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BLDR · Builders FirstSource, Inc. · Holdings

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$53.55 -2.67 (-4.75%) At close · Oct 7
Market Cap
$6.19B
Shares
107.60M
Volume · Oct 7 2.36M Avg daily vol (3M) 2.66M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 674
Total Value: $9,901,164,277
Total Shares: 110,708,302
Showing 1–100 of 704 holdings by value · page 1 of 8

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 677 13F filers
Top Holder
7.1%
Sep 2023 → Jun 2026 · range 7.1% – 13.1%
of institutional value
Top 5
24.9%
Sep 2023 → Jun 2026 · range 24.9% – 38.4%
of institutional value
Top 10
40.2%
Sep 2023 → Jun 2026 · range 39.3% – 49.1%
of institutional value
HHI
225
Sep 2023 → Jun 2026 · range 225 – 407
Broadly held
Showing 100 of 704
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1316835 CUSIP 12008R107 13F (30d) 29 filings 17 filers Visit website Investor relations