Builders FirstSource, Inc.
US ˙ NYSE ˙ US12008R1077

SecurityBLDR / Builders FirstSource, Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership31,126 shares
Latest Disclosed Value $ 2,562,524
Advisor Group Holdings, Inc. ownership in BLDR / Builders FirstSource, Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 31,126 shares of Builders FirstSource, Inc. (US:BLDR) valued at $2,562,604 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 20,542 shares of Builders FirstSource, Inc.. This represents a change in shares of 51.52% during the quarter. The current value of the position is $2,311,417 USD.

Advisor Group Holdings, Inc. has a history of taking positions in derivatives of the underlying security (BLDR) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

BLDR / Builders FirstSource, Inc. Historical Put/Call Ratio
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 31,126 10,584 51.52 2,563 21.25 0.0022
2026-02-17 2025-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 20,542 -55,573 -73.01 2,113 -77.59 0.0031
2025-11-14 2025-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 76,115 -11,044 -12.67 9,428 -11.37 0.0132
2025-09-04 2025-06-30 13F/A-1 UILDERS FIRSTSOURCE COM 12008R107 87,159 60,472 226.60 10,639 219.08 0.0189
2025-08-13 2025-06-30 13F UILDERS FIRSTSOURCE COM 12008R107 82,795 56,108 10,587 0.0122
2025-05-12 2025-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 26,687 -8,302 -23.73 3,334 -33.32 0.0074
2025-06-06 2024-12-31 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 34,989 -1,171 -3.24 5,001 -28.66 0.0112
2025-02-07 2024-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 36,258 98 6,134 0.0156
2024-11-13 2024-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 36,160 -13 -0.04 7,010 40.01 0.0158
2024-08-13 2024-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 36,173 -11,087 -23.46 5,007 -49.21 0.0118
2024-05-10 2024-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 47,260 -96,802 -67.19 9,856 -59.02 0.0220
2024-02-12 2023-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 144,062 -30,143 -17.30 24,050 10.90 0.0421
2023-11-13 2023-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 174,205 126,214 263.00 21,687 232.35 0.0320
2023-08-21 2023-06-30 13F/A-1 BUILDERS FIRSTSOURCE COM 12008R107 47,991 -12,087 -20.12 6,525 22.37 0.0117
2023-08-10 2023-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 48,936 -11,142 6,524 0.0018
2023-05-12 2023-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 60,078 -9,452 -13.59 5,333 18.25 0.0100
2023-02-10 2022-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 69,530 -34,564 -33.20 4,510 -26.47 0.0091
2022-11-14 2022-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 104,094 17,456 20.15 6,132 31.19 0.0140
2022-08-10 2022-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 86,638 20,960 31.91 4,674 14.31 0.0103
2022-05-04 2022-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 65,678 1,665 2.60 4,089 -25.36 0.0079
2022-02-03 2021-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 64,013 40,264 169.54 5,478 344.64 0.0104
2021-11-05 2021-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 23,749 10,557 80.03 1,232 118.83 0.0026
2021-08-02 2021-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 13,192 1,634 14.14 563 4.45 0.0012
2021-05-13 2021-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 11,558 3,653 46.21 539 67.39 0.0013
2021-02-10 2020-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 7,905 325 4.29 322 31.43 0.0009
2020-11-12 2020-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 7,580 2,795 58.41 245 145.00 0.0007
2020-08-14 2020-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 4,785 1,543 47.59 100 156.41 0.0003
2020-05-18 2020-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 3,242 3,242 39 0.0002
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-08-10 2022-06-30 13F BUILDERS FIRSTSOURCE INC CALL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-04 2022-03-31 13F BUILDERS FIRSTSOURCE INC CALL COM Call 14 3 n/a n/a n/a
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.