Builders FirstSource, Inc.
US ˙ NYSE ˙ US12008R1077

SecurityBLDR / Builders FirstSource, Inc.
InstitutionSignaturefd, Llc
Latest Disclosed Ownership948 shares
Latest Disclosed Value $ 78,049
Signaturefd, Llc reports 17.78% decrease in ownership of BLDR / Builders FirstSource, Inc.

On April 7, 2026 - Signaturefd, Llc filed a 13F-HR form disclosing ownership of 948 shares of Builders FirstSource, Inc. (US:BLDR) valued at $78,049 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 1,153 shares of Builders FirstSource, Inc.. This represents a change in shares of -17.78% during the quarter. The current value of the position is $69,811 USD.

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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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)
2026-04-07 2026-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 948 -205 -17.78 78 -33.90 0.0012
2026-01-20 2025-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 1,153 -130 -10.13 119 -23.87 0.0018
2025-10-21 2025-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 1,283 44 3.55 156 7.64 0.0025
2025-07-16 2025-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 1,239 -343 -21.68 145 -26.90 0.0025
2025-05-02 2025-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 1,582 197 14.22 198 -0.51 0.0037
2025-02-10 2024-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 1,385 -195 -12.34 198 -35.29 0.0038
2024-10-21 2024-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 1,580 404 34.35 306 88.89 0.0058
2024-07-29 2024-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 1,176 -589 -33.37 163 -55.98 0.0033
2024-05-03 2024-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 1,765 712 67.62 368 110.29 0.0078
2024-02-01 2023-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 1,053 132 14.33 176 53.51 0.0041
2023-11-03 2023-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 921 65 7.59 115 -1.72 0.0030
2023-08-01 2023-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 856 30 3.63 116 58.90 0.0030
2023-04-28 2023-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 826 101 13.93 73 55.32 0.0020
2023-01-30 2022-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 725 -435 -37.50 47 -30.88 0.0014
2022-11-08 2022-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 1,160 146 14.40 68 25.93 0.0023
2022-08-10 2022-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 1,014 518 104.44 54 68.75 0.0018
2022-05-02 2022-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 496 250 101.63 32 52.38 0.0010
2022-01-25 2021-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 246 -22,183 -98.90 21 -98.19 0.0006
2021-10-28 2021-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 22,429 -2,948 -11.62 1,160 7.11 0.0401
2021-07-26 2021-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 25,377 25,258 21,225.21 1,083 17,950.00 0.0432
2021-04-30 2021-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 119 119 6 0.0003
2020-07-30 2020-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 0 -423 -100.00 0 -100.00
2020-04-23 2020-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 423 303 252.50 5 66.67 0.0004
2020-02-05 2019-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 120 0 0.00 3 50.00 0.0002
2019-10-16 2019-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 120 0 0.00 2 0.00 0.0002
2019-07-31 2019-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 120 53 79.10 2 100.00 0.0002
2019-05-09 2019-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 67 0 0.00 1 0.00 0.0001
2019-02-13 2018-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 67 0 0.00 1 0.00 0.0001
2018-11-14 2018-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 67 0 0.00 1 0.00 0.0001
2018-08-14 2018-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 67 0 0.00 1 0.00 0.0001
2018-05-08 2018-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 67 67 1 0.0001
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.