Ownership history in BLAIR WILLIAM & CO/IL Β· 65 quarters on record
This page tracks every 13F SEC filing in which BLAIR WILLIAM & CO/IL reported a position in ISHARES TR S&P 500 INDEX ETF (IVV). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price β sourced directly from SEC EDGAR 13F filings.
π BLAIR WILLIAM & CO/IL outperformed the S&P 500 by +0.0% annually on this IVV position. Timing score: 61% (39/64 decisions correct). Average cost basis: $358.73. Maximum drawdown during holding period: β23.9%.
β‘οΈ Roughly in line with S&P 500 (Β±1% alpha range).
64 quarters analyzed
β
Decent timing β more right than wrong on entries and exits.
39 of 64 add/trim decisions correct
Best entry: $87.84 (2011 Q3) Β· Worst: $683.12 (2025 Q4)
πͺ Held through 1 major drawdown (>20%). Strong conviction under pressure.
44 adds Β· 21 trims. Bought during 10 of 14 down-price quarters. π More buys than sells across the holding period.
βοΈ Portfolio weight has remained relatively stable β conviction maintained.
Currently 0.9% of portfolio
β Based on quarterly 13F SEC filings and end-of-quarter closing prices. Timing score = accuracy of add/trim decisions vs next-quarter price direction. Alpha = mean quarterly excess return Γ 4 (annualised). Not investment advice.
As of 2025 Q4 β sorted by position size