Builders FirstSource, Inc.
US ˙ NYSE ˙ US12008R1077

SecurityBLDR / Builders FirstSource, Inc.
InstitutionMacquarie Group Ltd
Latest Disclosed Ownership8,903 shares
Latest Disclosed Value $ 732,984
Macquarie Group Ltd reports 10.25% decrease in ownership of BLDR / Builders FirstSource, Inc.

On May 15, 2026 - Macquarie Group Ltd filed a 13F-HR form disclosing ownership of 8,903 shares of Builders FirstSource, Inc. (US:BLDR) valued at $732,984 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 9,920 shares of Builders FirstSource, Inc.. This represents a change in shares of -10.25% during the quarter. The current value of the position is $661,137 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)
2026-05-15 2026-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 8,903 -1,017 -10.25 733 -28.24 0.0034
2026-02-13 2025-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 9,920 -3,084 -23.72 1,021 -35.28 0.0045
2025-11-13 2025-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 13,004 -11,278 -46.45 1,577 -44.37 0.0018
2025-08-14 2025-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 24,282 -17,688 -42.14 2,833 -45.98 0.0035
2025-08-14 2025-03-31 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 41,970 2,580 6.55 5,244 5.13 0.0065
2025-05-15 2025-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 41,970 2,580 4,429 0.0036
2025-02-14 2024-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 39,390 -142,575 -78.35 4,988 -85.86 0.0061
2024-11-14 2024-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 181,965 -22,351 -10.94 35,275 24.74 0.0381
2024-08-09 2024-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 204,316 -16,990 -7.68 28,280 -38.73 0.0324
2024-05-14 2024-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 221,306 -17,003 -7.13 46,154 16.01 0.0523
2024-02-14 2023-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 238,309 115,617 94.23 39,783 160.48 0.0460
2023-11-14 2023-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 122,692 108,854 786.63 15,274 711.96 0.0192
2023-10-27 2023-06-30 13F/A-2 BUILDERS FIRSTSOURCE COM 12008R107 13,838 11,569 509.87 1,882 835.82 0.0022
2023-10-12 2023-06-30 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 13,838 11,569 1,882 0.0019
2023-08-14 2023-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 13,838 11,569 1,882 0.0019
2023-06-01 2023-03-31 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 2,269 116 5.39 201 43.57 0.0002
2023-05-15 2023-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 2,269 116 201 0.0002
2023-02-21 2022-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 2,153 -4,265 -66.45 140 -73.53 0.0002
2022-11-14 2022-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 6,418 -2,342 -26.74 529 12.55 0.0006
2022-08-17 2022-06-30 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 8,760 1,580 22.01 470 1.51 0.0005
2022-08-15 2022-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 8,760 1,580 470 0.0002
2022-05-16 2022-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 7,180 3,264 83.35 463 37.80 0.0004
2022-02-11 2021-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 3,916 -2,429 -38.28 336 2.44 0.0003
2021-11-12 2021-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 6,345 0 0.00 328 21.03 0.0003
2021-08-13 2021-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 6,345 114 1.83 271 -6.23 0.0002
2021-05-14 2021-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 6,231 -5,022 -44.63 289 -37.17 0.0004
2021-02-16 2020-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 11,253 0 0.00 460 25.34 0.0007
2020-11-13 2020-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 11,253 0 0.00 367 57.51 0.0006
2020-08-11 2020-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 11,253 -6,814 -37.72 233 5.43 0.0004
2020-05-15 2020-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 18,067 0 0.00 221 -51.85 0.0005
2020-03-18 2019-12-31 13F/A-2 BUILDERS FIRSTSOURCE COM 12008R107 18,067 7,267 67.29 459 106.76 0.0007
2020-02-28 2019-12-31 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 18,067 0 459 0.0007
2020-02-14 2019-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 18,067 7,267 459 576.0061
2019-11-14 2019-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 10,800 -7,800 -41.94 222 -29.30 0.0004
2019-11-06 2019-06-30 13F/A-2 BUILDERS FIRSTSOURCE COM 12008R107 18,600 18,600 0.00 314 0.00 0.0005
2019-09-24 2019-06-30 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 18,600 0 314 0.0005
2019-08-14 2019-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 18,600 18,600 314
2019-02-15 2018-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 0 -300 -100.00 0 -100.00
2018-11-15 2018-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 300 -18,600 -98.41 4 -98.84 0.0000
2019-03-21 2018-06-30 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 18,900 -10,200 -35.05 346 -40.03 0.0006
2018-08-14 2018-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 18,900 -10,200 346
2018-05-11 2018-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 29,100 5,400 22.78 577 11.82 0.0011
2018-02-14 2017-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 23,700 -1,600 -6.32 516 13.41 0.0009
2017-11-08 2017-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 25,300 25,300 455 0.0008
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.