As of the latest Form 4 filed Jul 8, 2026.
What Core & Main Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 46 most recent filings for CNM.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-07-08 | 2026-07-06 | Hope James D Director | PPurchase | +2.07K | $46.01 | $95.1K | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-23 | Castellano James G Director | AAward | +2.80K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-23 | NEWMAN MARGARET Director | AAward | +2.80K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-23 | Hardwick M Susan Director | AAward | +2.80K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-23 | MAZZARELLA KATHLEEN M Director | AAward | +2.80K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-23 | Hope James D Director | AAward | +2.80K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-23 | Amirthalingam Bhavani Director | AAward | +2.80K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-23 | Gipson Dennis G Director | AAward | +2.80K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-23 | Kimbrough Orvin T Director | AAward | +2.80K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-23 | Buck Robert M Director | AAward | +2.80K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | Harper Carla D Senior VP, Human Resources | FTax | −568.00 | $47.25 | $26.8K | No | Form 4 ↗ |
| 2026-04-21 | 2026-04-17 | Bradbury Robyn L Chief Financial Officer | SSale | −3.35K | $52.84 | $177K | Yes (planned) | Form 4 ↗ |
| 2026-04-21 | 2026-04-17 | Bradbury Robyn L, Chief Financial Officer | SSale | −1.65K | $51.94 | $85.5K | Yes (planned) | Form 4 ↗ |
| 2026-04-21 | 2026-04-17 | Bradbury Robyn L, Chief Financial Officer | CConvert | +5.00K | $0.00 | $0.00 | Yes (planned) | Form 4 ↗ |
| 2026-04-09 | 2026-04-07 | Hope James D Director | PPurchase | +1.97K | $50.70 | $100.0K | No | Form 4 ↗ |
| 2026-04-02 | 2026-04-01 | Hardwick M Susan Director | AAward | +580.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-12 | Giles Jeffrey D EVP, Corporate Development | AAward | +3.02K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-12 | Bradbury Robyn L Chief Financial Officer | AAward | +4.82K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-12 | Witkowski Mark R Chief Executive Officer | AAward | +18.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-12 | Cowles Bradford A President | AAward | +7.09K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-12 | Stephens John Weldon Chief Accounting Officer | AAward | +936.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-12 | HUEBERT MICHAEL G. President | AAward | +10.5K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-12 | Harper Carla D Senior VP, Human Resources | AAward | +2.46K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-11 | Whittenburg Mark G General Counsel and Secretary | FTax | −331.00 | $49.16 | $16.3K | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-11 | Bradbury Robyn L Chief Financial Officer | FTax | −404.00 | $49.16 | $19.9K | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-11 | Witkowski Mark R Chief Executive Officer | FTax | −1.69K | $49.16 | $82.8K | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-11 | Cowles Bradford A President | FTax | −607.00 | $49.16 | $29.8K | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-11 | Stephens John Weldon Chief Accounting Officer | FTax | −107.00 | $49.16 | $5.26K | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-11 | HUEBERT MICHAEL G. President | FTax | −447.00 | $49.16 | $22.0K | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-11 | Harper Carla D Senior VP, Human Resources | FTax | −89.00 | $49.16 | $4.38K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-10 | Whittenburg Mark G General Counsel and Secretary | FTax | −557.00 | $49.38 | $27.5K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-10 | Harper Carla D Senior VP, Human Resources | FTax | −189.00 | $49.38 | $9.33K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-10 | Stephens John Weldon Chief Accounting Officer | FTax | −198.00 | $49.38 | $9.78K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-10 | Cowles Bradford A President | FTax | −741.00 | $49.38 | $36.6K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-10 | Witkowski Mark R Chief Executive Officer | FTax | −937.00 | $49.38 | $46.3K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-10 | LeClair Stephen O Executive Chair | FTax | −3.08K | $49.38 | $152K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-10 | Bradbury Robyn L Chief Financial Officer | FTax | −205.00 | $49.38 | $10.1K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-09 | Whittenburg Mark G General Counsel and Secretary | FTax | −278.00 | $49.96 | $13.9K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-09 | Harper Carla D Senior VP, Human Resources | FTax | −77.00 | $49.96 | $3.85K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-09 | Stephens John Weldon Chief Accounting Officer | FTax | −94.00 | $49.96 | $4.70K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-09 | HUEBERT MICHAEL G. President | FTax | −350.00 | $49.96 | $17.5K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-09 | Cowles Bradford A President | FTax | −435.00 | $49.96 | $21.7K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-09 | Witkowski Mark R Chief Executive Officer | FTax | −478.00 | $49.96 | $23.9K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-09 | LeClair Stephen O Executive Chair | FTax | −1.52K | $49.96 | $75.9K | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-09 | Bradbury Robyn L Chief Financial Officer | FTax | −270.00 | $49.96 | $13.5K | No | Form 4 ↗ |
| 2024-05-03 | 2024-05-01 | Hope James D Director | AAward | +329.00 | $0.00 | $0.00 | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also CNM’s full analysis or the market-wide insider trading feed. The tabs above jump to CNM’s other SEC data.
Source: SEC Form 4 filings for CNM, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.