Builders FirstSource Inc., a Dallas-based maker of materials for new homes, rose the most on record after saying it agreed to buy competitor ProBuild Holdings LLC in a deal valued at $1.63 billion.

ProBuild, based in Denver, operates about 400 lumber and building product distribution, manufacturing and assembly centers serving 40 U.S. states, according to a statement Monday. The companies had 2014 combined revenue of $6.1 billion.

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