BARBOUR D. SCOTT 4

What Happened

• Barbour D. Scott, President & Chief Executive Officer and a director of Advanced Drainage Systems, reported a paired disposition and acquisition of 511 shares of ADS common stock on June 12, 2026. Each leg was at $135.72 per share for a value of $69,352.92. This was not an open-market sale or purchase but an internal transfer of shares from a grantor retained annuity irrevocable remainder trust into his revocable trust; Mr. Scott contributed cash equal to the share value in exchange. He remained the beneficial owner both before and after the transfer.

Key Details

• Transaction date: 2026-06-12; Price: $135.72; Shares: 511; Value per leg: $69,352.92.
• Reported as both a disposition and an acquisition to reflect the trust-to-trust transfer.
• Post-transaction beneficial ownership: filing states Mr. Scott was the beneficial owner before and after; total holdings not specified on this Form 4.
• Relevant footnotes: F1 explains the transfer and cash contribution and cites possible exemption under Rule 16a-13; F2–F3 describe the irrevocable remainder trust (beneficiaries: nieces/nephew) and the revocable trust (for Mr. Scott’s benefit).
• Filing timeliness: Transaction occurred 2026-06-12 and Form 4 was filed 2026-06-17 (appears late relative to the usual two-business-day deadline).

Context

• Trust-to-trust transfers and internal reallocations are administrative/estate-planning moves and do not necessarily signal a change in the insider’s view of the company; the reporting person remained the beneficial owner. The filing notes reliance on Rule 16a-13 for an exemption, which typically covers certain trust transfers.