 1,972 | $51 | $100K | Form 4 ↗ | ||
| Hardwick M Susan | Other A | April 1, 2026 | April 2, 2026 | 1d | 580 | — | — | Form 4 ↗ | ||
| Giles Jeffrey D | Other A | March 12, 2026 | March 13, 2026 | 1d | 21,585 | — | — | derivative | Form 4 ↗ | |
| Giles Jeffrey D | Other A | March 12, 2026 | March 13, 2026 | 1d | 3,021 | — | — | Form 4 ↗ | ||
| Whittenburg Mark G | Sell F | March 11, 2026 | March 13, 2026 | 2d | 331 | $49 | $16K | Form 4 ↗ | ||
| Bradbury Robyn L | Other A | March 12, 2026 | March 13, 2026 | 1d | 34,488 | — | — | derivative | Form 4 ↗ | |
| Bradbury Robyn L | Other A | March 12, 2026 | March 13, 2026 | 1d | 4,824 | — | — | Form 4 ↗ | ||
| Bradbury Robyn L | Sell F | March 11, 2026 | March 13, 2026 | 2d | 404 | $49 | $20K | Form 4 ↗ | ||
| Witkowski Mark R | Other A | March 12, 2026 | March 13, 2026 | 1d | 131,382 | — | — | derivative | Form 4 ↗ | |
| Witkowski Mark R | Other A | March 12, 2026 | March 13, 2026 | 1d | 18,372 | — | — | Form 4 ↗ | ||
| Witkowski Mark R | Sell F | March 11, 2026 | March 13, 2026 | 2d | 1,685 | $49 | $83K | Form 4 ↗ | ||
| Cowles Bradford A | Other A | March 12, 2026 | March 13, 2026 | 1d | 50,676 | — | — | derivative | Form 4 ↗ | |
| Cowles Bradford A | Other A | March 12, 2026 | March 13, 2026 | 1d | 7,086 | — | — | Form 4 ↗ | ||
| Cowles Bradford A | Sell F | March 11, 2026 | March 13, 2026 | 2d | 607 | $49 | $30K | Form 4 ↗ | ||
| Stephens John Weldon | Other A | March 12, 2026 | March 13, 2026 | 1d | 6,684 | — | — | derivative | Form 4 ↗ | |
| Stephens John Weldon | Other A | March 12, 2026 | March 13, 2026 | 1d | 936 | — | — | Form 4 ↗ | ||
| Stephens John Weldon | Sell F | March 11, 2026 | March 13, 2026 | 2d | 107 | $49 | $5,260 | Form 4 ↗ | ||
| HUEBERT MICHAEL G. | Other A | March 12, 2026 | March 13, 2026 | 1d | 37,539 | — | — | derivative | Form 4 ↗ | |
| HUEBERT MICHAEL G. | Other A | March 12, 2026 | March 13, 2026 | 1d | 10,500 | — | — | Form 4 ↗ | ||
| HUEBERT MICHAEL G. | Sell F | March 11, 2026 | March 13, 2026 | 2d | 447 | $49 | $22K | Form 4 ↗ | ||
| Harper Carla D | Other A | March 12, 2026 | March 13, 2026 | 1d | 17,598 | — | — | derivative | Form 4 ↗ | |
| Harper Carla D | Other A | March 12, 2026 | March 13, 2026 | 1d | 2,463 | — | — | Form 4 ↗ | ||
| Harper Carla D | Sell F | March 11, 2026 | March 13, 2026 | 2d | 89 | $49 | $4,375 | Form 4 ↗ | ||
| Whittenburg Mark G | Sell F | March 10, 2026 | March 11, 2026 | 1d | 557 | $49 | $28K | Form 4 ↗ | ||
| Whittenburg Mark G | Sell F | March 9, 2026 | March 11, 2026 | 2d | 278 | $50 | $14K | Form 4 ↗ | ||
| Harper Carla D | Sell F | March 10, 2026 | March 11, 2026 | 1d | 189 | $49 | $9,333 | Form 4 ↗ | ||
| Harper Carla D | Sell F | March 9, 2026 | March 11, 2026 | 2d | 77 | $50 | $3,847 | Form 4 ↗ | ||
| Stephens John Weldon | Sell F | March 10, 2026 | March 11, 2026 | 1d | 198 | $49 | $9,777 | Form 4 ↗ | ||
| Stephens John Weldon | Sell F | March 9, 2026 | March 11, 2026 | 2d | 94 | $50 | $4,696 | Form 4 ↗ | ||
| HUEBERT MICHAEL G. | Sell F | March 9, 2026 | March 11, 2026 | 2d | 350 | $50 | $17K | Form 4 ↗ | ||
| Cowles Bradford A | Sell F | March 10, 2026 | March 11, 2026 | 1d | 741 | $49 | $37K | Form 4 ↗ | ||
| Cowles Bradford A | Sell F | March 9, 2026 | March 11, 2026 | 2d | 435 | $50 | $22K | Form 4 ↗ | ||
| Witkowski Mark R | Sell F | March 10, 2026 | March 11, 2026 | 1d | 937 | $49 | $46K | Form 4 ↗ | ||
| Witkowski Mark R | Sell F | March 9, 2026 | March 11, 2026 | 2d | 478 | $50 | $24K | Form 4 ↗ | ||
| LeClair Stephen O | Sell F | March 10, 2026 | March 11, 2026 | 1d | 3,081 | $49 | $152K | Form 4 ↗ | ||
| LeClair Stephen O | Sell F | March 9, 2026 | March 11, 2026 | 2d | 1,519 | $50 | $76K | Form 4 ↗ | ||
| Bradbury Robyn L | Sell F | March 10, 2026 | March 11, 2026 | 1d | 205 | $49 | $10K | Form 4 ↗ | ||
| Bradbury Robyn L | Sell F | March 9, 2026 | March 11, 2026 | 2d | 270 | $50 | $13K | Form 4 ↗ | ||
| Giles Jeffrey D | Other A | January 26, 2026 | January 28, 2026 | 2d | 10,617 | — | — | derivative | Form 4 ↗ | |
| Giles Jeffrey D | Other A | January 26, 2026 | January 28, 2026 | 2d | 4,377 | — | — | Form 4 ↗ | ||
| Whittenburg Mark G | Other G | December 31, 2025 | January 2, 2026 | 2d | 25,500 | — | — | indirectderivative | Form 4 ↗ |
Congressional trades
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| April McClain Delaney | Sell | August 25, 2026 | September 9, 2026 | 15d | — | — | $100K–$250K | dependent | House PTR ↗ | |
| April McClain Delaney | Sell | June 12, 2026 | July 7, 2026 | 25d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| Lisa C. McClain | Buy | October 30, 2025 | November 21, 2025 | 22d | — | — | $1,001–$15K | spouse | House PTR ↗ | |
| Lisa C. McClain | Sell | October 30, 2025 | November 21, 2025 | 22d | — | — | $1,001–$15K | spouse | House PTR ↗ | |
| Lisa C. McClain | Sell | October 31, 2025 | November 21, 2025 | 21d | — | — | $1,001–$15K | spouse | House PTR ↗ | |
| Lisa C. McClain | Buy | September 11, 2025 | October 22, 2025 | 41d | — | — | $1,001–$15K | spouse | House PTR ↗ |
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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.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- How to read a congressional trade report Owner tells you whose asset it was: the member, the spouse, a dependent child, or held jointly.
- Why congressional trade amounts are ranges There are ten ranges; the lowest is $1,001–$15,000 and the highest is over $50,000,000.
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.
Insider rows are Form 4 filings for this issuer from SEC EDGAR; congressional rows are periodic transaction reports parsed from the House Clerk and the Senate eFD. Values use the reported price for Form 4 and the disclosed range for Congress. See methodology and corrections.
Not investment advice. Disclosures are shown as filed and may lag the trade or be amended. No recommendation is made or implied.