Builders FirstSource, Inc.
DE ˙ DB ˙ US12008R1077
€ 64,22 ↓ -0.04 (-0.06%)
2026-06-03
PREÇO DA AÇÃO
SecurityDE:B1F / Builders FirstSource, Inc.
InstitutionSoapstone Management L.p.
Latest Disclosed Ownership15,000 shares
Latest Disclosed Value $ 1,234,950
Soapstone Management L.p. ownership in B1F / Builders FirstSource, Inc.

On May 15, 2026 - Soapstone Management L.p. filed a 13F-HR form disclosing ownership of 15,000 shares of Builders FirstSource, Inc. (DE:B1F) valued at $1,035,900 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,000 shares of Builders FirstSource, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $963,300 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 15,000 0 0.00 1,235 -20.03 0.8796
2026-02-17 2025-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 15,000 0 0.00 1,543 -15.13 1.1372
2025-11-14 2025-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 15,000 0 0.00 1,819 3.89 1.2346
2025-08-14 2025-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 15,000 0 0.00 1,750 -6.62 1.1617
2025-05-15 2025-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 15,000 0 0.00 1,874 -12.55 1.4641
2025-02-14 2024-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 15,000 -12,500 -45.45 2,144 -59.80 2.0145
2024-11-14 2024-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 27,500 -22,500 -45.00 5,331 -22.96 4.4320
2024-08-14 2024-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 50,000 0 0.00 6,920 -33.63 4.6173
2024-05-15 2024-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 50,000 0 0.00 10,428 24.92 5.8203
2024-02-14 2023-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 50,000 -10,000 -16.67 8,347 11.76 4.5650
2023-11-14 2023-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 60,000 -2,500 -4.00 7,469 -12.13 3.4538
2023-08-14 2023-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 62,500 -197,500 -75.96 8,500 -63.17 3.7958
2023-05-15 2023-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 260,000 -35,000 -11.86 23,083 20.60 10.3112
2023-01-25 2022-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 295,000 -105,000 -26.25 19,140 -18.79 8.0707
2022-11-14 2022-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 400,000 -57,500 -12.57 23,568 -4.07 9.1964
2022-08-15 2022-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 457,500 7,500 1.67 24,568 -15.41 10.4055
2022-05-06 2022-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 450,000 0 0.00 29,043 -24.70 13.2849
2022-02-14 2021-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 450,000 -420,300 -48.29 38,570 -14.34 17.7337
2021-11-15 2021-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 870,300 -54,700 -5.91 45,029 14.11 18.9169
2021-08-16 2021-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 925,000 250,000 37.04 39,461 26.07 15.8343
2021-05-17 2021-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 675,000 0 0.00 31,300 13.62 13.9244
2021-02-16 2020-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 675,000 -325,000 -32.50 27,547 -15.55 11.8565
2020-11-16 2020-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 1,000,000 -1,000,000 -50.00 32,620 -21.21 16.0175
2020-08-14 2020-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 2,000,000 150,000 8.11 41,400 82.98 23.8560
2020-05-15 2020-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 1,850,000 325,000 21.31 22,626 -41.61 19.4956
2020-02-14 2019-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 1,525,000 -925,000 -37.76 38,750 -23.13 24.6262
2019-11-14 2019-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 2,450,000 0 0.00 50,409 22.04 27.4560
2019-08-14 2019-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 2,450,000 28,870 1.19 41,307 27.89 22.4549
2019-05-15 2019-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 2,421,130 421,130 21.06 32,298 48.02 15.7617
2019-02-14 2018-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 2,000,000 125,000 6.67 21,820 -20.73 13.1192
2018-11-14 2018-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 1,875,000 200,000 11.94 27,525 -10.15 14.7300
2018-08-14 2018-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 1,675,000 394,394 30.80 30,636 20.58 15.6978
2018-05-15 2018-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 1,280,606 215,650 20.25 25,407 9.49 15.2587
2018-02-14 2017-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 1,064,956 1,064,956 23,205 16.3276
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.