The Welsh government hopes to increase investment in sectors already present in Wales, like semiconductors, creative industries, advanced manufacturing and life sciences.
Evans told BBC Politics Wales that 300 people 250 different businesses spread across 37 different countries would be attending the investment summit.
Guests will sample Welsh cuisine with chef Tom Simmons before a panel discussion on pioneers in sport with Baroness Tanni Grey-Thompson, Richard Parks and Prof Laura McAllister.
Challenged on how the government will measure the success of the summit, Evans said: “There will definitely be opportunities to close deals pretty quickly as a result of the investment summit, but also this is really about creating connections and relationships.
“It takes time to build relationships and trust is really, really important in terms of ensuring that the investors do come to Wales.”
When launching this summit in the Spring, First Minister Eluned Morgan said growing the economy was her “top priority”.
More than 170,000 people in Wales work for companies that are owned overseas, but Morgan told BBC Wales: “I think we can get more of that”.