The Central Electoral Commission (CEC) updated the results after finishing counting the votes of Lithuanian citizens who voted abroad on Monday.
The final results published by the election watchdog show MP Simonyte, the candidate of the conservative Homeland Union–Lithuanian Christian Democrats, coming first with 31.21 percent of the vote and independent economist Nauseda second with 30.93 percent.
The two front-running candidates will face each other in the May 26 runoff.
Prime Minister Saulius Skvernelis, the candidate of the ruling Lithuanian Farmers and Greens Union (LFGU), finished third with 19.67 percent.
Social Democratic European Commissioner Vytenis Andriukaitis came fourth with 4.79 percent, followed closely by philosopher Arvydas Juozaitis in fifth place with 4.69 percent.
Further down the list was Valdemar Tomasevski, a member of the European Parliament and the leader of the Electoral Action of Poles in Lithuania – Christian Families Alliance, with 3.98 percent, MP Mindaugas Puidokas with 2.58 percent, MP Naglis Puteikis with 0.79 percent, and MEP Valentinas Mazuronis with 0.65 percent.
A total of 41,767 citizens cast their ballots at Lithuania's diplomatic missions abroad. The final election results can still change negligibly after the votes of those who voted by post abroad come in.