Advanced Drainage Systems Ownership & Insider Activity

Advanced Drainage Systems (WMS) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 3.7% of shares outstanding. Institutional investors hold 80.0%.

Shares Outstanding

76.596M

Shares Float

67.494M

Insider Shares Owned

2.822M

Insider % Owned

3.7%

Institutional Shares Held

60.345M

Institutional % Held

80.0%

Ownership Breakdown

Net Insider Activity by Month

Advanced Drainage Systems Insider Transactions (Last 6 Months)

No insider filings in the last 6 months.

Date	Member	Party	Chamber	Action	Amount
Jul 16, 2025	Lisa McClain	R	House	S	$1,001 - $15,000
Jun 17, 2025	Lisa McClain	R	House	P	$1,001 - $15,000
Jan 13, 2025	Robert Bresnahan	R	House	S	$1,001 - $15,000
May 7, 2024	Tommy Tuberville	R	Senate	S	$1,001 - $15,000
May 7, 2024	Tommy Tuberville	R	Senate	S	$1,001 - $15,000
Oct 17, 2023	Tommy Tuberville	R	Senate	P	$1,001 - $15,000