** Envestnet, a U.S. software vendor with a market value of about $3.5 billion, is exploring options that could include a potential sale after receiving takeover interest, people familiar with the matter said. ** Lufthansa's new remedies on its ITA Airways stake buy are not markedly different from an earlier package rejected by EU antitrust regulators which have also discounted Ryanair as a rival in its scrutiny of the deal, people familiar with the matter said.