Keroche Breweries CEO Tabitha Karanja is the Nakuru United Democratic Alliance (UDA) candidate for the August 9 General election.
The Keroche boss was declared the winner after garnering 98,439 votes. Mr Gichanga Daniel came second with 12,240 votes ahead of Mr Andrew Yatich (8,043) and Mr Ndirangu James Mukami who got 5,303votes.
She expressed confidence in delivering the senate seat to the UDA party.
"With the support of our people and the party I am ready to face my competitors from the other parties and I am sure to deliver the seat," said Ms Karanja.
The losers, who had earlier claimed that the results were manipulated, later conceded defeat.
Mr Andrew Yatich came third in the senatorial race had earlier in the day rejected the results which claimed had been rigged in favour of Ms Karanja.
He however, promised to support the party and work with Ms Karanja.
Nakuru Woman Representative Liza Chelule also won the UDA party ticket after garnering 86,344 votes against her main opponent Jenniffer Kajuju who got 56022 votes.
Ms Flora Kiprop came third with 25,955 votes.
The two were issued with the provisional nomination certificates after the tallying of results from the 11 constituencies in the county.
Ms Chelule thanked the voters and asked those she defeated to support her as she seeks to deliver the seat to the party.
"I want to thank my two sisters for conceding defeat and accepting to walk with us in this journey. I also ask them for their support and I promise to hold their hands in their political journeys," said Ms Chelule.
County Returning Officer Joshua Murgor said the nominations were conducted in a free fare and transparent manner.