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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1604028	Advanced Drainage Systems Inc.	WMS	()	MA

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1267629	M Ross Jones	200 Clarendon Street, 35Th Floor 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	2023-09-12	70,000	$122.19	772,895	No	4	S	Indirect	See Footnote
Common Stock	Disposition	2023-09-14	10,000	$123.66	762,895	No	4	S	Indirect	See Footnote

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

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	70,749	Direct

Footnotes

Represents shares by Stockbridge Fund, L.P. ("SF"). Stockbridge Associates LLC ("SA") is the general partner of SF. Stockbridge Partners LLC ("SP") is the investment adviser to SF. 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 SF. 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.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $121.9832 to $122.4894. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.