Core & Main, Inc.
US ˙ NYSE ˙ US21874C1027

SecurityCNM / Core & Main, Inc.
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership67,449 shares
Latest Disclosed Value $ 3,331,981
Citadel Advisors Llc ownership in CNM / Core & Main, Inc.

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 67,449 shares of Core & Main, Inc. (US:CNM) valued at $3,331,981 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 302,457 shares of Core & Main, Inc.. This represents a change in shares of -77.70% during the quarter. The current value of the position is $3,505,325 USD.

Citadel Advisors 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 25,700 of underlying shares valued at $1,269,580 USD and put options representing 26,400 of underlying shares valued at $1,304,160 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)
2026-05-15 2026-03-31 13F CORE & MAIN CL A 21874C102 67,449 -235,008 -77.70 3,332 -78.81 0.0005
2026-02-17 2025-12-31 13F CORE & MAIN CL A 21874C102 302,457 302,457 15,719 0.0024
2025-11-14 2025-09-30 13F CORE & MAIN CL A 21874C102 0 -325,283 -100.00 0 -100.00
2025-08-14 2025-06-30 13F CORE & MAIN CL A 21874C102 325,283 322,273 10,706.74 19,631 13,437.93 0.0034
2025-05-15 2025-03-31 13F CORE & MAIN CL A 21874C102 3,010 -283,664 -98.95 145 -99.01 0.0000
2025-02-14 2024-12-31 13F CORE & MAIN CL A 21874C102 286,674 71,093 32.98 14,595 52.48 0.0025
2024-11-14 2024-09-30 13F CORE & MAIN CL A 21874C102 215,581 212,992 8,226.81 9,572 7,496.03 0.0018
2024-08-14 2024-06-30 13F CORE & MAIN CL A 21874C102 2,589 2,484 2,365.71 127 2,000.00 0.0000
2024-05-15 2024-03-31 13F CORE & MAIN CL A 21874C102 105 -66,104 -99.84 6 -99.78 0.0000
2024-02-14 2023-12-31 13F CORE & MAIN CL A 21874C102 66,209 -1,190,737 -94.73 2,676 -92.62 0.0005
2023-11-14 2023-09-30 13F CORE & MAIN CL A 21874C102 1,256,946 691,002 122.10 36,263 104.45 0.0078
2023-08-14 2023-06-30 13F CORE & MAIN CL A 21874C102 565,944 332,724 142.67 17,737 229.24 0.0037
2023-05-15 2023-03-31 13F CORE & MAIN CL A 21874C102 233,220 30,180 14.86 5,387 37.42 0.0012
2023-02-14 2022-12-31 13F CORE & MAIN CL A 21874C102 203,040 -387,685 -65.63 3,921 -70.82 0.0009
2022-11-14 2022-09-30 13F CORE & MAIN CL A 21874C102 590,725 524,140 787.17 13,433 804.58 0.0031
2022-08-15 2022-06-30 13F CORE & MAIN CL A 21874C102 66,585 -717,271 -91.51 1,485 -92.17 0.0004
2022-05-16 2022-03-31 13F CORE & MAIN CL A 21874C102 783,856 661,790 542.16 18,962 412.07 0.0039
2022-02-14 2021-12-31 13F CORE & MAIN CL A 21874C102 122,066 -262,847 -68.29 3,703 -63.30 0.0008
2021-11-15 2021-09-30 13F CORE & MAIN Cmn 21874C102 384,913 384,913 10,089 0.0021
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
(%)
2026-05-15 2026-03-31 13F CORE & MAIN CL A Call 25,700 -74.43 1,270 -75.70 n/a n/a n/a
2026-02-17 2025-12-31 13F CORE & MAIN CL A Call 100,500 -36.71 5,223 -38.91 n/a n/a n/a
2025-11-14 2025-09-30 13F CORE & MAIN CL A Call 158,800 10.97 8,548 -1.02 n/a n/a n/a
2025-08-14 2025-06-30 13F CORE & MAIN CL A Call 143,100 76.67 8,636 120.70 n/a n/a n/a
2025-05-15 2025-03-31 13F CORE & MAIN CL A Call 81,000 215.18 3,913 199.16 n/a n/a n/a
2025-02-14 2024-12-31 13F CORE & MAIN CL A Call 25,700 3.63 1,308 18.80 n/a n/a n/a
2024-11-14 2024-09-30 13F CORE & MAIN CL A Call 24,800 -78.38 1,101 -80.38 n/a n/a n/a
2024-08-14 2024-06-30 13F CORE & MAIN CL A Call 114,700 -22.03 5,613 -33.35 n/a n/a n/a
2024-05-15 2024-03-31 13F CORE & MAIN CL A Call 147,100 745.40 8,421 1,097.87 n/a n/a n/a
2024-02-14 2023-12-31 13F CORE & MAIN CL A Call 17,400 125.97 703 216.67 n/a n/a n/a
2023-11-14 2023-09-30 13F CORE & MAIN CL A Call 7,700 -80.80 222 -82.32 n/a n/a n/a
2023-08-14 2023-06-30 13F CORE & MAIN CL A Call 40,100 44.24 1,257 95.64 n/a n/a n/a
2023-05-15 2023-03-31 13F CORE & MAIN CL A Call 27,800 969.23 642 1,184.00 n/a n/a n/a
2023-02-14 2022-12-31 13F CORE & MAIN CL A Call 2,600 -74.26 50 -78.26 n/a n/a n/a
2022-11-14 2022-09-30 13F CORE & MAIN CL A Call 10,100 -59.76 230 -58.93 n/a n/a n/a
2022-08-15 2022-06-30 13F CORE & MAIN CL A Call 25,100 -0.40 560 -8.20 n/a n/a n/a
2022-05-16 2022-03-31 13F CORE & MAIN CL A Call 25,200 100.00 610 59.69 n/a n/a n/a
2022-02-14 2021-12-31 13F CORE & MAIN CL A Call 12,600 -36.04 382 -25.97 n/a n/a n/a
2021-11-15 2021-09-30 13F CORE & MAIN Cmn Call 19,700 516 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
(%)
2026-05-15 2026-03-31 13F CORE & MAIN CL A Put 26,400 -9.59 1,304 -14.04 n/a n/a n/a
2026-02-17 2025-12-31 13F CORE & MAIN CL A Put 29,200 -42.18 1,518 -44.19 n/a n/a n/a
2025-11-14 2025-09-30 13F CORE & MAIN CL A Put 50,500 179.01 2,718 148.90 n/a n/a n/a
2025-08-14 2025-06-30 13F CORE & MAIN CL A Put 18,100 -88.54 1,092 -85.69 n/a n/a n/a
2025-05-15 2025-03-31 13F CORE & MAIN CL A Put 158,000 0.51 7,633 -4.64 n/a n/a n/a
2025-02-14 2024-12-31 13F CORE & MAIN CL A Put 157,200 23.88 8,003 42.05 n/a n/a n/a
2024-11-14 2024-09-30 13F CORE & MAIN CL A Put 126,900 -35.16 5,634 -41.17 n/a n/a n/a
2024-08-14 2024-06-30 13F CORE & MAIN CL A Put 195,700 -8.21 9,578 -21.53 n/a n/a n/a
2024-05-15 2024-03-31 13F CORE & MAIN CL A Put 213,200 -7.51 12,206 31.04 n/a n/a n/a
2024-02-14 2023-12-31 13F CORE & MAIN CL A Put 230,500 889.27 9,315 1,286.01 n/a n/a n/a
2023-11-14 2023-09-30 13F CORE & MAIN CL A Put 23,300 77.86 672 63.90 n/a n/a n/a
2023-08-14 2023-06-30 13F CORE & MAIN CL A Put 13,100 107.94 411 182.76 n/a n/a n/a
2023-05-15 2023-03-31 13F CORE & MAIN CL A Put 6,300 133.33 146 178.85 n/a n/a n/a
2023-02-14 2022-12-31 13F CORE & MAIN CL A Put 2,700 52 n/a n/a n/a
2022-08-15 2022-06-30 13F CORE & MAIN CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-16 2022-03-31 13F CORE & MAIN CL A Put 11,600 41.46 281 12.85 n/a n/a n/a
2022-02-14 2021-12-31 13F CORE & MAIN CL A Put 8,200 -23.36 249 -11.07 n/a n/a n/a
2021-11-15 2021-09-30 13F CORE & MAIN Cmn Put 10,700 280 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.