Core & Main
CNM · NYSE
Who owns CNM
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 40.7% of CNM’s shares.
- BlackRock Institutional Trust Company, N.A.8.2%
- Capital World Investors5.9%
- Vanguard Capital Management, LLC4.4%
- Vanguard Portfolio Management, LLC4.3%
- Next 6 largest institutions17.9%
- All other shareholders59.3%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 15.93M | 8.23% |
| Capital World Investors | 11.47M | 5.93% |
| Vanguard Capital Management, LLC | 8.52M | 4.40% |
| Vanguard Portfolio Management, LLC | 8.25M | 4.26% |
| First Trust Advisors L.P. | 6.25M | 3.23% |
| Fidelity Management & Research Company LLC | 6.22M | 3.22% |
| State Street Investment Management (US) | 5.91M | 3.05% |
| Select Equity Group, L.P. | 5.84M | 3.02% |
| Royal London Asset Management Ltd. | 5.49M | 2.84% |
| Pictet Asset Management Ltd. | 4.96M | 2.56% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Mid-Cap ETF | 6.59M | 3.40% |
| Vanguard Total Stock Market Index Fund | 6.00M | 3.10% |
| First Trust RBA Amer Industrial Renaissance ETF | 5.49M | 2.84% |
| Pictet - Water | 4.95M | 2.56% |
| Vanguard Small-Cap Index Fund | 4.32M | 2.23% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $95.11K (1 trade) of CNM on the open market, with no sales.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Harper Carla D | Tax withholding | 242 | $11.21K |
| HUEBERT MICHAEL G. | Tax withholding | 1.30K | $56.92K |
| Hope James D | Buy | 2.07K | $95.11K |
| Castellano James G | Award | 2.80K | — |
| Gipson Dennis G | Award | 2.80K | — |
| Kimbrough Orvin T | Award | 2.80K | — |
| Amirthalingam Bhavani | Award | 2.80K | — |
| Buck Robert M | Award | 2.80K | — |
| Hardwick M Susan | Award | 2.80K | — |
| NEWMAN MARGARET | Award | 2.80K | — |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Lisa McClainHouse | Sale | $1K–$15K | Oct 31, 2025 |
| Lisa McClainHouse | Sale | $1K–$15K | Oct 30, 2025 |
Short interest
Settled Sep 30, 2026
- Shares short
- 12.47M
- Days to cover
- 4.77
- % of shares outstanding
- 6.44%
- Average daily volume
- 2.61M
- Change since last report
- +22.6%
Information on this page is provided for informational purposes only and is not a recommendation to buy, sell or hold any security. Investing involves risk, including possible loss of principal. Market data is delayed at least 15 minutes and is provided without warranty. Analyst ratings, price targets and company data come from third-party sources. Past performance does not guarantee future results.