The coldest months are producing some of the hottest action at construction supply companies nationwide, with several significant changes on the LBM landscape:

ProBuild named Robert Marchbank, the former head of Wolseley's European operations, to become its new CEO. The nation's No. 2 LBM operation has been without a fulltime chief since Bill Myrick stepped down last July after just a year on the job. Fred Marino, the vice chairman of the company's board of directors, has served as CEO of the Denver-based company in the interim. Also recently, ProBuild named Don Riley executive vice president of supply chain and technology.

Allied Building Products, fourth on the ProSales 100, purchased the assets of United Products Corp., a roofing material and siding distributor with 15 branches in the Upper Midwest. Allied, a division of Oldcastle, the North American holding company for Ireland's CRH, also was busy in both November and December as the company gained eight facilities through three deals.

Roofing Supply Group (No. 8 on the list), a Dallas-based roofing supply dealer, acquired Intermountain Supply, a roofing supply dealer with locations in Seattle and Spokane, Wash.

Carter Lumber (No. 11) purchased the assets of No. 14 US LBM's Indianapolis market unit, Hall & House. Carter Lumber's chief operating officer, Jeff Donley, says the company views the acquisition as a way to increase its presence in Indianapolis, as well as continue its investment in major cities in the Midwest. "It fits right in the middle of Carterland," Donley says.

Mead Lumber (No. 25), bought Dakota Craft Inc's Cheyenne, Wyo.-based Truss Craft division. It's Mead's third acquisition over the past six months following the company's purchase of four Fullerton Companies locations in October and its Knecht Home Center division's acquisition of Sonny's Ace Hardware in Colorado in August.

Joe Torrisi, Al Torrisi, Jay Torrisi, Mark Torrisi
Joe Torrisi, Al Torrisi, Jay Torrisi, Mark Torrisi

Jackson Lumber & Millwork (No. 56) named a new executive team in conjunction with the retirement of longtime president and CEO Al Torrisi after 29 years at the helm of the Lawrence, Mass.-based dealer. Sons Mark Torrisi and Jay Torrisi will serve as president and CEO/treasurer, respectively, while nephew Joseph Torrisi will become executive vice president.

Keep an eye on Central Retail Network Group, a seven-month-old business created by LBM executives from Home Hardware and the Marvin's store chain. First, Central bought Morrison Terrebonne Lumber Center, a dealer in Houma, La. Then it acquired NFL Building Center, based in Daphne, Ala. This April, Central plans to reopen NFL's Gulf Shores, Ala., location, which was mothballed in October 2010.