Thanathorn Jungroongruangkit, 40, is accused of not giving up his shares in the V-Luck Media Company before registering his candidacy.
The decision came a few days after Thanathorn was named party-list MP in the March 24 election and registered in Parliament.
EC launched an investigation into Thanathorn’s business activities after activist Srisuwan Janya filed a motion with the commission asking it to disqualify the politician.
Section 42(3) of the MPs Election Act prohibits an election candidate from being a proprietor or shareholder of a media company.
The new party, which debuted at the national general elections, officially won 80 party-list seats.