SEC 13F Intelligence

William Blair Investment Management, LLC / MSFT

William Blair Investment Management, LLC’s Microsoft Corp Position

Does William Blair Investment Management, LLC own Microsoft Corp (MSFT)? Yes — 2.90M shares worth $1.1B (+3.54% of its 13F portfolio) as of Q1 2026, down from 3.49M shares the prior filed quarter.

Position Value
$1.1B
Q1 2026
Shares
2.90M
% of Portfolio
+3.54%
Quarters Held
30
currently held

Position History MSFT

Reported value by quarter
Q4 ’18: $116MQ4 ’18Q1 ’19: $132MQ2 ’19: $147MQ3 ’19: $148MQ4 ’19: $191MQ4 ’19Q1 ’20: $190MQ2 ’20: $304MQ3 ’20: $309MQ4 ’20: $374MQ4 ’20Q1 ’21: $454MQ2 ’21: $532MQ3 ’21: $531MQ4 ’21: $847MQ4 ’21Q1 ’22: $828MQ2 ’22: $824MQ3 ’22: $750MQ4 ’22: $771MQ4 ’22Q1 ’23: $970MQ2 ’23: $1.2BQ3 ’23: $1.2BQ4 ’23: $1.5BQ4 ’23Q1 ’24: $1.8BQ2 ’24: $2.0BQ3 ’24: $2.0BQ4 ’24: $1.9BQ4 ’24Q1 ’25: $1.5BQ2 ’25: $2.0BQ3 ’25: $2.0BQ4 ’25: $1.7BQ4 ’25Q1 ’26: $1.1Bfilingsflow.com
QuarterSharesValue% of Portfolio
Q1 20262.90M$1.1B+3.54%
Q4 20253.49M$1.7B+4.71%
Q3 20253.84M$2.0B+5.14%
Q2 20253.98M$2.0B+5.26%
Q1 20254.13M$1.5B+4.35%
Q4 20244.43M$1.9B+4.56%
Q3 20244.56M$2.0B+4.84%
Q2 20244.51M$2.0B+5.28%
Q1 20244.33M$1.8B+4.71%
Q4 20233.92M$1.5B+4.29%
Q3 20233.80M$1.2B+3.99%
Q2 20233.49M$1.2B+3.81%
Q1 20233.36M$970M+3.38%
Q4 20223.22M$771M+2.95%
Q3 20223.22M$750M+2.97%
Q2 20223.21M$824M+3.05%
Q1 20222.68M$828M+2.47%
Q4 20212.52M$847M+2.29%
Q3 20211.88M$531M+1.50%
Q2 20211.96M$532M+1.67%
Q1 20211.93M$454M+1.47%
Q4 20201.68M$374M+1.25%
Q3 20201.47M$309M+1.20%
Q2 20201.49M$304M+1.24%
Q1 20201.21M$190M+0.93%
Q4 20191.21M$191M+0.76%
Q3 20191.06M$148M+0.63%
Q2 20191.10M$147M+0.62%
Q1 20191.12M$132M+0.55%
Q4 20181.14M$116M+0.57%

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 MSFT.