Builders FirstSource, Inc.
US ˙ NYSE ˙ US12008R1077

SecurityBLDR / Builders FirstSource, Inc.
InstitutionWhittier Trust Co
Latest Disclosed Ownership82,883 shares
Latest Disclosed Value $ 6,801,379
Whittier Trust Co reports 25.11% decrease in ownership of BLDR / Builders FirstSource, Inc.

On April 28, 2026 - Whittier Trust Co filed a 13F-HR form disclosing ownership of 82,883 shares of Builders FirstSource, Inc. (US:BLDR) valued at $6,823,757 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 110,680 shares of Builders FirstSource, Inc.. This represents a change in shares of -25.11% during the quarter. The current value of the position is $6,154,892 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)
2026-04-28 2026-03-31 13F BUILDERS FIRST common 12008R107 82,883 -27,797 -25.11 6,801 -44.77 0.0402
2026-01-26 2025-12-31 13F BUILDERS FIRST common 12008R107 110,680 -427 -0.38 12,314 -13.78 0.1334
2025-10-31 2025-09-30 13F BUILDERS FIRSTSOURCE common 12008R107 111,107 1,758 1.61 14,283 11.94 0.1626
2025-07-30 2025-06-30 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 109,349 2,521 2.36 12,760 -4.40 0.1539
2025-05-02 2025-03-31 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 106,828 2,075 1.98 13,347 -10.86 0.1859
2025-02-11 2024-12-31 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 104,753 -11,877 -10.18 14,972 -33.78 0.1973
2024-10-21 2024-09-30 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 116,630 4,796 4.29 22,610 46.07 0.3026
2024-07-29 2024-06-30 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 111,834 -3,152 -2.74 15,479 -35.45 0.2196
2024-05-02 2024-03-31 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 114,986 4,539 4.11 23,980 30.06 0.3496
2024-01-11 2023-12-31 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 110,447 2,879 2.68 18,438 37.68 0.2989
2023-10-27 2023-09-30 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 107,568 2,492 2.37 13,391 -6.29 0.2380
2023-07-24 2023-06-30 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 105,076 -14,702 -12.27 14,290 34.39 0.2484
2023-04-21 2023-03-31 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 119,778 1,787 1.51 10,634 38.90 0.1936
2023-01-25 2022-12-31 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 117,991 3,445 3.01 7,655 13.42 0.1489
2022-10-21 2022-09-30 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 114,546 5,055 4.62 6,749 14.78 0.1414
2022-07-28 2022-06-30 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 109,491 1,642 1.52 5,880 -15.52 0.1188
2022-04-29 2022-03-31 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 107,849 107,580 39,992.57 6,960 30,160.87 0.1174
2022-01-19 2021-12-31 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 269 0 0.00 23 64.29 0.0004
2021-11-01 2021-09-30 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 269 0 0.00 14 27.27 0.0003
2021-07-29 2021-06-30 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 269 0 0.00 11 -8.33 0.0002
2021-04-26 2021-03-31 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 269 0 0.00 12 9.09 0.0002
2021-01-29 2020-12-31 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 269 0 0.00 11 22.22 0.0002
2020-10-30 2020-09-30 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 269 0 0.00 9 50.00 0.0002
2020-07-10 2020-06-30 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 269 0 0.00 6 100.00 0.0002
2020-04-27 2020-03-31 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 269 0 0.00 3 -57.14 0.0001
2020-01-31 2019-12-31 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 269 0 0.00 7 16.67 0.0002
2019-10-18 2019-09-30 13F BUILDERS FIRSTSOURCE INC COM US SMALL-CAP EQUITIES 12008R107 269 269 6 0.0002
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.