William Blair Investment Management’s iShares MBS ETF MBB Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Shares Change %	Capital Flow	Portfolio Weight	Portfolio Position
2021 Q1	–	Sell	-512,120	Closed	-$56.4M	–	378
2020 Q4	$56.4M	Sell	512,120 -17,100	-3%	-$1.88M	0.19%	125
2020 Q3	$58.4M	Sell	529,220 -50,780	-9%	-$5.61M	0.23%	115
2020 Q2	$64.2M	Sell	580,000 -35,550	-6%	-$3.94M	0.26%	112
2020 Q1	$68M	Buy	+615,550	New	+$68M	0.33%	98