Builders FirstSource, Inc.
DE ˙ DB ˙ US12008R1077
64,22 € ↓ -0,04 (-0,06%)
2026-06-03
AKTIENPREIS
SecurityDE:B1F / Builders FirstSource, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership97,070 shares
Latest Disclosed Value $ 9,988,106
Sei Investments Co reports 2.22% decrease in ownership of B1F / Builders FirstSource, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 97,070 shares of Builders FirstSource, Inc. (DE:B1F) valued at $8,460,621 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 99,278 shares of Builders FirstSource, Inc.. This represents a change in shares of -2.22% during the quarter. The current value of the position is $6,233,835 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)
2026-02-13 2025-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 97,070 -2,208 -2.22 9,988 -17.03 0.0099
2025-11-13 2025-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 99,278 -1,385 -1.38 12,038 2.50 0.0129
2025-08-14 2025-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 100,663 35,676 54.90 11,745 44.76 0.0136
2025-05-14 2025-03-31 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 64,987 12,606 24.07 8,114 8.36 0.0104
2025-05-13 2025-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 54,565 2,184 7,374 0.0080
2025-02-11 2024-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 52,381 10,338 24.59 7,487 -8.15 0.0096
2024-11-12 2024-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 42,043 5,439 14.86 8,151 60.83 0.0106
2024-08-13 2024-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 36,604 -51,445 -58.43 5,068 -72.40 0.0072
2024-05-07 2024-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 88,049 58,694 199.95 18,363 274.76 0.0269
2024-02-14 2023-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 29,355 -42,704 -59.26 4,900 -45.37 0.0079
2023-11-14 2023-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 72,059 -17,833 -19.84 8,971 -26.63 0.0161
2023-08-11 2023-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 89,892 -17,416 -16.23 12,225 28.33 0.0213
2023-05-12 2023-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 107,308 71,104 196.40 9,527 305.71 0.0177
2023-02-10 2022-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 36,204 -60,419 -62.53 2,349 -58.76 0.0052
2022-11-14 2022-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 96,623 -4,685 -4.62 5,693 5.21 0.0127
2022-08-15 2022-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 101,308 67,993 204.09 5,411 152.38 0.0117
2022-05-13 2022-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 33,315 -29,468 -46.94 2,144 -60.13 0.0043
2022-02-14 2021-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 62,783 57,143 1,013.17 5,378 1,754.48 0.0101
2021-11-12 2021-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 5,640 -60,144 -91.43 290 -89.67 0.0006
2021-08-06 2021-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 65,784 -10,931 -14.25 2,807 -18.40 0.0062
2021-05-12 2021-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 76,715 -68,857 -47.30 3,440 -42.10 0.0087
2021-02-08 2020-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 145,572 -78,814 -35.12 5,941 -18.82 0.0154
2020-12-04 2020-09-30 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 224,386 25,298 12.71 7,318 77.58 0.0212
2020-11-06 2020-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 229,411 30,323 7,482 18,014.9925
2020-08-17 2020-06-30 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 199,088 12,739 6.84 4,121 80.67 0.0128
2020-08-11 2020-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 136,363 -49,986 3,406 9,238.9563
2020-05-14 2020-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 186,349 27,623 17.40 2,281 -43.46 0.0084
2020-02-06 2019-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 158,726 115,653 268.50 4,034 356.85 0.0120
2019-11-12 2019-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 43,073 19,652 83.91 883 123.54 0.0023
2019-08-14 2019-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 23,421 -2,273 -8.85 395 15.16 0.0013
2019-05-15 2019-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 25,694 24,328 1,780.97 343 1,615.00 0.0012
2019-02-13 2018-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 1,366 -138,600 -99.02 20 -99.03 0.0001
2018-11-08 2018-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 139,966 -495,339 -77.97 2,055 -82.32 0.0074
2018-08-03 2018-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 635,305 528,913 497.14 11,621 450.50 0.0395
2018-05-11 2018-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 106,392 -12,500 -10.51 2,111 -18.53 0.0081
2018-02-08 2017-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 118,892 -18,830 -13.67 2,591 4.56 0.0090
2017-11-06 2017-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 137,722 -14,260 -9.38 2,478 6.40 0.0088
2017-07-31 2017-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 151,982 7,033 4.85 2,329 7.82 0.0093
2017-05-05 2017-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 144,949 -33,000 -18.54 2,160 10.66 0.0095
2017-02-02 2016-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 177,949 177,949 0.00 1,952 0.0095
2016-05-10 2016-03-31 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 0 -7,768 -100.00 0 -100.00
2016-02-03 2015-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 7,768 3,409 78.21 86 56.36 0.0005
2015-11-02 2015-09-30 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 4,359 4,359 55 0.0005
2015-10-30 2015-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 4,359 55
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.