Arnold on Friday resigned the account of PNC Bank after taking on additional work from Citizens Bank, an agency representative said.
Pittsburgh-based PNC, handled by Arnold's McLean, Va., office, spent more than $30 million on ads last year, per CMR.
PNC executives could not immediately be reached for comment. The bank had been an Arnold client for two years.
Arnold's offices in McLean and Philadelphia will now service an expanded Citizens account that will include Pennsylvania, New Jersey and Delaware.
The Citizens account is expanding owing to the bank's pending acquisition of the retail operations of Mellon Bank of Pittsburgh, which will create a conflict with PNC, the agency representative said. Mellon spent about $8 million on ads last year. The client has recently worked with MARC of Pittsburgh, which did not return calls.
"We're committed to growing with Citizens," the representative said. The bank spent less than $7 million on ads last year through former agency Holland Mark, Boston. However, Citizens switched to Arnold as the year began and sources have said the business is likely to top $40 million by year's end. Mark retains corporate branding for Melon Financial Corp.