Martin Marietta (NYSE: MLM) elevates Chris Samborski to EVP and COO
Filing Impact
Filing Sentiment
Form Type
8-K
Rhea-AI Filing Summary
Martin Marietta Materials, Inc. appointed Christopher W. Samborski as Executive Vice President and Chief Operating Officer, effective May 1, 2026. Samborski has led the company’s West and Specialties Divisions and previously held strategic finance and supply chain roles after joining Martin Marietta in 2018.
Under an offer letter and amended employment agreements, his base salary will be $775,000 with a target annual incentive of 100% of salary and a target long-term incentive of 260% of salary. He will also receive a one-time $5,000,000 restricted stock unit grant vesting in years six through eight. If terminated without cause or he resigns for good reason, he is eligible for severance equal to three times salary plus target bonus, up to three years of health benefits, and continued equity vesting, alongside additional protections following a change of control.
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8-K Event Classification
2 items: 5.02, 9.01
2 items
Item 5.02
Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers
Governance
Key personnel changes including departures, elections, or appointments of directors and executive officers.
Item 9.01
Financial Statements and Exhibits
Exhibits
Financial statements, pro forma financial information, and exhibit attachments filed with this report.
Key Figures
New base salary: $775,000 per year
Target annual incentive: 100% of base salary
Target long-term incentive: 260% of base salary
+5 more
8 metrics
New base salary
$775,000 per year
Base salary for Executive Vice President and COO role
Target annual incentive
100% of base salary
Target bonus under new offer letter
Target long-term incentive
260% of base salary
Equity-based long-term incentive target
One-time RSU grant
$5,000,000 grant-date value
Restricted stock units vesting in years 6, 7 and 8
Severance multiple (no cause/good reason)
3x salary + target bonus
Employment Agreement termination benefits
Change-of-control severance
3x annual compensation
Base salary plus highest bonus in prior five years
Prior base salary
$527,258 per year
Compensation in role held since January 1, 2025
Prior RSU grant
$2,000,000 grant-date value
RSUs vesting on 3rd, 4th and 5th anniversaries
Key Terms
restricted stock units, target annual incentive award, long-term incentive award, severance amount, +2 more
6 terms
restricted stock units financial
"he will receive a one-time grant of restricted stock units with a grant date value of $5,000,000"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
target annual incentive award financial
"his target annual incentive award will be 100% of base salary"
long-term incentive award financial
"his target long-term incentive award will be 260% of base salary"
severance amount financial
"Mr. Samborski is entitled to a severance amount equal to three times the sum of his base salary and target bonus"
non-competition financial
"The Employment Agreement includes a three-year post-termination, non-competition, non-solicitation, and confidentiality covenant."
A non-competition is a contractual restriction that prevents a person or business from starting or working in a competing business within a specified time and geographic area after leaving a job or completing a transaction. It matters to investors because it acts like a temporary fence around customers, trade secrets and know‑how, helping protect future revenue and company value; weak or unenforceable restrictions can increase the risk of customer loss and competitive erosion.
change of control financial
"provides for severance benefits upon a qualifying termination following a change of control of the Company"
A change of control occurs when the ownership or management of a company shifts significantly, such as through a sale, merger, or acquisition, resulting in new leadership or ownership structure. This change can impact the company's direction and decision-making, which is important for investors because it may affect the company's stability, strategy, and future prospects.
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported): April 27, 2026
(Exact name of Registrant as Specified in Its Charter)
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Registrant’s Telephone Number, Including Area Code: (919 )
781-4550
(Former Name or Former Address, if Changed Since Last Report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following
provisions:
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Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
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Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
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Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
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Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
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Securities registered pursuant to Section 12(b) of the Act:
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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2
of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).
Emerging growth company ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised
financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory
Arrangements of Certain Officers.
On April 27, 2026, Martin Marietta Materials, Inc. (the “Company”) announced that the Company has appointed Christopher W. Samborski, to serve as
the Company’s Executive Vice President and Chief Operating Officer, effective as of May 1, 2026 (the “Effective Date”).
Mr. Samborski, age 45, joined the Company in August 2018 and currently serves as President of the West and Specialties Divisions. In January 2025, he assumed the
leadership of the West Division and retained his responsibilities as President of Specialties which he has led since January 2022. Mr. Samborski served as Vice President of Strategic Finance, Procurement and Supply Chain beginning in January 2020
prior to his current roles and served as Vice President of Strategic Finance from 2018 to 2020. Prior to joining the Company, Mr. Samborski spent close to ten years in leadership roles at Caterpillar Inc. and Johnson & Johnson. Mr. Samborski
began his career with General Electric Company and was selected for and completed GE’s elite Operations Management Leadership Program. Mr. Samborski holds a Bachelor of Science degree in industrial engineering from the University of
Wisconsin-Madison and an MBA in strategy and general management from the University of Michigan's Ross School of Business, where he received the Ross Distinguished Scholar Award and graduated with high distinction.
In connection with his promotion to the role of Executive Vice President, Chief Operating Officer, the Company and Mr. Samborski executed an offer
letter (the “Offer Letter”), an amended and restated employment agreement (the “Employment Agreement”) and an amended and restated employment protection agreement (the “Employment Protection Agreement”). Pursuant to the Offer Letter, Mr.
Samborski’s base salary will be $775,000, his target annual incentive award will be 100% of base salary, his target long-term incentive award will be 260% of base salary, and he will receive a one-time grant of restricted stock units with a grant
date value of $5,000,000, which will vest ratably on the sixth, seventh, and eighth anniversaries of the grant date, subject to Mr. Samborski’s continued employment through such date and the other terms and conditions applicable to ordinary course
grants of restricted stock units to the Company’s executive officers. In addition to the terms described in the Offer Letter, the amended Employment Agreement provides that in the event of a termination by the Company without cause or by Mr.
Samborski for good reason, Mr. Samborski is entitled to a severance amount equal to three times the sum of his base salary and target bonus, continued medical and dental benefits for up to three years, and continued vesting of his outstanding
equity awards. The Employment Agreement includes a three-year post-termination, non-competition, non-solicitation, and confidentiality covenant. The Employment Protection Agreement, which aligns with the Company’s Employment Protection Agreements
provided to other executive officers, provides for severance benefits upon a qualifying termination following a change of control of the Company equal to three times Mr. Samborski’s annual compensation (defined as base salary and the highest annual
bonus paid in the preceding five years) and continuation of benefits for 36 months.
Mr. Samborski received the following compensation and benefits in his current position at the Company since January 1, 2025: an annual base salary of
$527,258, a target annual short-term incentive award of 90% of base salary, a target annual long-term incentive award of 200% of base salary, and a one-time grant of restricted stock units with a grant date value of $2,000,000, which vests ratably
on the third, fourth, and fifth anniversaries of the grant date. Other than such compensation arrangements, Mr. Samborski has no interest in any transaction that would require disclosure pursuant to Item 404(a) of Regulation S-K.
A copy of the press release announcing the appointment of Mr. Samborski as Chief Operating Officer of the Company is attached to this Current Report on
Form 8-K as Exhibit 99.1.
Item 9.01 Financial Statement and Exhibits.
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| 99.1 | Press Release dated April 27, 2026 |
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto
duly authorized.
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MARTIN MARIETTA MATERIALS, INC.
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(Registrant)
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Date: April 27, 2026
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By:
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/s/ George F. Schoen |
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George F. Schoen, Executive Vice President, General
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| Counsel and Corporate Secretary |
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Exhibit 99.1
MARTIN MARIETTA APPOINTS
CHRISTOPHER W. SAMBORSKI CHIEF OPERATING OFFICER
Raleigh, N.C. (April 27, 2026) – Martin Marietta Materials, Inc. (NYSE: MLM) (Martin Marietta or the
Company) a leading national supplier of aggregates and other building materials, today announced the appointment of Chris Samborski as Executive Vice President and Chief Operating Officer, effective May 1, 2026.
Mr. Samborski has extensive experience leading operating and finance teams. He most recently served as President of Martin Marietta’s West and Specialties Divisions, where he was
responsible for the overall operations and strategic direction of those business units. Under his leadership, both the West and Specialties Divisions achieved significant growth and success. Mr. Samborski previously served in several other leadership
positions at Martin Marietta, including Vice President of Strategic Finance, Procurement and Supply Chain. Prior to joining Martin Marietta in 2018, Mr. Samborski spent close to ten years in leadership roles at Caterpillar Inc. and Johnson &
Johnson, building broad and deep experience in business strategy, operations management and continuous improvement.
“Chris is an experienced and skilled leader whose effective management has had a meaningful impact on Martin Marietta,” said Ward Nye, Chair and CEO of Martin Marietta. “Chris has
been with our Company for nearly a decade, and he has consistently demonstrated a true commitment to Martin Marietta, our people, our culture and our ongoing pursuit of excellence. He is the ideal person to take on the COO role and to continue
leading, alongside our deeply capable and talented team, as we guide our Company to even greater success.”
“I’m honored to take on this new opportunity, particularly during this period of strong performance and growth for our business,” said Mr. Samborski. “Martin Marietta closed out
2025 by delivering record results across the portfolio, and I look forward to working closely with our teams to build on this positive momentum in 2026 and beyond.”
With Mr. Samborski’s appointment, Kirk Light has assumed leadership of the West and Specialties Divisions while also retaining his historic duties as President of the Southwest
Division.
About Chris Samborski
Mr. Samborski has held multiple leadership roles across operations and finance since joining Martin Marietta in 2018. Prior to serving as President of the West and Specialties
Divisions, he was President of the Specialties Division (2022-2025), Vice President of Strategic Finance, Procurement and Supply Chain (2020-2021) and Vice President of Strategic Finance
(2018-2020).
Before joining Martin Marietta, Mr. Samborski began his career with General Electric Company and was selected for and completed GE’s elite Operations Management Leadership Program.
He subsequently held leadership roles at Johnson & Johnson as well as Caterpillar Inc. He holds a Bachelor of Science degree in Industrial Engineering from the University of Wisconsin-Madison and an MBA in Strategy and General Management from the
University of Michigan’s Ross School of Business.
About Martin Marietta
Martin Marietta, a member of the S&P 500 Index, is an American-based company and a leading supplier of
aggregates and other building materials. Through a network of operations spanning 28 states, Canada and The Bahamas, dedicated Martin Marietta teams supply the resources necessary for building the solid foundations on which our communities
thrive. Martin Marietta’s Specialties business provides high-purity magnesia and dolomitic lime products used worldwide in environmental, industrial, agricultural and other specialty applications. For more information, visit www.martinmarietta.com or www.magnesiaspecialties.com.
Investor Contact:
Jacklyn Rooker
Vice President, Investor Relations
+1 (919) 510-4736
Jacklyn.Rooker@martinmarietta.com
MLM-G.
FAQ
What executive change did Martin Marietta (MLM) announce in this 8-K?
Martin Marietta appointed Christopher W. Samborski as Executive Vice President and Chief Operating Officer, effective May 1, 2026. He previously led the company’s West and Specialties Divisions and has held several strategic finance and operations roles since joining Martin Marietta in 2018.
What is Chris Samborski’s new compensation package at Martin Marietta (MLM)?
Chris Samborski will receive a base salary of $775,000, a target annual incentive equal to 100% of salary, and a target long-term incentive equal to 260% of salary. He will also receive a one-time $5,000,000 restricted stock unit grant with long-term vesting.
How do Chris Samborski’s severance benefits work at Martin Marietta (MLM)?
If Martin Marietta terminates Samborski without cause or he resigns for good reason, he is entitled to severance equal to three times his base salary plus target bonus, up to three years of continued medical and dental benefits, and continued vesting of his outstanding equity awards.
What protections does Chris Samborski have after a change of control at Martin Marietta (MLM)?
Under an Employment Protection Agreement, a qualifying termination following a change of control provides severance equal to three times his annual compensation, defined as base salary plus the highest annual bonus paid in the prior five years, plus continuation of benefits for 36 months.
What were Chris Samborski’s prior compensation terms at Martin Marietta (MLM)?
Since January 1, 2025, Samborski’s role carried a base salary of $527,258, a target short-term incentive of 90% of base salary, a target long-term incentive of 200% of base salary, and a one-time $2,000,000 restricted stock unit grant vesting over three to five years.
What experience does Chris Samborski bring to the COO role at Martin Marietta (MLM)?
Samborski has led Martin Marietta’s West and Specialties Divisions and previously served as Vice President of Strategic Finance, Procurement and Supply Chain. Before joining the company, he held leadership roles at Caterpillar Inc. and Johnson & Johnson and completed GE’s Operations Management Leadership Program.