Amalgamated Bank (AMAL) shares posted a nearly 5% gain following its public debut on the Nasdaq Thursday.

The bank, which lends to unions and socially responsible organizations for the past 95 years, is profitable and looking forward to the prospect of rising interest rates, said CEO Keith Mestrich. 

"We priced at $15.50 [Wednesday] night, opened at $16, obviously people like our story," Mestrich said.

The stock wrapped up the trading session near $16.30, a gain of 5.1%.

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