Builders Firstsource Inc

Builders Firstsource Inc (BLDR) is held by 4 of the superinvestors tracked on Compounder, with a combined $222.0M in reported 13F value. The largest position belongs to Glenn Greenberg, where it makes up 4.8% of the portfolio.

Other notable holders by value include Chris Bloomstran (2.2% of its book), François Rochon (0.3% of its book) and Ray Dalio (0.0% of its book).

Over the latest quarter, 2 of the tracked filers opened a new position in BLDR, 1 added to existing ones, 1 trimmed, and 0 sold out entirely.

Holder counts and values reflect the most recent SEC Form 13F filings, through the quarter ended 2026-03-31. Source: SEC EDGAR. A 13F shows only long US-listed positions and can lag the real portfolio by up to 45 days, so this is disclosed long ownership, not a complete picture.