빌더스 FirstSource, Inc.
US ˙ NYSE ˙ US12008R1077

SecurityBLDR / Builders FirstSource, Inc.
InstitutionInterval Partners, LP
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Interval Partners, LP ownership in BLDR / Builders FirstSource, Inc.

On February 17, 2026 - Interval Partners, LP filed a 13F-HR form disclosing ownership of 0 shares of Builders FirstSource, Inc. (US:BLDR) valued at $0 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 22,616 shares of Builders FirstSource, Inc.. The current value of the position is $0 USD.

Interval Partners, LP 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 and put 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.

Upgrade to unlock premium data and export to Excel .

Institutional Put/Call Ratios
(Premium Subscription Required)

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)
2026-02-17 2025-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 0 -100.00 0
2025-11-14 2025-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 22,616 -4,535 -16.70 2,742 -13.45 0.0448
2025-08-14 2025-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 27,151 -18,073 -39.96 3,168 -43.93 0.0537
2025-05-15 2025-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 45,224 45,224 5,650 0.1185
2024-11-14 2024-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 0 -95,172 -100.00 0 -100.00
2024-08-14 2024-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 95,172 95,172 13,173 0.2871
2024-05-15 2024-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 0 -315,584 -100.00 0 -100.00
2024-02-14 2023-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 315,584 315,584 52,684 1.5034
2023-11-14 2023-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 0 -152,089 -100.00 0 -100.00
2023-08-14 2023-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 152,089 122,089 406.96 20,684 676.72 0.7466
2023-05-15 2023-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 30,000 30,000 2,663 0.1056
2022-11-14 2022-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 0 -359,364 -100.00 0 -100.00
2022-08-15 2022-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 359,364 85,595 31.27 19,298 9.22 0.9978
2022-05-16 2022-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 273,769 -150,045 -35.40 17,669 -51.36 0.8599
2022-02-14 2021-12-31 13F BUILDERS FIRSTSOURCE COM 12008R107 423,814 -350,509 -45.27 36,325 -9.33 1.5517
2021-11-15 2021-09-30 13F BUILDERS FIRSTSOURCE COM 12008R107 774,323 -571,977 -42.49 40,063 -30.24 1.6209
2021-08-16 2021-06-30 13F BUILDERS FIRSTSOURCE COM 12008R107 1,346,300 662,967 97.02 57,433 81.26 2.3710
2021-05-17 2021-03-31 13F BUILDERS FIRSTSOURCE COM 12008R107 683,333 683,333 31,686 1.2236
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
(%)
2025-08-14 2025-06-30 13F BUILDERS FIRSTSOURCE COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-15 2025-03-31 13F BUILDERS FIRSTSOURCE COM Call 21,300 2,661 n/a n/a n/a
2024-02-14 2023-12-31 13F BUILDERS FIRSTSOURCE COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-11-14 2023-09-30 13F BUILDERS FIRSTSOURCE COM Call 229 2,851 n/a n/a n/a
2022-11-14 2022-09-30 13F BUILDERS FIRSTSOURCE COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-08-15 2022-06-30 13F BUILDERS FIRSTSOURCE COM Call 100,000 1.01 5,370 -15.95 n/a n/a n/a
2022-05-16 2022-03-31 13F BUILDERS FIRSTSOURCE COM Call 99,000 -29.29 6,389 -46.75 n/a n/a n/a
2022-02-14 2021-12-31 13F BUILDERS FIRSTSOURCE COM Call 140,000 11,999 n/a n/a n/a
2021-11-15 2021-09-30 13F BUILDERS FIRSTSOURCE COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-08-16 2021-06-30 13F BUILDERS FIRSTSOURCE COM Call 654,000 336.00 27,900 301.09 n/a n/a n/a
2021-05-17 2021-03-31 13F BUILDERS FIRSTSOURCE COM Call 150,000 6,956 n/a n/a n/a
Disclosed Put 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
(%)
2024-08-14 2024-06-30 13F BUILDERS FIRSTSOURCE COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F BUILDERS FIRSTSOURCE COM Put 100 -50.00 2,086 -37.54 n/a n/a n/a
2024-02-14 2023-12-31 13F BUILDERS FIRSTSOURCE COM Put 200 0.00 3,339 34.11 n/a n/a n/a
2023-11-14 2023-09-30 13F BUILDERS FIRSTSOURCE COM Put 200 2,490 n/a n/a n/a
2021-11-15 2021-09-30 13F BUILDERS FIRSTSOURCE COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-08-16 2021-06-30 13F BUILDERS FIRSTSOURCE COM Put 50,000 2,133 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.