William Blair Investment Management’s Donaldson DCI Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$137M	Sell	1,615,349 -92,523	-5%	-$8.94M	0.45%	59
2025 Q4	$151M	Buy	1,707,872 +1,701,387	+26,236%	+$148M	0.42%	57
2025 Q3	$531K	Sell	6,485 -213	-3%	-$16.1K	﹤0.01%	365
2025 Q2	$465K	Sell	6,698 -111	-2%	-$7.47K	﹤0.01%	382
2025 Q1	$457K	Buy	+6,809	New	+$471K	﹤0.01%	381
2021 Q4	–	Sell	-36,849	Closed	-$2.12M	–	432
2021 Q3	$2.12M	Hold	36,849	–	–	0.01%	379
2021 Q2	$2.34M	Hold	36,849	–	–	0.01%	285
2021 Q1	$2.14M	Hold	36,849	–	–	0.01%	359
2020 Q4	$2.06M	Sell	36,849 -5,070	-12%	-$268K	0.01%	349
2020 Q3	$1.95M	Hold	41,919	–	–	0.01%	337
2020 Q2	$1.95M	Hold	41,919	–	–	0.01%	331
2020 Q1	$1.62M	Hold	41,919	–	–	0.01%	324
2019 Q4	$2.42M	Hold	41,919	–	–	0.01%	342
2019 Q3	$2.18M	Hold	41,919	–	–	0.01%	341
2019 Q2	$2.13M	Sell	41,919 -39,559	-49%	-$2.01M	0.01%	352
2019 Q1	$4.08M	Sell	81,478 -6,232	-7%	-$301K	0.02%	348
2018 Q4	$3.81M	Sell	87,710 -1,541,753	-95%	-$79.7M	0.02%	347
2018 Q3	$94.9M	Buy	1,629,463 +85,798	+6%	+$4.31M	0.33%	96
2018 Q2	$69.7M	Buy	+1,543,665	New	+$71.3M	0.26%	118