Core & Main, Inc.
US ˙ NYSE ˙ US21874C1027

SecurityCNM / Core & Main, Inc.
InstitutionWalleye Capital LLC
Latest Disclosed Ownership127,321 shares
Latest Disclosed Value $ 6,289,657
Walleye Capital LLC ownership in CNM / Core & Main, Inc.

On May 13, 2026 - Walleye Capital LLC filed a 13F-HR/A form disclosing ownership of 127,321 shares of Core & Main, Inc. (US:CNM) valued at $6,289,657 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 0 shares of Core & Main, Inc.. The current value of the position is $6,635,971 USD.

Walleye Capital LLC has a history of taking positions in derivatives of the underlying security (CNM) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

CNM / Core & Main, Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F/A-1 CORE & MAIN CL A 21874C102 127,321 127,321 6,290 0.0262
2026-05-08 2026-03-31 13F CORE & MAIN CL A 21874C102 127,321 127,321 6,290 0.0261
2026-02-13 2025-12-31 13F CORE & MAIN CL A 21874C102 0 -191,560 -100.00 0 -100.00
2025-11-14 2025-09-30 13F CORE & MAIN CL A 21874C102 191,560 -241,889 -55.81 10,312 -60.58 0.0387
2025-08-13 2025-06-30 13F CORE & MAIN CL A 21874C102 433,449 23,917 5.84 26,159 32.22 0.1016
2025-05-14 2025-03-31 13F CORE & MAIN CL A 21874C102 409,532 125,082 43.97 19,784 36.62 0.0893
2025-02-13 2024-12-31 13F CORE & MAIN CL A 21874C102 284,450 284,450 14,481 0.0354
2024-11-14 2024-09-30 13F CORE & MAIN CL A 21874C102 0 -5,554 -100.00 0 -100.00
2024-08-14 2024-06-30 13F CORE & MAIN CL A 21874C102 5,554 5,343 2,532.23 272 2,158.33 0.0005
2024-05-15 2024-03-31 13F CORE & MAIN CL A 21874C102 211 211 12 0.0000
2023-02-14 2022-12-31 13F CORE & MAIN CL A 21874C102 0 -42,793 -100.00 0 -100.00
2022-11-14 2022-09-30 13F CORE & MAIN CL A 21874C102 42,793 42,793 973 0.0186
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-13 2026-03-31 13F/A CORE & MAIN CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-05-08 2026-03-31 13F CORE & MAIN CL A Call 0 0 n/a n/a n/a
2026-02-13 2025-12-31 13F CORE & MAIN CL A Call 15,800 5,166.67 821 5,031.25 n/a n/a n/a
2025-11-14 2025-09-30 13F CORE & MAIN CL A Call 300 16 n/a n/a n/a
2025-08-13 2025-06-30 13F CORE & MAIN CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-14 2025-03-31 13F CORE & MAIN CL A Call 13,300 -52.50 643 -54.95 n/a n/a n/a
2025-02-13 2024-12-31 13F CORE & MAIN CL A Call 28,000 268.42 1,425 322.85 n/a n/a n/a
2024-11-14 2024-09-30 13F CORE & MAIN CL A Call 7,600 -78.89 337 -80.86 n/a n/a n/a
2024-08-14 2024-06-30 13F CORE & MAIN CL A Call 36,000 650.00 1,762 542.70 n/a n/a n/a
2024-05-15 2024-03-31 13F CORE & MAIN CL A Call 4,800 275 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-13 2026-03-31 13F/A CORE & MAIN CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2026-05-08 2026-03-31 13F CORE & MAIN CL A Put 0 0 n/a n/a n/a
2026-02-13 2025-12-31 13F CORE & MAIN CL A Put 16,300 847 n/a n/a n/a
2025-05-14 2025-03-31 13F CORE & MAIN CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-02-13 2024-12-31 13F CORE & MAIN CL A Put 14,200 7,000.00 723 8,925.00 n/a n/a n/a
2024-11-14 2024-09-30 13F CORE & MAIN CL A Put 200 -99.10 9 -99.26 n/a n/a n/a
2024-08-14 2024-06-30 13F CORE & MAIN CL A Put 22,100 1,082 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.