Builders FirstSource BLDR Institutional Ownership

Updated Oct 16, 2026

Builders FirstSource, Inc. (NYSE:BLDR) was held by 666 institutional investors that filed 13F reports for the quarter ended June 30, 2026.

• Together they owned 99.74% of the outstanding stock in Q2 2026, up from 96.44% a quarter earlier.
• Total shares held in Builders FirstSource rose 1.28% from Q1 2026, while the number of holders fell 13.17% from Q2 2025.
• Among the 666 holders of Builders FirstSource, 333 added to their positions, 259 reduced their stakes and 74 left their positions unchanged.
• The aggregate institutional position in Builders FirstSource was 107.32Mn shares at the end of Q2 2026, up 1.36Mn from the prior quarter and up 1.18Mn from a year earlier.
• As of June 30, 2026, the biggest holder of Builders FirstSource was BlackRock, Inc. with 7.83Mn shares, or 7.28% of shares outstanding.
• Among holders that already owned Builders FirstSource, the biggest buyers in Q2 2026 were Pictet Asset Management Holding SA (+2.42Mn shares), Capital International Investors (+964.19K shares), Invesco Ltd. (+742.04K shares), Ameriprise Financial Inc (+681.39K shares) and Atlas FRM LLC (+641K shares).
• Holders that trimmed the most shares of Builders FirstSource in Q2 2026 while keeping a position were Boston Partners (-1.57Mn shares), BlackRock, Inc. (-927.86K shares), Focus Partners Wealth (-781.21K shares), Marshall Wace, LLP (-636.58K shares) and Deutsche Bank AG (-515.45K shares).
• Builders FirstSource's 10 largest institutional shareholders as of Q2 2026 were BlackRock, Inc. (7.83Mn shares), Vanguard Capital Management LLC (6.85Mn shares), State Street Corp (4.84Mn shares), Vanguard Portfolio Management LLC (4.16Mn shares), Capital International Investors (3.91Mn shares), Pictet Asset Management Holding SA (3.8Mn shares), Wellington Management Group LLP (3.47Mn shares), Dimensional Fund Advisors LP (3.44Mn shares), Invesco Ltd. (3.35Mn shares) and Geode Capital Management, LLC (2.83Mn shares), per Business Quant data.