ADVANCED DRAINAGE SYSTEMS, INC.

WMSNYSE

$129.43+2.16 (+1.70%)as of Oct 5, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

ADVANCED DRAINAGE SYSTEMS, INC. price and activity chart data

Showing the 1Y range: Oct 6, 2025 to Oct 5, 2026. Price (-8.5%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
BlackRock, Inc.	10.47%	$1.17B	0.02%	Not reported
Vanguard Portfolio Management LLC	5.20%	$582M	0.03%	Not reported
Vanguard Capital Management LLC	4.76%	$533M	0.01%	Not reported
State Street Corp	3.78%	$423M	0.01%	Not reported
First Trust Advisors LP	3.73%	$418M	0.25%	Add 30.17%
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	3.29%	$368M	0.07%	Not reported
Impax Asset Management Group plc	2.59%	$290M	1.89%	Reduce 4.23%
Baillie Gifford & Co	2.57%	$288M	0.26%	Reduce 10.36%
American Century Companies Inc	2.29%	$257M	0.11%	Not reported
Morgan Stanley	1.95%	$219M	0.01%	Not reported
Geode Capital Management, LLC	1.92%	$215M	0.01%	Not reported
Amundi	1.90%	$213M	0.05%	Not reported
Norges Bank	1.83%	$205M	0.02%	Not reported
Dimensional Fund Advisors LP	1.79%	$201M	0.04%	Not reported
Pictet Asset Management Holding SA	1.58%	$177M	0.17%	Reduce 48.84%
Kayne Anderson Rudnick Investment Management LLC	1.45%	$162M	0.50%	Reduce 6.43%
KBC Group NV	1.30%	$145M	0.31%	Add 0.73%
Wellington Management Group LLP	1.18%	$132M	0.02%	Reduce 20.95%
Qube Research & Technologies Ltd	1.18%	$132M	0.12%	Not reported
Invesco Ltd.	1.17%	$131M	0.01%	Not reported
Impactive Capital LP	1.10%	$123M	8.77%	Reduce 8.61%
Charles Schwab Investment Management Inc	0.98%	$109M	0.01%	Not reported
Bamco Inc	0.95%	$107M	0.16%	Add 133.70%
Capital International Investors	0.92%	$103M	0.02%	Add 2.86%
Goldman Sachs Group Inc	0.90%	$101M	0.01%	Not reported
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	0.89%	$99.6M	0.12%	Not reported
Mirova US LLC	0.87%	$97.2M	1.04%	Reduce 1.55%
Northern Trust Corp	0.83%	$93.3M	0.01%	Not reported
Liontrust Investment Partners LLP	0.78%	$87.7M	1.29%	Add 6.46%
Schroder Investment Management Group	0.77%	$85.2M	0.06%	Add 4.95%
Ameriprise Financial Inc	0.74%	$83M	0.02%	Not reported
Triodos Investment Management BV	0.74%	$82.9M	5.05%	Reduce 1.57%
Hill City Capital, LP	0.67%	$75.3M	1.76%	Add 29.73%
Bank of New York Mellon Corp	0.66%	$74.1M	0.01%	Not reported
Schonfeld Strategic Advisors LLC	0.65%	$72.2M	0.26%	Not reported
Vanguard Fiduciary Trust Co	0.64%	$71.8M	0.02%	Not reported
Interval Partners, LP	0.63%	$71M	1.83%	Add 16.30%
Thrivent Financial for Lutherans	0.60%	$66.8M	0.11%	Add 108.68%
Swedbank AB	0.58%	$64.5M	0.06%	Add 148.94%
Brown Brothers Harriman & Co	0.57%	$63.6M	0.28%	Not reported
ACK Asset Management LLC	0.55%	$61.2M	7.15%	Not reported
Allianz Asset Management GmbH	0.54%	$52.3M	0.05%	Not reported
Westwood Holdings Group Inc	0.52%	$57.7M	0.44%	Reduce 33.50%
Jupiter Topco LLC	0.51%	$56.8M	0.02%	Not reported
Corient Private Wealth LP	0.49%	$54.9M	0.08%	Not reported
Balyasny Asset Management L.P.	0.48%	$53.8M	0.07%	Not reported
Bank of America Corp	0.48%	$53.4M	0.00%	Not reported
Stifel Financial Corp	0.44%	$49.7M	0.04%	Not reported
Marshall Wace, LLP	0.44%	$49.4M	0.04%	Not reported
JPMorgan Chase & Co	0.39%	$43.2M	0.00%	Not reported

50 of 522 holders

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