** Shares of U.S. bank Investar Holding ISTR.O rise 5% to $21.45
** Piper Sandler raises PT on ISTR to $27 from $22
** ISTR's acquisition of Wichita Falls Bancshares expands its footprint in Texas, increasing its asset exposure and marking its entry into the North Dallas market - Piper
** Deal enhances ISTR's scale and geographic diversification, positioning it for continued growth in a high-potential region while preserving its community banking model - brokerage
** ISTR said on Tuesday it would buy Wichita Falls Bancshares in a deal valued at $83.6 million
** Up to last close, ISTR down 7% YTD
(Reporting by Juby Babu in Mexico City)
((Juby.Babu@thomsonreuters.com;))