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AI brief of an SEC Form 8-K · Martin Marietta Materials (MLM)

Martin Marietta names Christopher Samborski executive VP and chief operating officer effective May 1

Neutral Impact 3 of 5 leadership Written later

Martin Marietta appointed Christopher W. Samborski, currently president of its West and Specialties Divisions, as Executive Vice President and Chief Operating Officer, effective May 1, 2026. The filing sets out his base salary of $775,000, a one-time restricted stock unit grant with a $5,000,000 grant date value, and enhanced severance terms, which are disclosed to shareholders as compensation for a senior executive role.

Key points

  • Appointment effective May 1, 2026; Samborski, age 45, joined the company in August 2018.
  • New base salary of $775,000, target annual incentive of 100% of base salary and target long-term incentive of 260% of base salary.
  • One-time restricted stock unit grant with a grant date value of $5,000,000, vesting on the sixth, seventh and eighth anniversaries of the grant date.
  • Kirk Light assumed leadership of the West and Specialties Divisions while keeping his role as President of the Southwest Division.

The filing

CompanyMartin Marietta Materials (MLM)
Form8-K, current report
Filed with the SECApr 27, 2026, 4:17 PM ET
Accession number0000950157-26-000549

Items reported: 5.02 Director / Officer Change

Read the filing on SEC.gov ↗

Written by AI (Anthropic Claude, claude-haiku-5-5) on Nov 8, 2026, 1:30 AM ET, from the text of the filing and its press-release exhibits only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on April 27, 2026.

Briefs are written by AI from the filing text (each brief's own page names the model) and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the model's reading of the filing for shareholders, not a price forecast. Not investment advice.