SEC 13F Intelligence

William Blair Investment Management, LLC / TSM

William Blair Investment Management, LLC’s Taiwan Semiconductor Manufac Position

Does William Blair Investment Management, LLC own Taiwan Semiconductor Manufac (TSM)? Yes — 5.52M shares worth $1.9B (+6.16% of its 13F portfolio) as of Q1 2026, down from 5.99M shares the prior filed quarter.

Position Value
$1.9B
Q1 2026
Shares
5.52M
% of Portfolio
+6.16%
Quarters Held
30
currently held

Position History TSM

Reported value by quarter
Q4 ’18: $606MQ4 ’18Q1 ’19: $672MQ2 ’19: $634MQ3 ’19: $805MQ4 ’19: $1.0BQ4 ’19Q1 ’20: $828MQ2 ’20: $850MQ3 ’20: $1.1BQ4 ’20: $1.3BQ4 ’20Q1 ’21: $1.2BQ2 ’21: $1.3BQ3 ’21: $1.2BQ4 ’21: $1.4BQ4 ’21Q1 ’22: $1.1BQ2 ’22: $769MQ3 ’22: $627MQ4 ’22: $727MQ4 ’22Q1 ’23: $1.0BQ2 ’23: $1.2BQ3 ’23: $1.0BQ4 ’23: $1.2BQ4 ’23Q1 ’24: $1.3BQ2 ’24: $1.5BQ3 ’24: $1.4BQ4 ’24: $1.5BQ4 ’24Q1 ’25: $1.2BQ2 ’25: $1.5BQ3 ’25: $1.8BQ4 ’25: $1.8BQ4 ’25Q1 ’26: $1.9Bfilingsflow.com
QuarterSharesValue% of Portfolio
Q1 20265.52M$1.9B+6.16%
Q4 20255.99M$1.8B+5.07%
Q3 20256.42M$1.8B+4.64%
Q2 20256.62M$1.5B+3.98%
Q1 20257.36M$1.2B+3.43%
Q4 20247.72M$1.5B+3.72%
Q3 20248.22M$1.4B+3.52%
Q2 20248.89M$1.5B+4.05%
Q1 20249.51M$1.3B+3.34%
Q4 202311.23M$1.2B+3.40%
Q3 202311.78M$1.0B+3.40%
Q2 202311.42M$1.2B+3.70%
Q1 202311.19M$1.0B+3.63%
Q4 20229.76M$727M+2.78%
Q3 20229.15M$627M+2.48%
Q2 20229.40M$769M+2.85%
Q1 202210.78M$1.1B+3.36%
Q4 202111.31M$1.4B+3.68%
Q3 202111.01M$1.2B+3.47%
Q2 202110.83M$1.3B+4.09%
Q1 202110.34M$1.2B+3.96%
Q4 202012.23M$1.3B+4.44%
Q3 202013.33M$1.1B+4.21%
Q2 202014.97M$850M+3.46%
Q1 202017.32M$828M+4.03%
Q4 201917.34M$1.0B+4.01%
Q3 201917.32M$805M+3.44%
Q2 201916.19M$634M+2.66%
Q1 201916.41M$672M+2.83%
Q4 201816.41M$606M+3.01%

Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See William Blair Investment Management, LLC’s full portfolio or all institutional holders of TSM.