It's unclear how many employees could be impacted. Before the merger with Cincinnati-based Fifth Third was officially approved, data from Downtown Dallas Inc. showed Comerica as one of 19 Fortune 1000 companies based in Dallas.
https://www.wfaa.com/article/news/local/dallas-county/comerica-considering-layoffs-merger-fifth-third-bank/287-1581d5b0-8e1a-400a-9c9d-afe1e3938cf9