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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1604028	Advanced Drainage Systems Inc.	WMS	Plastics Foam Products (3086)	510105665

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1676191	Anil Seetharam	200 Clarendon Street Floor 35 Boston MA 02116		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2024-02-28	762,895	$163.00	0	No	4	S	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See Footnote

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	11,026	Direct
Common Stock	1,196	Indirect	By Family Trusts

Footnotes

Represents shares by Stockbridge Fund, L.P. ("SF") and other certain accounts (collectivelly, the "Berkshire Entities"). Stockbridge Associates LLC ("SA") is the general partner of SF. Stockbridge Partners LLC ("SP") is the investment adviser to SF and such certain other accounts. Berkshire Partners Holdings LLC ("BPH") is the general partner of BPSP, L.P. ("BPSP"), which is the managing member of SP.
(continued from Footnote 1) The Reporting Person is a managing member of BPH, BPSP, SP, and SA. By virtue of the relationships described in the preceding sentences, the Reporting Person may be deemed to share beneficial ownership with respect to the shares of common stock held by the Berkshire Entities. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purpose.