SEC 13F Intelligence

William Blair Investment Management, LLC / CCO

William Blair Investment Management, LLC’s Cameco Corp Position

Does William Blair Investment Management, LLC own Cameco Corp (CCO)? Yes — 1.68M shares worth $183M (+0.60% of its 13F portfolio) as of Q1 2026, down from 1.98M shares the prior filed quarter.

Position Value
$183M
Q1 2026
Shares
1.68M
% of Portfolio
+0.60%
Quarters Held
30
currently held

Position History CCO

Reported value by quarter
Q4 ’18: $20MQ4 ’18Q1 ’19: $21MQ2 ’19: $20MQ3 ’19: $19MQ4 ’19: $18MQ4 ’19Q1 ’20: $81MQ2 ’20: $153MQ3 ’20: $156MQ4 ’20: $207MQ4 ’20Q1 ’21: $260MQ2 ’21: $296MQ3 ’21: $318MQ4 ’21: $293MQ4 ’21Q1 ’22: $368MQ2 ’22: $258MQ3 ’22: $271MQ4 ’22: $254MQ4 ’22Q1 ’23: $268MQ2 ’23: $263MQ3 ’23: $195MQ4 ’23: $176MQ4 ’23Q1 ’24: $169MQ2 ’24: $205MQ3 ’24: $255MQ4 ’24: $209MQ4 ’24Q1 ’25: $138MQ2 ’25: $287MQ3 ’25: $221MQ4 ’25: $181MQ4 ’25Q1 ’26: $183Mfilingsflow.com
QuarterSharesValue% of Portfolio
Q1 20261.68M$183M+0.60%
Q4 20251.98M$181M+0.51%
Q3 20252.64M$221M+0.57%
Q2 20253.87M$287M+0.76%
Q1 20253.36M$138M+0.39%
Q4 20244.06M$209M+0.51%
Q3 20245.35M$255M+0.63%
Q2 20244.16M$205M+0.54%
Q1 20243.89M$169M+0.44%
Q4 20234.07M$176M+0.51%
Q3 20234.91M$195M+0.65%
Q2 20238.40M$263M+0.84%
Q1 202310.24M$268M+0.93%
Q4 202211.21M$254M+0.97%
Q3 202210.21M$271M+1.07%
Q2 202212.29M$258M+0.96%
Q1 202212.64M$368M+1.10%
Q4 202113.42M$293M+0.79%
Q3 202114.62M$318M+0.90%
Q2 202115.41M$296M+0.93%
Q1 202115.63M$260M+0.84%
Q4 202015.41M$207M+0.69%
Q3 202015.43M$156M+0.61%
Q2 202014.96M$153M+0.62%
Q1 202010.62M$81M+0.39%
Q4 20192.08M$18M+0.07%
Q3 20192.03M$19M+0.08%
Q2 20191.83M$20M+0.08%
Q1 20191.82M$21M+0.09%
Q4 20181.74M$20M+0.10%

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 CCO.