<span style="line-height: 20.8px;">Private equity firm</span><span style="line-height: 20.8px;">&nbsp;Vista Equity Partners Management LLC</span><span style="line-height: 20.8px;">&nbsp;is exploring a sale of&nbsp;</span><span style="line-height: 20.8px;">Aptean Inc</span><span style="line-height: 20.8px;">, hoping a deal will value the U.S. business software company at more than $1 billion, including debt, according to people familiar with the matter.</span>