<p>CVC is selling German metering and energy management group Ista, which could be worth up to 4 billion euros ($4.3 billion), sources told Reuters on Tuesday.</p>
<p>The buyout group, which bought Ista in 2013 at a valuation of 3.1 billion euros, plans to send out preliminary information packs on the company around Easter. This will set in motion what could become the largest sale of a private equity portfolio company in Germany this year, they added.</p>