SEC 13F Intelligence

William Blair Investment Management, LLC / BWXT

William Blair Investment Management, LLC’s Bwx Technologies Inc Position

Does William Blair Investment Management, LLC own Bwx Technologies Inc (BWXT)? Yes — 981.8K shares worth $201M (+0.66% of its 13F portfolio) as of Q1 2026, down from 1.11M shares the prior filed quarter.

Position Value
$201M
Q1 2026
Shares
981.8K
% of Portfolio
+0.66%
Quarters Held
30
currently held

Position History BWXT

Reported value by quarter
Q4 ’18: $242MQ4 ’18Q1 ’19: $315MQ2 ’19: $365MQ3 ’19: $409MQ4 ’19: $457MQ4 ’19Q1 ’20: $379MQ2 ’20: $431MQ3 ’20: $423MQ4 ’20: $445MQ4 ’20Q1 ’21: $492MQ2 ’21: $427MQ3 ’21: $391MQ4 ’21: $333MQ4 ’21Q1 ’22: $352MQ2 ’22: $352MQ3 ’22: $335MQ4 ’22: $363MQ4 ’22Q1 ’23: $400MQ2 ’23: $414MQ3 ’23: $422MQ4 ’23: $356MQ4 ’23Q1 ’24: $411MQ2 ’24: $377MQ3 ’24: $344MQ4 ’24: $150MQ4 ’24Q1 ’25: $24MQ2 ’25: $219MQ3 ’25: $231MQ4 ’25: $191MQ4 ’25Q1 ’26: $201Mfilingsflow.com
QuarterSharesValue% of Portfolio
Q1 2026981.8K$201M+0.66%
Q4 20251.11M$191M+0.53%
Q3 20251.26M$231M+0.60%
Q2 20251.52M$219M+0.58%
Q1 2025243.5K$24M+0.07%
Q4 20241.35M$150M+0.37%
Q3 20243.16M$344M+0.85%
Q2 20243.97M$377M+0.99%
Q1 20244.01M$411M+1.06%
Q4 20234.63M$356M+1.03%
Q3 20235.63M$422M+1.40%
Q2 20235.79M$414M+1.33%
Q1 20236.35M$400M+1.40%
Q4 20226.25M$363M+1.39%
Q3 20226.65M$335M+1.32%
Q2 20226.40M$352M+1.31%
Q1 20226.54M$352M+1.05%
Q4 20216.96M$333M+0.90%
Q3 20217.25M$391M+1.10%
Q2 20217.36M$427M+1.34%
Q1 20217.46M$492M+1.59%
Q4 20207.39M$445M+1.48%
Q3 20207.51M$423M+1.65%
Q2 20207.60M$431M+1.75%
Q1 20207.77M$379M+1.84%
Q4 20197.36M$457M+1.82%
Q3 20197.15M$409M+1.75%
Q2 20197.01M$365M+1.53%
Q1 20196.35M$315M+1.33%
Q4 20186.34M$242M+1.20%

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 BWXT.