Midstate sees mammoth number of mergers, acquisitions in 2006

REGION

Here's a roundup of top firms, deals

Three companies were especially busy dealmakers in 2006. Armstrong World Industries Inc.'s emergence from bankruptcy protection in October capped a busy year for the Lancaster County manufacturer. Cumberland County-based Harsco Corp. landed at least 23 contracts worth a total of about $300 million for its industrial-services work. And Hersha Hospitality Trust, a Harrisburg-based owner and manager of hotels nationwide, aggressively added to its portfolio of properties.

Here's a recap of their doings throughout last year.

Armstrong

Armstrong World Industries, a Manor Township-based maker of floors, ceilings and …