Builders FirstSource, Inc.
US ˙ NYSE ˙ US12008R1077

SecurityBLDR / Builders FirstSource, Inc.
InstitutionWalleye Capital LLC
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Walleye Capital LLC ownership in BLDR / Builders FirstSource, Inc.

On May 13, 2026 - Walleye Capital LLC filed a 13F-HR/A form disclosing ownership of 0 shares of Builders FirstSource, Inc. (US:BLDR) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 15,202 shares of Builders FirstSource, Inc.. This represents a change in shares of -100.00% during the quarter. The current value of the position is $0 USD.

Walleye Capital LLC has a history of taking positions in derivatives of the underlying security (BLDR) in the form of stock options. The firm currently holds call options representing 13,200 of underlying shares valued at $1,086,756 USD and put options representing 13,500 of underlying shares valued at $1,111,455 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.

BLDR / Builders FirstSource, 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 BUILDERS FIRSTSOURCE COM 12008R107 0 -15,202 -100.00 0 -100.00
2026-05-08 2026-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 0 -15,202 0
2026-02-13 2025-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 15,202 4,236 38.63 1,564 17.68 0.0048
2025-11-14 2025-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 10,966 10,528 2,403.65 1,330 2,505.88 0.0050
2025-08-13 2025-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 438 -17 -3.74 51 -8.93 0.0002
2025-05-14 2025-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 455 -24,778 -98.20 57 -98.45 0.0003
2025-02-13 2024-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 25,233 -31,731 -55.70 3,607 -67.35 0.0088
2024-11-14 2024-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 56,964 27,814 95.42 11,043 173.75 0.0230
2024-08-14 2024-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 29,150 -37,147 -56.03 4,035 -70.82 0.0072
2024-05-15 2024-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 66,297 -23,118 -25.85 13,826 -7.37 0.0246
2024-02-14 2023-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 89,415 89,415 14,927 0.0316
2023-08-14 2023-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 0 -16,275 -100.00 0 -100.00
2023-05-15 2023-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 16,275 16,275 1,445 0.0216
2023-02-14 2022-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 0 -7,568 -100.00 0 -100.00
2022-11-14 2022-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 7,568 7,568 446 0.0085
2022-08-19 2022-06-30 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 0 -21,083 -100.00 0 -100.00
2022-08-08 2022-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 0 -21,083 0
2022-05-27 2022-03-31 13F/A-01 BUILDERS FIRSTSOURCE COM 12008R107 21,083 18,321 663.32 1,361 474.26 0.0364
2022-05-16 2022-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 21,083 18,321 1,361 0.0277
2022-05-27 2021-12-31 13F/A-01 BUILDERS FIRSTSOURCE COM 12008R107 2,762 -4,446 -61.68 237 -36.46 0.0074
2022-03-03 2021-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 2,762 -4,446 237 0.0059
2021-11-15 2021-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 7,208 7,208 373 0.0106
2019-08-14 2019-03-31 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 0 -20,292 -100.00 0 -100.00
2018-11-14 2018-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 20,292 20,292 298 0.1391
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 BUILDERS FIRSTSOURCE COM Call 13,200 -72.84 1,087 -78.28 n/a n/a n/a
2026-05-08 2026-03-31 13F BUILDERS FIRSTSOURCE COM Call 13,200 1,087 n/a n/a n/a
2026-02-13 2025-12-31 13F BUILDERS FIRSTSOURCE COM Call 48,600 50.46 5,000 27.68 n/a n/a n/a
2025-11-14 2025-09-30 13F BUILDERS FIRSTSOURCE COM Call 32,300 -22.17 3,916 -19.12 n/a n/a n/a
2025-08-13 2025-06-30 13F BUILDERS FIRSTSOURCE COM Call 41,500 75.85 4,843 64.25 n/a n/a n/a
2025-05-14 2025-03-31 13F BUILDERS FIRSTSOURCE COM Call 23,600 3.51 2,949 -9.52 n/a n/a n/a
2025-02-13 2024-12-31 13F BUILDERS FIRSTSOURCE COM Call 22,800 -41.09 3,259 -56.57 n/a n/a n/a
2024-11-14 2024-09-30 13F BUILDERS FIRSTSOURCE COM Call 38,700 135.98 7,502 230.63 n/a n/a n/a
2024-08-14 2024-06-30 13F BUILDERS FIRSTSOURCE COM Call 16,400 -20.77 2,270 -47.43 n/a n/a n/a
2024-05-15 2024-03-31 13F BUILDERS FIRSTSOURCE COM Call 20,700 23.95 4,317 54.86 n/a n/a n/a
2024-02-14 2023-12-31 13F BUILDERS FIRSTSOURCE COM Call 16,700 8.44 2,788 45.38 n/a n/a n/a
2023-11-21 2023-09-30 13F/A BUILDERS FIRSTSOURCE COM Call 15,400 -28.70 1,917 -34.73 n/a n/a n/a
2023-11-14 2023-09-30 13F BUILDERS FIRSTSOURCE COM Call 15,400 1,917 n/a n/a n/a
2023-08-14 2023-06-30 13F BUILDERS FIRSTSOURCE COM Call 21,600 2,938 n/a n/a n/a
2023-02-14 2022-12-31 13F BUILDERS FIRSTSOURCE COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-14 2022-09-30 13F BUILDERS FIRSTSOURCE COM Call 300 18 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 BUILDERS FIRSTSOURCE COM Put 13,500 -65.12 1,111 -72.09 n/a n/a n/a
2026-05-08 2026-03-31 13F BUILDERS FIRSTSOURCE COM Put 13,500 1,111 n/a n/a n/a
2026-02-13 2025-12-31 13F BUILDERS FIRSTSOURCE COM Put 38,700 1.04 3,982 -14.26 n/a n/a n/a
2025-11-14 2025-09-30 13F BUILDERS FIRSTSOURCE COM Put 38,300 -30.74 4,644 -28.04 n/a n/a n/a
2025-08-13 2025-06-30 13F BUILDERS FIRSTSOURCE COM Put 55,300 412.04 6,453 378.28 n/a n/a n/a
2025-05-14 2025-03-31 13F BUILDERS FIRSTSOURCE COM Put 10,800 -86.80 1,349 -88.46 n/a n/a n/a
2025-02-13 2024-12-31 13F BUILDERS FIRSTSOURCE COM Put 81,800 3.41 11,692 -23.76 n/a n/a n/a
2024-11-14 2024-09-30 13F BUILDERS FIRSTSOURCE COM Put 79,100 22.45 15,334 71.50 n/a n/a n/a
2024-08-14 2024-06-30 13F BUILDERS FIRSTSOURCE COM Put 64,600 -26.17 8,941 -51.00 n/a n/a n/a
2024-05-15 2024-03-31 13F BUILDERS FIRSTSOURCE COM Put 87,500 290.62 18,248 388.04 n/a n/a n/a
2024-02-14 2023-12-31 13F BUILDERS FIRSTSOURCE COM Put 22,400 2.28 3,739 37.16 n/a n/a n/a
2023-11-21 2023-09-30 13F/A BUILDERS FIRSTSOURCE COM Put 21,900 16.49 2,726 6.65 n/a n/a n/a
2023-11-14 2023-09-30 13F BUILDERS FIRSTSOURCE COM Put 21,900 2,726 n/a n/a n/a
2023-08-14 2023-06-30 13F BUILDERS FIRSTSOURCE COM Put 18,800 2,557 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.