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NYSE · CIK 0001856525

CNM Core & Main, Inc.

Insider trading from SEC Form 4. Last filing Sep 16, 2025. Close $40.35 on Oct 9, 2026, 0% from the 52-week low and -32% from the high.

Last 90 days

Net insider value
$0
no open-market trades
Buys
0
$0 by 0 insiders
Sells
0
$0 by 0 insiders
Insiders on file
19
with a Form 4 at this company

Price and insider trades, last year

CNMOct 9, 2026 · close 40.35

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™

Signals

Open-market buys and sells at Core & Main, Inc., scored.

ScoreInsiderValueHoldingsPrice contextFiled
50ModerateMark R Witkowski
Chief Executive Officer
sell
$6.4M
100,000 shares
-74%+67% from low-1% from high
41ModerateRobyn L Bradbury
Chief Financial Officer
sell
$323k
5,000 shares
-37%+68% from low0% from high
55ModerateJames G Castellano
director
sell
$2.7M
43,994 shares
-100%+60% from low-1% from high
65NotableMark R Witkowski
Chief Executive Officer
sell
$6.1M
100,000 shares
-74%+59% from low-1% from high
55ModerateOrvin T Kimbrough
director
sell
$1.5M
23,962 shares
-63%+60% from low-1% from high
65NotableStephen O LeClair
Executive Chair
sell
$7.8M
125,000 shares
-83%+61% from low0% from high
55ModerateRobyn L Bradbury
Chief Financial Officer
sell
$1.5M
25,000 shares
-75%+58% from low0% from high
55ModerateMark G Whittenburg
General Counsel and Secretary
sell
$3.0M
50,000 shares
-472%+54% from low0% from high
55ModerateLaura K Schneider
Chief Human Resources Officer
sell
$2.6M
45,695 shares
-78%+52% from low0% from high
24WeakJohn R Schaller
Executive Vice President
sell
$539k
9,794 shares
-33%+41% from low-5% from high
40ModerateJohn Weldon Stephens
Chief Accounting Officer
sell
$2.2M
41,964 shares
-293%+36% from low-8% from high
40ModerateJohn Weldon Stephens
Chief Accounting Officer
sell
$2.1M
41,963 shares
-91%+31% from low-11% from high
23WeakJohn R Schaller
Executive Vice President
sell
$868k
19,292 shares
-55%-
25WeakJohn R Schaller
Executive Vice President
sell
$1.0M
21,868 shares
-57%-
45ModerateBradford A Cowles
President
sell
$1.4M
25,000 shares
-61%-
55ModerateMark G Whittenburg
General Counsel and Secretary
sell
$2.8M
50,000 shares
-519%-
60NotableBradford A Cowles
President
sell
$1.3M
25,000 shares
-88%-
40ModerateJohn R Schaller
Executive Vice President
sell
$3.1M
60,452 shares
-107%-
55ModerateMark G Whittenburg
General Counsel and Secretary
sell
$2.5M
50,000 shares
-87%-
65NotableStephen O LeClair
Chief Executive Officer
sell
$11M
200,000 shares
-68%-
53ModerateMargaret Newman
director
sell
$829k
15,000 shares
-56%-
60NotableBradford A Cowles
President
sell
$2.8M
50,000 shares
-73%-
55ModerateJeffrey D Giles
EVP, Corporate Department
sell
$1.4M
25,000 shares
-68%-

Congressional trades

12 trades in CNM disclosed by members of Congress under the STOCK Act. All congressional trades.

MemberTradeAssetReported rangeTrade / filing dateSource
SaleCNM
Core & Main, Inc. Class A Common Stock
$100k to $250kAug 25 / Sep 9
15 days after the trade
Clerk
Partial saleCNM
Core & Main, Inc. Class A Common Stock
$1,001 to $15kJun 12 / Jul 7
25 days after the trade
Clerk
Lisa C. McClain
House · R-MI
SaleCNM
Core & Main, Inc. Class A Common Stock
$1,001 to $15kOct 31, 2025 / Nov 21, 2025
21 days after the trade
Clerk
Lisa C. McClain
House · R-MI
SaleCNM
Core & Main, Inc. Class A Common Stock
$1,001 to $15kOct 30, 2025 / Nov 21, 2025
22 days after the trade
Clerk
Lisa C. McClain
House · R-MI
PurchaseCNM
Core & Main, Inc. Class A Common Stock
$1,001 to $15kOct 30, 2025 / Nov 21, 2025
22 days after the trade
Clerk
Lisa C. McClain
House · R-MI
PurchaseCNM
Core & Main, Inc. Class A Common Stock
$1,001 to $15kSep 11, 2025 / Oct 22, 2025
41 days after the trade
Clerk
Partial saleCNM
Core & Main, Inc. Class A Common Stock
$15k to $50kAug 4, 2025 / Sep 2, 2025
29 days after the trade
Clerk
Partial saleCNM
Core & Main, Inc. Class A Common Stock
$15k to $50kAug 11, 2025 / Sep 2, 2025
22 days after the trade
Clerk
Lisa C. McClain
House · R-MI
PurchaseCNM
Core & Main, Inc. Class A Common Stock
$1,001 to $15kJun 11, 2025 / Aug 13, 2025
63 days after the trade
Clerk
Lisa C. McClain
House · R-MI
SaleCNM
Core & Main, Inc. Class A Common Stock
$1,001 to $15kJun 17, 2025 / Aug 13, 2025
57 days after the trade
Clerk
PurchaseCNM
Core & Main, Inc. Class A Common Stock
$1,001 to $15kApr 7, 2025 / May 2, 2025
25 days after the trade
Clerk
PurchaseCNM
Core & Main, Inc. Class A Common Stock
$1,001 to $15kFeb 8, 2025 / Mar 20, 2025
40 days after the trade
Clerk

Transactions

The last 100 rows filed, every code.

DateInsiderTransactionSharesPriceValueHoldings afterFiled
Sep 12, 2025John Weldon Stephens
Chief Accounting Officer
MOption exercise
Class A Common Stock
+12,717$20.81$265k16,837Sep 16, 2025
Sep 12, 2025John Weldon Stephens
Chief Accounting Officer
MOption exercise
Options (Rights to Buy)derivative
-12,717$0.00$00Sep 16, 2025
Sep 3, 2025Carla D Harper
Senior VP, Human Resources
AGrant or award
Class A Common Stock
+2,091$0.00$011,766Sep 5, 2025
Aug 18, 2025Mark R Witkowski
Chief Executive Officer
CConversion
Class A Common Stock10b5-1
+100,000$0.00$0135,847Aug 20, 2025
Aug 18, 2025Mark R Witkowski
Chief Executive Officer
SOpen-market sale
Class A Common Stock10b5-1
-100,000$64.08$6.4M35,847Aug 20, 2025
Aug 18, 2025Mark R Witkowski
Chief Executive Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-100,000$0.00$0616,250Aug 20, 2025
Aug 18, 2025Mark R Witkowski
Chief Executive Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
+100,000$0.00$0100,000Aug 20, 2025
Aug 18, 2025Mark R Witkowski
Chief Executive Officer
CConversion
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
-100,000$0.00$00Aug 20, 2025
Jul 22, 2025Michael G. Huebert
President
FTax withholding
Class A Common Stock
-1,337$65.03$87k15,634Jul 23, 2025
Jul 22, 2025Robyn L Bradbury
Chief Financial Officer
CConversion
Class A Common Stock10b5-1
+5,000$0.00$013,555Jul 23, 2025
Jul 22, 2025Robyn L Bradbury
Chief Financial Officer
SOpen-market sale
Class A Common Stock10b5-1
-5,000$64.51$323k8,555Jul 23, 2025
Jul 22, 2025Robyn L Bradbury
Chief Financial Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-5,000$0.00$0157,447Jul 23, 2025
Jul 22, 2025Robyn L Bradbury
Chief Financial Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
+5,000$0.00$05,000Jul 23, 2025
Jul 22, 2025Robyn L Bradbury
Chief Financial Officer
CConversion
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
-5,000$0.00$00Jul 23, 2025
Jul 18, 2025Orvin T Kimbrough
director
JOther
Class A Common Stockindirect: By LLC10b5-1
-5$0.00$03Jul 21, 2025
Jul 17, 2025Mark R Witkowski
Chief Executive Officer
CConversion
Class A Common Stock10b5-1
+100,000$0.00$0135,847Jul 21, 2025
Jul 18, 2025James G Castellano
director
CConversion
Class A Common Stockindirect: By Trust10b5-1
+34,674$0.00$043,994Jul 21, 2025
Jul 18, 2025James G Castellano
director
SOpen-market sale
Class A Common Stockindirect: By Trust10b5-1
-43,994$61.98$2.7M0Jul 21, 2025
Jul 18, 2025Orvin T Kimbrough
director
JOther
Class A Common Stock10b5-1
+5$0.00$013,963Jul 21, 2025
Jul 17, 2025Mark R Witkowski
Chief Executive Officer
SOpen-market sale
Class A Common Stock10b5-1
-72,331$61.12$4.4M63,516Jul 21, 2025
Jul 18, 2025Orvin T Kimbrough
director
CConversion
Class A Common Stock10b5-1
+23,957$0.00$037,920Jul 21, 2025
Jul 17, 2025Mark R Witkowski
Chief Executive Officer
SOpen-market sale
Class A Common Stock10b5-1
-27,669$61.63$1.7M35,847Jul 21, 2025
Jul 18, 2025James G Castellano
director
JOther
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-34,674$0.00$0158,946Jul 21, 2025
Jul 17, 2025Mark R Witkowski
Chief Executive Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-100,000$0.00$0716,250Jul 21, 2025
Jul 18, 2025Orvin T Kimbrough
director
SOpen-market sale
Class A Common Stock10b5-1
-23,962$61.77$1.5M13,958Jul 21, 2025
Jul 17, 2025Mark R Witkowski
Chief Executive Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
+100,000$0.00$0100,000Jul 21, 2025
Jul 18, 2025James G Castellano
director
JOther
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By Trust10b5-1
+34,674$0.00$034,674Jul 21, 2025
Jul 18, 2025Orvin T Kimbrough
director
JOther
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-23,957$0.00$029,747Jul 21, 2025
Jul 17, 2025Mark R Witkowski
Chief Executive Officer
CConversion
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
-100,000$0.00$00Jul 21, 2025
Jul 18, 2025James G Castellano
director
CConversion
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By Trust10b5-1
-34,674$0.00$00Jul 21, 2025
Jul 18, 2025Orvin T Kimbrough
director
JOther
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
+23,957$0.00$023,957Jul 21, 2025
Jul 18, 2025Orvin T Kimbrough
director
CConversion
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
-23,957$0.00$00Jul 21, 2025
Jul 18, 2025Orvin T Kimbrough
director
FTax withholding
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-1,038$0.00$028,709Jul 21, 2025
Jul 3, 2025Stephen O LeClair
Executive Chair
MOption exercise
Class A Common Stock
+80,028$20.81$1.7M150,764Jul 8, 2025
Jul 3, 2025Stephen O LeClair
Executive Chair
SOpen-market sale
Class A Common Stock
-80,028$62.27$5.0M70,736Jul 8, 2025
Jul 7, 2025Stephen O LeClair
Executive Chair
MOption exercise
Class A Common Stock
+44,972$20.81$936k115,708Jul 8, 2025
Jul 7, 2025Stephen O LeClair
Executive Chair
SOpen-market sale
Class A Common Stock
-44,972$61.91$2.8M70,736Jul 8, 2025
Jul 3, 2025Stephen O LeClair
Executive Chair
MOption exercise
Options (Rights to Buy)derivative
-80,028$0.00$0180,849Jul 8, 2025
Jul 7, 2025Stephen O LeClair
Executive Chair
MOption exercise
Options (Rights to Buy)derivative
-44,972$0.00$0135,877Jul 8, 2025
Jul 1, 2025Robyn L Bradbury
Chief Financial Officer
JOther
Class A Common Stockindirect: By LLC10b5-1
-43$0.00$022Jul 3, 2025
Jul 1, 2025Robyn L Bradbury
Chief Financial Officer
JOther
Class A Common Stock10b5-1
+43$0.00$08,598Jul 3, 2025
Jul 1, 2025Robyn L Bradbury
Chief Financial Officer
CConversion
Class A Common Stock10b5-1
+24,957$0.00$033,555Jul 3, 2025
Jul 1, 2025Robyn L Bradbury
Chief Financial Officer
SOpen-market sale
Class A Common Stock10b5-1
-13,363$59.97$801k20,192Jul 3, 2025
Jul 1, 2025Robyn L Bradbury
Chief Financial Officer
SOpen-market sale
Class A Common Stock10b5-1
-11,318$61.08$691k8,874Jul 3, 2025
Jul 1, 2025Robyn L Bradbury
Chief Financial Officer
SOpen-market sale
Class A Common Stock10b5-1
-319$61.58$20k8,555Jul 3, 2025
Jul 1, 2025Robyn L Bradbury
Chief Financial Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-24,957$0.00$0162,447Jul 3, 2025
Jul 1, 2025Robyn L Bradbury
Chief Financial Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
+24,957$0.00$024,957Jul 3, 2025
Jul 1, 2025Robyn L Bradbury
Chief Financial Officer
CConversion
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
-24,957$0.00$00Jul 3, 2025
Jun 24, 2025Bhavani Amirthalingam
director
AGrant or award
Class A Common Stock
+2,189$0.00$015,156Jun 26, 2025
Jun 24, 2025Robert M Buck
director
AGrant or award
Class A Common Stock
+2,189$0.00$013,050Jun 26, 2025
Jun 24, 2025James G Castellano
director
AGrant or award
Class A Common Stock
+2,189$0.00$04,638Jun 26, 2025
Jun 24, 2025Kathleen M Mazzarella
director
AGrant or award
Class A Common Stock
+2,189$0.00$013,958Jun 26, 2025
Jun 24, 2025James D Hope
director
AGrant or award
Class A Common Stock
+2,189$0.00$04,967Jun 26, 2025
Jun 24, 2025Orvin T Kimbrough
director
AGrant or award
Class A Common Stock
+2,189$0.00$013,958Jun 26, 2025
Jun 24, 2025Dennis G Gipson
director
AGrant or award
Class A Common Stock
+2,189$0.00$013,958Jun 26, 2025
Jun 24, 2025Margaret Newman
director
AGrant or award
Class A Common Stock
+2,189$0.00$013,958Jun 26, 2025
Jun 6, 2025Mark G Whittenburg
General Counsel and Secretary
CConversion
Class A Common Stock10b5-1
+900$0.00$010,591Jun 10, 2025
Jun 6, 2025Mark G Whittenburg
General Counsel and Secretary
SOpen-market sale
Class A Common Stock10b5-1
-900$60.03$54k9,691Jun 10, 2025
Jun 9, 2025Mark G Whittenburg
General Counsel and Secretary
CConversion
Class A Common Stock10b5-1
+49,100$0.00$058,791Jun 10, 2025
Jun 9, 2025Mark G Whittenburg
General Counsel and Secretary
SOpen-market sale
Class A Common Stock10b5-1
-49,100$60.03$2.9M9,691Jun 10, 2025
Jun 6, 2025Mark G Whittenburg
General Counsel and Secretary
JOther
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-900$0.00$0301,912Jun 10, 2025
Jun 6, 2025Mark G Whittenburg
General Counsel and Secretary
JOther
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
+900$0.00$0900Jun 10, 2025
Jun 6, 2025Mark G Whittenburg
General Counsel and Secretary
CConversion
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
-900$0.00$00Jun 10, 2025
Jun 9, 2025Mark G Whittenburg
General Counsel and Secretary
JOther
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-49,100$0.00$0252,812Jun 10, 2025
Jun 9, 2025Mark G Whittenburg
General Counsel and Secretary
JOther
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
+49,100$0.00$049,100Jun 10, 2025
Jun 9, 2025Mark G Whittenburg
General Counsel and Secretary
CConversion
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
-49,100$0.00$00Jun 10, 2025
Jun 3, 2025Laura K Schneider
Chief Human Resources Officer
CConversion
Class A Common Stock10b5-1
+45,695$0.00$058,568Jun 5, 2025
Jun 3, 2025Laura K Schneider
Chief Human Resources Officer
SOpen-market sale
Class A Common Stock10b5-1
-45,695$56.25$2.6M12,873Jun 5, 2025
Jun 3, 2025Laura K Schneider
Chief Human Resources Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-45,695$0.00$0473,233Jun 5, 2025
Jun 3, 2025Laura K Schneider
Chief Human Resources Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
+45,695$0.00$045,695Jun 5, 2025
Jun 3, 2025Laura K Schneider
Chief Human Resources Officer
CConversion
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
-45,695$0.00$00Jun 5, 2025
Jun 3, 2025Laura K Schneider
Chief Human Resources Officer
FTax withholding
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-4,305$0.00$0468,928Jun 5, 2025
May 28, 2025John R Schaller
Executive Vice President
MOption exercise
Class A Common Stock10b5-1
+9,794$50.12$491k29,483May 30, 2025
May 28, 2025John R Schaller
Executive Vice President
SOpen-market sale
Class A Common Stock10b5-1
-9,794$55.00$539k19,689May 30, 2025
May 28, 2025John R Schaller
Executive Vice President
MOption exercise
Options (Rights to Buy)derivative10b5-1
-9,794$0.00$019,588May 30, 2025
Apr 28, 2025John Weldon Stephens
Chief Accounting Officer
CConversion
Class A Common Stock10b5-1
+10,214$0.00$014,334Apr 30, 2025
Apr 28, 2025John Weldon Stephens
Chief Accounting Officer
SOpen-market sale
Class A Common Stock10b5-1
-10,214$53.02$542k4,120Apr 30, 2025
Apr 29, 2025John Weldon Stephens
Chief Accounting Officer
CConversion
Class A Common Stock10b5-1
+31,750$0.00$035,870Apr 30, 2025
Apr 29, 2025John Weldon Stephens
Chief Accounting Officer
SOpen-market sale
Class A Common Stock10b5-1
-31,750$53.03$1.7M4,120Apr 30, 2025
Apr 28, 2025John Weldon Stephens
Chief Accounting Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-10,214$0.00$0111,750Apr 30, 2025
Apr 28, 2025John Weldon Stephens
Chief Accounting Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
+10,214$0.00$010,214Apr 30, 2025
Apr 28, 2025John Weldon Stephens
Chief Accounting Officer
CConversion
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
-10,214$0.00$00Apr 30, 2025
Apr 29, 2025John Weldon Stephens
Chief Accounting Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-31,750$0.00$080,000Apr 30, 2025
Apr 29, 2025John Weldon Stephens
Chief Accounting Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
+31,750$0.00$031,750Apr 30, 2025
Apr 29, 2025John Weldon Stephens
Chief Accounting Officer
CConversion
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
-31,750$0.00$00Apr 30, 2025
Apr 17, 2025James G Castellano
director
GGift
Class A Common Stock
-9,320$0.00$02,449Apr 22, 2025
Apr 17, 2025James G Castellano
director
GGift
Class A Common Stockindirect: By Trust
+9,320$0.00$09,320Apr 22, 2025
Apr 17, 2025James G Castellano
director
GGift
Class A Common Stock
-9,320$0.00$02,449Apr 21, 2025
Apr 17, 2025James G Castellano
director
GGift
Class A Common Stockindirect: By Trust
+9,320$0.00$09,320Apr 21, 2025
Apr 2, 2025John Weldon Stephens
Chief Accounting Officer
CConversion
Class A Common Stock10b5-1
+41,963$0.00$046,083Apr 4, 2025
Apr 2, 2025John Weldon Stephens
Chief Accounting Officer
SOpen-market sale
Class A Common Stock10b5-1
-41,963$50.48$2.1M4,120Apr 4, 2025
Apr 2, 2025John Weldon Stephens
Chief Accounting Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-41,963$0.00$0126,049Apr 4, 2025
Apr 2, 2025John Weldon Stephens
Chief Accounting Officer
JOther
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
+41,963$0.00$041,963Apr 4, 2025
Apr 2, 2025John Weldon Stephens
Chief Accounting Officer
CConversion
Class B Common Stock and Limited Partnership Interestsderivative10b5-1
-41,963$0.00$00Apr 4, 2025
Apr 2, 2025John Weldon Stephens
Chief Accounting Officer
FTax withholding
Class B Common Stock and Limited Partnership Interestsderivativeindirect: By LLC10b5-1
-4,085$0.00$0121,964Apr 4, 2025
Mar 31, 2025Robyn L Bradbury
Chief Financial Officer
AGrant or award
Class A Common Stock
+2,913$0.00$08,555Apr 2, 2025
Mar 31, 2025Mark R Witkowski
Chief Executive Officer
AGrant or award
Class A Common Stock
+10,092$0.00$035,847Apr 2, 2025
Mar 31, 2025Mark R Witkowski
Chief Executive Officer
AGrant or award
Options (Rights to Buy)derivative
+73,458$0.00$073,458Apr 2, 2025
Mar 31, 2025Robyn L Bradbury
Chief Financial Officer
AGrant or award
Options (Rights to Buy)derivative
+21,192$0.00$021,192Apr 2, 2025
Mar 13, 2025Michael G. Huebert
President
AGrant or award
Class A Common Stock
+4,494$0.00$016,971Mar 17, 2025

Insiders

Everyone who has filed a Form 4 here.

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

CNM insider trading: Core & Main, Inc. | InsiderTell