ACK Asset Management’s Advanced Drainage Systems WMS Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$53.5M	Hold	390,000	–	–	6.68%	2
2025 Q4	$56.5M	Hold	390,000	–	–	7.09%	3
2025 Q3	$54.1M	Buy	390,000 +45,000	+13%	+$5.91M	6.77%	5
2025 Q2	$39.6M	Buy	+345,000	New	+$38.6M	5.2%	12
2020 Q2	–	Sell	-286,500	Closed	-$6.2M	–	24
2020 Q1	$6.2M	Sell	286,500 -573,500	-67%	-$23.2M	3.1%	14
2019 Q4	$18.5M	Sell	860,000 -373,300	-30%	-$13.8M	5.37%	9
2019 Q3	$29.3M	Buy	1,233,300 +101,800	+9%	+$3.31M	8.25%	1
2019 Q2	$24.8M	Sell	1,131,500 -85,500	-7%	-$2.47M	7.19%	1
2019 Q1	$26.9M	Buy	1,217,000 +45,600	+4%	+$1.15M	7.43%	3
2018 Q4	$25.7M	Buy	1,171,400 +51,400	+5%	+$1.38M	8.74%	5
2018 Q3	$34.6M	Sell	1,120,000 -55,300	-5%	-$1.68M	9.51%	3
2018 Q2	$25.5M	Sell	1,175,300 -400,000	-25%	-$10.7M	6.82%	4
2018 Q1	$40.8M	Buy	1,575,300 +75,300	+5%	+$1.91M	10.27%	1
2017 Q4	$35.8M	Buy	1,500,000 +675,000	+82%	+$14.5M	8.03%	3
2017 Q3	$16.7M	Sell	825,000 -550,000	-40%	-$11.1M	4.61%	8
2017 Q2	$27.6M	Buy	1,375,000 +40,000	+3%	+$859K	6.24%	4
2017 Q1	$29M	Buy	1,335,000 +305,000	+30%	+$6.92M	8.58%	1
2016 Q4	$21.2M	Sell	1,030,000 -128,200	-11%	-$2.69M	6.24%	5
2016 Q3	$27.9M	Hold	1,158,200	–	–	8.45%	3
2016 Q2	$31.7M	Buy	1,158,200 +363,200	+46%	+$8.84M	9.42%	2
2016 Q1	$16.9M	Buy	795,000 +405,000	+104%	+$8.32M	6.66%	5
2015 Q4	$9.37M	Buy	+390,000	New	+$11M	4.89%	9
2015 Q2	–	Sell	-1,090,100	Closed	-$32.6M	–	43
2015 Q1	$32.6M	Buy	1,090,100 +40,000	+4%	+$1.04M	10.31%	2
2014 Q4	$24.1M	Buy	1,050,100 +630,600	+150%	+$13.8M	8.71%	4
2014 Q3	$8.79M	Buy	+419,500	New	+$7.54M	3.16%	11