Advanced Drainage Systems Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NYSE:WMS Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
06 Mar 24	SellUS$1,635,209	Michael Huebert	Individual	10,000	US$163.52
16 Feb 24	SellUS$1,625,400	Mark Haney	Individual	10,000	US$162.54
12 Feb 24	SellUS$1,497,143	Robert Klein	Individual	9,163	US$163.39
14 Dec 23	SellUS$1,862,373	Michael Huebert	Individual	13,473	US$138.23
07 Nov 23	SellUS$710,567	Robert Klein	Individual	6,353	US$111.85
12 Sep 23	SellUS$305,871	Tim Makowski	Individual	2,500	US$122.35
07 Sep 23	SellUS$21,785,072	Berkshire Partners LLC	Company	171,474	US$128.27
01 Sep 23	SellUS$29,116,592	Berkshire Partners LLC	Company	225,000	US$131.08
25 Aug 23	SellUS$28,359,865	Berkshire Partners LLC	Company	228,280	US$125.45
24 Aug 23	SellUS$388,440	Alexander Fischer	Individual	3,112	US$124.82
07 Aug 23	SellUS$134,500	Darin Harvey	Individual	1,000	US$134.50
13 Jun 23	SellUS$327,750	Tim Makowski	Individual	3,000	US$109.25
09 Jun 23	SellUS$1,055,700	Michael Huebert	Individual	10,000	US$105.57
05 Jun 23	SellUS$718,550	Darin Harvey	Individual	7,000	US$102.65

Insider Trading Volume

Insider Buying: WMS insiders have only sold shares in the past 3 months.

Ownership Breakdown

What is the ownership structure of WMS?
Owner Type	Number of Shares	Ownership Percentage
Private Companies	8,987	0.0116%
State or Government	66,047	0.0851%
Individual Insiders	1,089,207	1.4%
General Public	1,753,799	2.26%
Employee Share Scheme	7,009,312	9.03%
Institutions	67,689,476	87.2%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 64.06% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
9.03%	Advanced Drainage Systems, Inc. Employee Stock Ownership Plan	7,009,312	US$1.1b	-15.4%	no data
9%	BlackRock, Inc.	6,986,519	US$1.1b	-3.43%	0.02%
8.85%	The Vanguard Group, Inc.	6,870,070	US$1.1b	-0.13%	0.02%
4.36%	Baillie Gifford & Co.	3,380,496	US$541.8m	-3.96%	0.24%
3.49%	Impax Asset Management Group Plc	2,706,706	US$433.8m	-10.3%	1.09%
2.95%	State Street Global Advisors, Inc.	2,293,050	US$367.5m	3.32%	0.02%
2.52%	Pictet Asset Management Limited	1,954,733	US$313.3m	27.8%	0.21%
2.05%	Thrivent Investment Management Inc.	1,594,785	US$255.6m	-0.42%	0.49%
1.83%	American Century Investment Management Inc	1,418,187	US$227.3m	0.16%	0.13%
1.8%	Invesco Capital Management LLC	1,399,004	US$224.2m	8.23%	0.11%
1.8%	William Blair Investment Management, LLC	1,394,616	US$223.5m	-3.95%	0.3%
1.73%	UBS Asset Management AG	1,342,349	US$215.2m	2.82%	0.03%
1.73%	Swedbank Robur Fonder AB	1,339,281	US$214.7m	-15.2%	0.17%
1.67%	Boston Partners Global Investors, Inc.	1,299,489	US$208.3m	16%	0.14%
1.49%	Canada Pension Plan Investment Board	1,158,288	US$185.7m	-10.3%	0.13%
1.37%	Geode Capital Management, LLC	1,066,994	US$171.0m	3.84%	0.01%
1.12%	Eaton Vance Management	868,714	US$139.2m	0%	0.04%
1.09%	Berkshire Partners LLC	842,895	US$135.1m	0%	8.65%
1.03%	Liontrust Asset Management PLC	799,450	US$128.1m	-5.8%	0.49%
0.98%	Stockbridge Partners LLC	762,895	US$122.3m	0%	2.57%
0.85%	KBC Asset Management NV	659,483	US$105.7m	0.39%	0.2%
0.85%	BNY Mellon Asset Management	658,233	US$105.5m	-4.33%	0.02%
0.85%	Northern Trust Global Investments	655,909	US$105.1m	1.31%	0.02%
0.82%	Dimensional Fund Advisors LP	633,392	US$101.5m	2.54%	0.02%
0.81%	Norges Bank Investment Management	630,261	US$101.0m	26.7%	0.01%