MLM expects a return to expanding margins in the fourth quarter of 2022 as the compounding effect of multiple pricing actions throughout the year offsets continued inflationary pressure and a slowdown in single-family residential construction. Martin Marietta Materials, Inc. MLM is likely to be a solid bet for 2023 despite inflationary pressure and a slowdown in single-family residential construction. The need to rebuild the nation’s deteriorating roads and bridges is expected to help MLM.