The biggest bank owner based in the Charleston region and the third largest headquartered in South Carolina will release its first-quarter earnings today.

It’s been an eventful month or so for First Financial Holdings Inc. In late March, the U.S. Treasury Department sold at a loss the stock its owned in the parent of First Federal of Charleston. The agency acquired the preferred shares in 2008 for $65 million under its Troubled Asset Relief Program.

After the first quarter closed, North Charleston-based First Financial Holdings extended its reach down the South Carolina coast by completing its previously announced purchase of five former Liberty Savings Bank branches in the Hilton Head Island market.

Today’s earnings report is due out before U.S. stock markets open.