PNC Financial Services has announced plans to acquire Colorado-based FirstBank in a $4.1 billion transaction, marking a significant expansion of its footprint in the US retail banking market.Headquartered in Lakewood, Colorado, FirstBank—also known as 1stBank—operates 120 branches and holds $26.7 billion in assets. The lender is privately held, though shareholders owning 45.7% of the company have already voted in favour of the merger, according to a joint disclosure, AP reported.“Its deep retail deposit base, unrivalled branch network in Colorado, growing presence in Arizona, and trusted community relationships make it an ideal partner for PNC,” Bill Demchak, chairman and chief executive officer of PNC, said in a statement.The deal cements PNC as the largest bank in the Denver market while expanding its Arizona network to more than 70 branches. With the acquisition, PNC’s total assets will rise to roughly $575 billion, putting it closer in size to rivals Capital One and US Bank.PNC has been aggressively growing through acquisitions, having purchased the US operations of Spanish lender BBVA for $11.6 billion after the pandemic. The Pittsburgh-based bank has also been adding branches across the Southwest.Alex Overstrom, head of retail at PNC, suggested further growth could follow. “We are not slowing down our organic growth but may consider opportunities as they arise,” he said in an interview.Industry analysts say the deal strengthens PNC’s status as a leading super regional bank, a category that includes lenders like Capital One and Huntington Bancshares. These institutions have been expanding rapidly to compete with Wall Street’s largest players such as JPMorgan Chase, Bank of America and Wells Fargo.