Form 4: Director John Koraleski Acquires MLM Stock Units

Martin Marietta Materials Director John J. Koraleski acquired 75 common stock units valued at $623.24 each under a pre-arranged director compensation plan.

Summary

• John J. Koraleski, a Director of Martin Marietta Materials Inc. (MLM), acquired 75 common stock units.
• The acquisition occurred on November 28, 2025, with each unit valued at $623.24.
• These units were accrued under the Martin Marietta Materials, Inc. Common Stock Purchase Plan for Directors.
• The transaction was made pursuant to a Rule 10b5-1(c) plan, indicating a pre-scheduled, non-discretionary acquisition.
• The units are to be settled in stock in a lump sum or installments not exceeding 10 years, commencing upon the reporting person ceasing to be a Non-Employee Director, one month and one year following cessation, or a director-elected date later than the third anniversary of the date the fees are earned.
• Following this transaction, Mr. Koraleski beneficially owns 8,753 shares directly, 2,000 shares indirectly via SJK HOLDINGS and INVESTMENTS, LLC, and 4,900 shares indirectly via JJ KORALESKI and SF KORALESKI CO-TTEE KORALESKI LIVING TRUST U/A DTD 01/18/1991.

Sentiment

Score: 7

Explanation: The acquisition of common stock units by a director, even as part of a compensation plan, generally indicates continued alignment of interests with shareholders and a degree of confidence in the company's long-term performance. The use of a 10b5-1 plan is a neutral, standard practice.

Positives

• A director acquiring additional equity, even through a compensation plan, generally signals continued confidence in the company's future prospects and aligns interests with shareholders.
• The transaction was conducted under a Rule 10b5-1(c) plan, which aligns with good corporate governance practices by demonstrating a pre-scheduled, non-discretionary acquisition.

Future Outlook

The common stock units are to be settled in stock in a lump sum or installments not exceeding 10 years, commencing upon the reporting person ceasing to be a Non-Employee Director, one month and one year following cessation, or a director-elected date later than the third anniversary of the date the fees are earned.

Industry Context

This is a routine insider transaction related to director compensation and does not provide specific insights into broader industry trends for the construction materials sector. It reflects standard corporate governance practices for director equity compensation.

Comparison to Industry Standards

• The acquisition of equity by directors as part of their compensation is a common practice across industries, aligning director incentives with shareholder interests.
• The use of a Rule 10b5-1 plan for such transactions is also standard practice for public company executives and directors to manage insider trading compliance.

Corporate Governance

Related Party Transactions

• The acquisition of common stock units by a director under a company-sponsored plan is considered a related party transaction, involving a transaction between the company and one of its directors as part of their compensation.

Stakeholder Impact

• Shareholders: The director's increased beneficial ownership aligns their interests more closely with shareholders, potentially fostering long-term value creation.
• Employees: No direct impact on employees is indicated by this filing.
• Customers/Suppliers/Creditors: No direct impact on these stakeholders is indicated by this filing.

Next Steps

• The common stock units will be settled in stock at a future date based on the director's election or cessation of service, as per the terms of the Common Stock Purchase Plan for Directors.

Key Dates

Recommendation

This Form 4 reports a routine acquisition of common stock units by a director as part of a compensation plan, executed under a 10b5-1 plan. While insider buying can be a positive signal, this specific transaction is part of a pre-arranged compensation structure rather than a discretionary open-market purchase, making it less indicative of a strong 'buy' signal. It reinforces director alignment but does not present new information warranting a change from a 'hold' position without further fundamental analysis.

Keywords

Martin Marietta Materials, MLM, John J. Koraleski, Director, Insider Transaction, Form 4, Stock Acquisition, Common Stock Purchase Plan, 10b5-1 Plan, Corporate Governance