Core & Main, Inc. (CNM) Insider Trading
Over the last 3 months, CNM insiders made 1 open-market buy and 0 sales, a net purchase of $95K (SEC Form 4). Over the last 6 months, 325 institutions increased and 346 reduced their position (13F).
Insider Activity
Sentiment
100/100
Buys (3m)
1
Sells (3m)
0
Net (3m)
$95.1K
Insiders buying
Insider trades by month Buys Sells
May
Jun
Jul
Aug
Apr
Jul
Context3-month price -12.4%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 5, 2026 | Harper Carla Dofficer: Senior VP, Human Resources | Tax | 242 | $46.32 |
| Jul 23, 2026 | HUEBERT MICHAEL G.officer: President | Tax | 1,301 | $43.75 |
| Jul 8, 2026 | Hope James Ddirector | Buy | 2,067 | $46.01 |
| Jun 24, 2026 | Hardwick M Susandirector | Grant | 2,799 | — |
| Jun 24, 2026 | MAZZARELLA KATHLEEN Mdirector | Grant | 2,799 | — |
| Jun 24, 2026 | Hope James Ddirector | Grant | 2,799 | — |
| Jun 24, 2026 | Gipson Dennis Gdirector | Grant | 2,799 | — |
| Jun 24, 2026 | Kimbrough Orvin Tdirector | Grant | 2,799 | — |
| Jun 24, 2026 | Buck Robert Mdirector | Grant | 2,799 | — |
| Jun 24, 2026 | Harper Carla Dofficer: Senior VP, Human Resources | Tax | 568 | $47.25 |
| Jun 24, 2026 | Amirthalingam Bhavanidirector | Grant | 2,799 | — |
| Jun 24, 2026 | Castellano James Gdirector | Grant | 2,799 | — |
| Jun 24, 2026 | NEWMAN MARGARETdirector | Grant | 2,799 | — |
| Apr 21, 2026 | Bradbury Robyn Lofficer: Chief Financial Officer | Sell | 1,647 | $51.94 |
| Apr 21, 2026 | Bradbury Robyn Lofficer: Chief Financial Officer | Sell | 3,353 | $52.84 |
| Apr 9, 2026 | Hope James Ddirector | Buy | 1,972 | $50.70 |
| Apr 2, 2026 | Hardwick M Susandirector | Grant | 580 | — |
| Mar 13, 2026 | Whittenburg Mark Gofficer: General Counsel and Secretary | Tax | 331 | $49.16 |
| Mar 13, 2026 | Bradbury Robyn Lofficer: Chief Financial Officer | Tax | 404 | $49.16 |
| Mar 13, 2026 | Bradbury Robyn Lofficer: Chief Financial Officer | Grant | 4,824 | — |
| Mar 13, 2026 | Bradbury Robyn Lofficer: Chief Financial Officer | Grant | 34,488 | $47.63 |
| Mar 13, 2026 | Witkowski Mark Rdirector, officer: Chief Executive Officer | Tax | 1,685 | $49.16 |
| Mar 13, 2026 | Witkowski Mark Rdirector, officer: Chief Executive Officer | Grant | 18,372 | — |
| Mar 13, 2026 | Witkowski Mark Rdirector, officer: Chief Executive Officer | Grant | 131,382 | $47.63 |
| Mar 13, 2026 | Cowles Bradford Aofficer: President | Tax | 607 | $49.16 |
| Mar 13, 2026 | Cowles Bradford Aofficer: President | Grant | 7,086 | — |
| Mar 13, 2026 | Cowles Bradford Aofficer: President | Grant | 50,676 | $47.63 |
| Mar 13, 2026 | Stephens John Weldonofficer: Chief Accounting Officer | Tax | 107 | $49.16 |
| Mar 13, 2026 | Stephens John Weldonofficer: Chief Accounting Officer | Grant | 936 | — |
| Mar 13, 2026 | Stephens John Weldonofficer: Chief Accounting Officer | Grant | 6,684 | $47.63 |
Source: CNM SEC Form 4 filings, latest Aug 5, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their CNM positions over the last 6 months (SEC Form 13F).
Increased
325
New positions
148
Reduced
346
Sold out
81
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BLACKROCK, INC. | Increased | 19.2M | May 13, 2026 |
| BlackRock, Inc. | Reduced | 18.4M | Aug 7, 2026 |
| CAPITAL WORLD INVESTORS | Increased | 11.6M | May 13, 2026 |
| Capital World Investors | Reduced | 11.5M | Aug 12, 2026 |
| FMR LLC | Increased | 9.0M | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 8.5M | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 8.5M | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 8.3M | Aug 13, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 7.8M | May 8, 2026 |
| SELECT EQUITY GROUP, L.P. | Reduced | 7.3M | May 15, 2026 |
| PICTET ASSET MANAGEMENT HOLDING SA | Reduced | 6.5M | Apr 22, 2026 |
| FIRST TRUST ADVISORS LP | Increased | 6.2M | Aug 11, 2026 |
| FIRST TRUST ADVISORS LP | Increased | 6.1M | May 13, 2026 |
| MORGAN STANLEY | Increased | 6.0M | Aug 13, 2026 |
| STATE STREET CORP | Increased | 5.9M | Aug 7, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.