Cottrill Scott A 4

What Happened Scott A. Cottrill, EVP, Chief Financial Officer and Secretary of Advanced Drainage Systems, Inc. (WMS), received equity awards on May 26, 2026. The Form 4 shows an award of 2,503 shares of common stock (acquired at $0.00) and a derivative award of 5,573 units (acquired at $0.00) — the derivative award is described in the filing as options that vest over time. No cash was paid at grant.

Key Details

• Transaction date: 2026-05-26; Form 4 filed: 2026-05-28 (reported within two days).
• Grants: 2,503 shares of common stock @ $0.00; 5,573 derivative units @ $0.00.
• Footnotes: filing notes 89 of the shares were acquired under the company ESPP (exempt) and some allocation relates to the KSOP; the derivative award consists of options that vest in three equal annual installments beginning May 26, 2027.
• Shares owned after the transaction: not provided in the materials you supplied.
• Filing timeliness: filed two days after the transaction (appears timely under Form 4 rules).

Context These entries are awards/grants (A) — not open-market purchases or sales. The derivative award represents options that will vest in future installments (not an immediate exercise or sale). Grants like these are common as compensation and do not by themselves indicate the insider bought or sold stock on the open market.