Advanced Drainage Systems Ownership | Who Owns Advanced Drainage Systems?

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Advanced Drainage Systems Ownership Summary

Advanced Drainage Systems is owned by 93.18% institutional investors, 9.04% insiders. Blackrock is the largest institutional shareholder, holding 9.69% of WMS shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 3.16% of its assets in Advanced Drainage Systems shares.

WMS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Advanced Drainage Systems	93.18%	9.04%	-2.22%
Sector	Industrials Stocks	64.11%	12.72%	23.17%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	7.58M	9.69%	$1.22B
Vanguard group	7.48M	9.65%	$1.04B
Blackrock funding, inc. /de	7.04M	9.08%	$976.85M
Pictet asset management sa	2.60M	3.36%	$299.08M
Impax asset management group	2.50M	3.22%	$345.79M
First trust advisors lp	2.42M	3.12%	$335.23M
Baillie gifford	2.40M	3.09%	$332.20B
State street	2.34M	2.98%	$374.60M
Ubs asset management americas	2.06M	2.66%	$238.66M
Invesco	1.69M	2.18%	$195.20M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Triodos investment management bv	546.01K	5.48%	$75.73M
Ack asset management	345.00K	5.20%	$39.63M
Owls nest partners ia	192.35K	4.93%	$22.24M
Alpine peaks capital, lp	46.32K	4.40%	$5.35M
Sg capital management	328.70K	4.06%	$45.59M
Tradelink capital	3.67K	3.67%	$510.00K
Prentiss smith	43.18K	3.38%	$5.99M
Edentree asset management	82.42K	2.75%	$11.43M
Mig capital	231.82K	2.75%	$26.63M
Rik saylor financial	25.47K	2.58%	$3.53M

Top Buyers

Holder	Shares	% Assets	Change
Kayne anderson rudnick investment management	1.28M	0.35%	1.16M
Ubs asset management americas	2.06M	0.06%	799.57K
Norges bank	745.55K	0.01%	745.55K
Capital investors	692.35K	0.01%	563.51K
Interval partners, lp	489.12K	0.95%	489.12K

Top Sellers

Holder	Shares	% Assets	Change
Pictet asset management sa	2.60M	0.30%	-579.18K
Impax asset management group	2.50M	2.02%	-543.83K
Alyeska investment group	-	-	-422.08K
Close asset management	-	-	-374.93K
Mirae asset global investments	-	-	-370.80K

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	745.55K	0.01%	745.55K	$86.19M
Interval partners, lp	489.12K	0.95%	489.12K	$56.18M
Ack asset management	345.00K	5.20%	345.00K	$39.63M
Sg capital management	328.70K	4.06%	328.70K	$45.59M
Owls nest partners ia	192.35K	4.93%	192.35K	$22.24M

Sold Out

Holder	Change
Nelson, van denburg & campbell wealth management group	-1.00
Rakuten securities	-2.00
Manchester capital management	-2.00
New millennium group	-2.00
Td capital management	-2.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2025	482	1.69%	72,251,158	4.96%	93	1.18%	252	-1.18%	168	13.51%
Mar 31, 2025	472	-0.42%	67,928,962	1.25%	87	1.17%	253	0.80%	148	-3.27%
Dec 31, 2024	253	-48.99%	41,939,922	-35.33%	54	0.77%	123	-46.05%	84	-55.56%
Sep 30, 2024	493	-3.52%	64,750,129	1.44%	83	1.23%	226	-16.61%	188	13.25%
Jun 30, 2024	506	0.60%	63,816,995	2.56%	81	1.28%	267	-1.48%	165	-2.37%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	2.45M	3.16%	1.76K
Vanguard Total Stock Mkt Idx Inv	2.44M	3.14%	-51.66K
iShares Core S&P Mid-Cap ETF	2.30M	2.96%	-
Vanguard Small Cap Index	1.88M	2.42%	-11.92K
Impax Water Strategy Composite	1.80M	2.31%	-159.75K
Pictet-Water I EUR	1.60M	2.06%	106.48K
Pictet Water Segregated Accounts	1.56M	2.02%	1.56M
First Trust RBA Amer Indl RenaisTM ETF	1.22M	1.57%	7.66K
Vanguard Small Cap Growth Index Inv	1.06M	1.36%	-2.76K
BNP Paribas Aqua I	924.99K	1.19%	-79.87K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 09, 2025	HARVEY DARIN S.	EVP, Supply Chain & Logistics	Sell	$519.56K
Feb 19, 2025	HARVEY DARIN S.	EVP, Supply Chain & Logistics	Sell	$186.00K
May 30, 2024	Cottrill Scott A	EVP, CFO AND SECRETARY	Sell	$12.67M
May 31, 2024	MAKOWSKI TIM A	See Remarks	Sell	$648.60K
May 31, 2024	HUEBERT MICHAEL G.	Executive Vice President	Sell	$1.73M

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	-
2025 Q3	-	-
2025 Q2	-	1
2025 Q1	-	1
2024 Q4	-	-

WMS Ownership FAQ

Who owns the most shares of Advanced Drainage Systems?

Advanced Drainage Systems’s largest shareholders are Blackrock (7.58M shares, 9.69%), Vanguard group (7.48M shares, 9.65%), and Blackrock funding, inc. /de (7.04M shares, 9.08%). Together, they hold 28.42% of Advanced Drainage Systems’s total shares outstanding.

Does Blackrock own Advanced Drainage Systems?

Yes, BlackRock owns 9.69% of Advanced Drainage Systems, totaling 7.58M shares as of Jun 2024. This represents 0.03% of BlackRock's total assets, with a market value of 1.22B$. In the last quarter, BlackRock increased its holdings by 263.44K shares, a 3.60% change.

Who is Advanced Drainage Systems’s biggest shareholder by percentage of total assets invested?

Triodos investment management bv is Advanced Drainage Systems’s biggest shareholder by percentage of total assets invested, with 5.48% of its assets in 546.01K Advanced Drainage Systems shares, valued at 75.73M$.

Who is the top mutual fund holder of Advanced Drainage Systems shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of Advanced Drainage Systems shares, with 3.16% of its total shares outstanding invested in 2.45M Advanced Drainage Systems shares.

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