MLM MARTIN MARIETTA MATERIALS INC Investments/Divestments 8-K Filing 2023 - Loan Modification Agreement Martin Marietta Materials, Inc. entered into a Loan Modification No. 2 and Extension Agreement with JPMorgan Chase Bank, N.A. to extend the maturity date of their credit facility.Get access to all SEC 8-K filings of the MARTIN MARIETTA MATERIALS INC