MarketPeel
Insider Trading Intelligence
Pricing
…
MW

Mark R. Witkowski

CNM
CHIEF EXECUTIVE OFFICER · CORE & MAIN, INC. · CIK 0001866738
FILING MIX · LIFETIME45%/55%
BUYS
29
SELLS
35
TOTAL VALUE
$22.56M
COMPANIES
1
ACTIVE SINCE
Mar 2022
HOLDINGS NOW
51,119
AVG SELL PX
$52.64
TRADE KIND
SHOWING 64 / 64
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
9 backtested trades · 8 horizons · 6 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Mark R. Witkowski, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d9+33.33%+2.08%+0.91%+1.17%+0.70%—
14d9+22.22%+1.84%+0.77%+1.07%+0.49%—
30d9+22.22%+0.87%+2.24%-1.37%+2.00%—
60d9+55.56%-0.58%+5.95%-6.53%-21.90%—
90d9+55.56%+3.66%+7.93%-4.27%-21.56%—
180d9+55.56%+30.40%+14.55%+15.85%-16.23%—
1y9(3 pending)+33.33%+19.79%+25.09%-5.30%-6.34%—
2y9(3 pending)+33.33%+36.26%+50.55%-14.30%-5.43%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
CNM · 51,119 shares · as of Mar 12, 2026
0249,063498,125747,188996,2502023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
FLOW · 29 buys / 35 sellsCOVERAGE · 17 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
CNM
CORE & MAIN, INC.
PURCHASEGRANT
Stock grant
131,382——131,382Mar 12, 2026Mar 13, 2026 ↗View →
CNM
CORE & MAIN, INC.
PURCHASEGRANT
Stock grant
18,372——51,119Mar 12, 2026Mar 13, 2026 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Executive Officer
1,685$49.16$82.8K32,747Mar 11, 2026Mar 13, 2026 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Executive Officer
937$49.38$46.3K34,432Mar 10, 2026Mar 11, 2026 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Executive Officer
478$49.96$23.9K35,369Mar 9, 2026Mar 11, 2026 ↗View →
CNM
CORE & MAIN, INC.
SALE10b5-1
10b5-1 plan
100,000$64.08$6.41M35,847Aug 18, 2025Aug 20, 2025 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Executive Officer
100,000——100,000Aug 18, 2025Aug 20, 2025 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Executive Officer
100,000——135,847Aug 18, 2025Aug 20, 2025 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Executive Officer
100,000——616,250Aug 18, 2025Aug 20, 2025 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Executive Officer
100,000——0Aug 18, 2025Aug 20, 2025 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Executive Officer
100,000——100,000Jul 17, 2025Jul 21, 2025 ↗View →
CNM
CORE & MAIN, INC.
SALE10b5-1
10b5-1 plan
27,669$61.63$1.71M35,847Jul 17, 2025Jul 21, 2025 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Executive Officer
100,000——135,847Jul 17, 2025Jul 21, 2025 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Executive Officer
100,000——716,250Jul 17, 2025Jul 21, 2025 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Executive Officer
100,000——0Jul 17, 2025Jul 21, 2025 ↗View →
CNM
CORE & MAIN, INC.
SALE10b5-1
10b5-1 plan
72,331$61.12$4.42M63,516Jul 17, 2025Jul 21, 2025 ↗View →
CNM
CORE & MAIN, INC.
PURCHASEGRANT
Stock grant
10,092——35,847Mar 31, 2025Apr 2, 2025 ↗View →
CNM
CORE & MAIN, INC.
PURCHASEGRANT
Stock grant
73,458——73,458Mar 31, 2025Apr 2, 2025 ↗View →
CNM
CORE & MAIN, INC.
PURCHASEGRANT
Stock grant
7,296——25,755Mar 13, 2025Mar 17, 2025 ↗View →
CNM
CORE & MAIN, INC.
PURCHASEGRANT
Stock grant
53,094——53,094Mar 13, 2025Mar 17, 2025 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
925$46.55$43.1K18,459Mar 11, 2025Mar 13, 2025 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
996$46.69$46.5K19,384Mar 10, 2025Mar 11, 2025 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
536$47.87$25.7K20,380Mar 7, 2025Mar 11, 2025 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Financial Officer
50,000——73,898May 8, 2024May 10, 2024 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
50,000——816,250May 8, 2024May 10, 2024 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Financial Officer
50,000——50,000May 8, 2024May 10, 2024 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
50,000——0May 8, 2024May 10, 2024 ↗View →
CNM
CORE & MAIN, INC.
SALE10b5-1
10b5-1 plan
50,000$59.50$2.98M23,898May 8, 2024May 10, 2024 ↗View →
CNM
CORE & MAIN, INC.
SALE10b5-1
10b5-1 plan
50,000$58.51$2.93M23,898Apr 8, 2024Apr 10, 2024 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
50,000——866,250Apr 8, 2024Apr 10, 2024 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Financial Officer
50,000——73,898Apr 8, 2024Apr 10, 2024 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Financial Officer
50,000——50,000Apr 8, 2024Apr 10, 2024 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
50,000——0Apr 8, 2024Apr 10, 2024 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
929$48.29$44.9K20,916Mar 11, 2024Jan 17, 2025 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
999$48.29$48.2K21,845Mar 11, 2024Jan 17, 2025 ↗View →
CNM
CORE & MAIN, INC.
PURCHASEGRANT
Stock grant
36,726——36,726Mar 7, 2024Mar 11, 2024 ↗View →
CNM
CORE & MAIN, INC.
PURCHASEGRANT
Stock grant
4,677——23,898Mar 7, 2024Mar 11, 2024 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
40,000——916,250Nov 15, 2023Nov 17, 2023 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Financial Officer
40,000——59,221Nov 15, 2023Nov 17, 2023 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Financial Officer
40,000——40,000Nov 15, 2023Nov 17, 2023 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
40,000——0Nov 15, 2023Nov 17, 2023 ↗View →
CNM
CORE & MAIN, INC.
SALE10b5-1
10b5-1 plan
40,000$34.01$1.36M19,221Nov 15, 2023Nov 17, 2023 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Financial Officer
20,000——39,221Nov 9, 2023Nov 13, 2023 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Financial Officer
20,000——20,000Nov 9, 2023Nov 13, 2023 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
20,000——0Nov 9, 2023Nov 13, 2023 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
20,000——956,250Nov 9, 2023Nov 13, 2023 ↗View →
CNM
CORE & MAIN, INC.
SALE10b5-1
10b5-1 plan
20,000$32.10$642.0K19,221Nov 9, 2023Nov 13, 2023 ↗View →
CNM
CORE & MAIN, INC.
SALE10b5-1
10b5-1 plan
20,000$30.02$600.3K19,221Oct 4, 2023Oct 6, 2023 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Financial Officer
20,000——39,221Oct 4, 2023Oct 6, 2023 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Financial Officer
20,000——20,000Oct 4, 2023Oct 6, 2023 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
20,000——976,250Oct 4, 2023Oct 6, 2023 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
20,000——0Oct 4, 2023Oct 6, 2023 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Financial Officer
39,397——59,221Sep 25, 2023Sep 27, 2023 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Financial Officer
603——19,824Sep 25, 2023Sep 27, 2023 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
39,397——996,250Sep 25, 2023Sep 27, 2023 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
39,397——0Sep 25, 2023Sep 27, 2023 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
603——0Sep 25, 2023Sep 27, 2023 ↗View →
CNM
CORE & MAIN, INC.
PURCHASE
Chief Financial Officer
39,397——39,397Sep 25, 2023Sep 27, 2023 ↗View →
CNM
CORE & MAIN, INC.
SALE10b5-1
10b5-1 plan
40,000$28.44$1.14M19,221Sep 25, 2023Sep 27, 2023 ↗View →
CNM
CORE & MAIN, INC.
SALE
Chief Financial Officer
1,054$21.45$22.6K22,844Mar 13, 2023Jan 17, 2025 ↗View →
CNM
CORE & MAIN, INC.
PURCHASEGRANT
Stock grant
9,669——19,221Mar 10, 2023Mar 14, 2023 ↗View →
CNM
CORE & MAIN, INC.
PURCHASEGRANT
Stock grant
79,560——79,560Mar 10, 2023Mar 14, 2023 ↗View →
CNM
CORE & MAIN, INC.
PURCHASEGRANT
Stock grant
69,714——69,714Mar 11, 2022Mar 15, 2022 ↗View →
CNM
CORE & MAIN, INC.
PURCHASEGRANT
Stock grant
9,552——9,552Mar 11, 2022Mar 15, 2022 ↗View →
Other insiders · CNM
Loading peer insiders…
About this filer
CIK 0001866738
ROLE
Chief Executive Officer
PRIMARY
CNM
COMPANIES
1
ACTIVE SINCE
Mar 2022
MARKETPEEL · /INSIDER/0001866738DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

The morning brief, before the bell.

One short email. Insider buys, congressional trades, and plain-English analysis.

Feedback