ATLANTA — Wabash National Corp., the nation’s top supplier of trailers, is renewing its trailer and truck body design using advanced composite panels to add strength, increase thermal efficiency and save weight, company executives said.

Trailer maker Wabash National Corp. launched a private offering of $325 million in senior unsecured notes as part of the purchase for the previously announced pending acquisition of truck body builder Supreme Industries Inc.

Trailer maker Wabash National Corp. reported lower net income and revenue for the first quarter amid fewer trailer shipments due primarily to timing issues.

Wabash National Corp., North America’s largest trailer maker, saw fourth-quarter profits and revenue slip compared with the 2015 period. Net income, however, rose for the full year on lower revenue, the company reported Jan. 31.

Wabash National Corp. said the number of fleets committed to testing its new Cold Chain Series refrigerated van trailer made with molded structural composites is now at four with the addition of Leonard’s Express.

Trailer dealership River-Roads Sales & Leasing announced it added new dry van and refrigerated trailers from Wabash National Corp. to its product line.

Trailer manufacturer Wabash National Corp. reported third-quarter net income edged up 3% to $33 million, or 51 cents per share, compared with $32 million, or 47 cents, in the period ended Sept. 30.

Trailer manufacturer Wabash National Corp. reported year-over-year net income rose and revenue fell in the third quarter.

Trailer maker Wabash National Corp. reached an agreement with EconCore N.V., for the exclusive rights to manufacture and sell certain EconCore honeycomb sandwich material configurations in the containment and transportation industries in the United States, Canada and Mexico.