Oberweis Asset Management’s Ceco Environmental CECO Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$8.05M	Sell	135,032 -10,476	-7%	-$674K	0.24%	126
2025 Q4	$8.71M	Buy	145,508 +53,500	+58%	+$2.86M	0.32%	116
2025 Q3	$4.71M	Buy	+92,008	New	+$3.89M	0.18%	149
2024 Q4	–	Sell	-201,400	Closed	-$5.68M	–	205
2024 Q3	$5.68M	Sell	201,400 -193,300	-49%	-$5.44M	0.29%	127
2024 Q2	$11.4M	Sell	394,700 -68,700	-15%	-$1.66M	0.7%	50
2024 Q1	$10.7M	Buy	463,400 +36,700	+9%	+$756K	0.77%	49
2023 Q4	$8.65M	Buy	426,700 +10,000	+2%	+$182K	0.81%	24
2023 Q3	$6.65M	Buy	416,700 +24,100	+6%	+$330K	0.71%	33
2023 Q2	$5.25M	Buy	392,600 +170,000	+76%	+$2.11M	0.64%	41
2023 Q1	$3.11M	Buy	222,600 +40,500	+22%	+$573K	0.48%	60
2022 Q4	$2.13M	Buy	182,100 +24,900	+16%	+$282K	0.45%	64
2022 Q3	$1.39M	Buy	+157,200	New	+$1.35M	0.33%	72