DOSSIER · 13F-HR · Q1 2026
BLAIR WILLIAM & CO/IL
BLAIR WILLIAM & /IL's family office based in New York, NY — $34.9B in tracked AUM across 1,922 positions as of Q1 2026.
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BLAIR WILLIAM & /IL·New York, NY·Family Office
CIK 0000902367 · last filed Mar 31, 2026
AI Analysis · Q1 2026 · Q1 2026
Portfolio Overview
Blair William & Co. manages a substantial, diversified equity portfolio valued at approximately $37.57 billion as of September 30, 2025. The firm experienced a positive quarter, growing assets under management by 4.4% from the previous quarter's $36.00 billion. The portfolio is highly diversified, encompassing 1,844 individual holdings. Despite the large number of positions, the firm employs a core-satellite approach where a significant portion of the capital is concentra...
Quarter at a glance — Q1 2026
Position-change comparison pending.
No quarter-over-quarter changes available.
Top 10 holdings
By portfolio weight as of Q1 2026.
Filing history
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