Michael O'Neill v. Summit Materials, Inc.

IN THE SUPREME COURT OF THE STATE OF DELAWARE MICHAEL O’NEILL, §

§ Plaintiff Below, § No. 23, 2026 Appellant, §

§ Court Below: Court of Chancery v. § of the State of Delaware

§ SUMMIT MATERIALS, INC., § C.A. No. 2025-0695

§ Defendant Below, § Appellee. §

Submitted: June 10, 2026 Decided: June 24, 2026

Before SEITZ, Chief Justice; TRAYNOR, LEGROW and GRIFFITHS, Justices, and NEWELL, Chief Judge,* constituting the Court en Banc.

ORDER This 24th day of June 2026, after careful consideration of the parties’ briefs and the record below, and following oral argument, we find it evident that the judgment of the Court of Chancery should be affirmed on the basis of and for the reasons stated in its Letter Opinion dated December 19, 2025.

NOW, THEREFORE, IT IS HEREBY ORDERED that the judgment of the Court of Chancery is AFFIRMED.

BY THE COURT: /s/ Collins J. Seitz, Jr.

Chief Justice