Tim A. Makowski - 26 May 2026 Form 4 Insider Report for ADVANCED DRAINAGE SYSTEMS, INC. (WMS)

Reporting relationship: Vice President, Controller and Chief Accounting Officer
Issuer ticker: WMS
Reported as of: 26 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 28 May 2026, 16:05:05 UTC
Prior SEC filing: 27 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Tim A. Makowski, by Scott A. Cottrill as attorney-in-fact

Key filing fact

Tim A. Makowski filed Form 4 for ADVANCED DRAINAGE SYSTEMS, INC. (WMS) on 28 May 2026.

Key facts

This page summarizes Tim A. Makowski's Form 4 filing for ADVANCED DRAINAGE SYSTEMS, INC. (WMS).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 28 May 2026, 16:05.

Change

Previous filing in this sequence was filed on 27 May 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001672236 Primary reporting owner

MAKOWSKI TIM A

Relationship: Vice President, Controller and Chief Accounting Officer
Address: C/O ADVANCED DRAINAGE SYSTEMS, INC., 4024 GREEN STRIPE LANE, HILLIARD
Signature: /s/ Tim A. Makowski, by Scott A. Cottrill as attorney-in-fact
Signature date: 28 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

WMS transaction

Common Stock

Award

Transaction value
Shares: +847
Change %: +14%
Price: $0.000000^*
Shares after: 6,722
Date: 26 May 2026
Ownership: Direct

WMS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 17,557
Date: 26 May 2026
Ownership: By KSOP
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

WMS transaction Derivative

Option to Purchase Common Stock

Award

Transaction value
Shares: +1,886
Change %
Price: $0.000000^*
Shares after: 1,886
Date: 26 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,886
Exercise price: $138.09
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Represents current allocation under KSOP.

Footnote F2

The options vest in three equal annual installments beginning on May 26, 2027, provided that the Reporting Person remains continuously employed by the Issuer through each applicable vesting date.

SEC remarks

Vice President, Controller and Chief Accounting Officer