Jeremy Corbyn has secured a majority on Your Party’s new leadership committee following months of infighting.
The former Labour leader has repeatedly clashed with co-founder and fellow ex Labour MP Zarah Sultana since the party began last summer.
Both were elected to the 24-strong central executive committee, it was announced on Thursday.
They are among four elected from Your Party’s office holders such as MPs and councillors, with the other 20 seats taken by ordinary members.
Mr Corbyn's The Many group secured 14 seats against the seven won by Ms Sultana's Grassroots Left slate, giving his supporters control of the CEC.
Some 25,347 people voted in the election out of 40,985 verified Your Party members, a turnout of 61.8 per cent.
Islington North MP Mr Corbyn pledged to work with all members of the party to implement a "bold vision" for the UK.
He said in a statement: "I am delighted that members have voted for a mass, socialist party that takes the fight to Starmer and Farage.
"Now, the real work begins. We have a precious opportunity to unite our movement around a bold vision for this country - one that creates a more caring, equal and peaceful world for all. I look forward to working with all members to make this vision a reality.
"We are at a dangerous moment. The fear, divisiveness and racism of Reform should not be appeased. It must be opposed. There is only one way we will defeat them: by working together under a common cause of redistribution and peace.
"Together, we can provide hope to those who are fed up with inequality, disempowered by poverty and disgusted by war - and build a society that cares for each other and cares for all."
Your Party’s creation has been overshadowed by conflict between Mr Corbyn and Ms Sultana, including over the announcement of its founding and the "unauthorised" launch of a membership portal.
Ms Sultana also boycotted the first day of the party’s founding conference in Liverpool over the exclusion of some of her supporters and the expulsion of members of the Socialist Workers’ Party.
The conference backed the collective membership model, then seen as a victory for Ms Sultana as Mr Corbyn had preferred a single leader.
In a statement, Grassroots Left said it would "work with all those elected who are committed to rebuilding trust by putting the members first and fighting with the branches for accountable, transparent and democratic structures and strong socialist policy choices".
The group added: "Your Party must now work together to become a party of and for the whole left - with no more witch-hunts or stitch-ups.
"All those who have been expelled should be reinstated. We now need a culture of mutual respect, open debate, and a shared focus on the real issues facing us: inequality, insecure work, crumbling public services, fascism, and a political establishment that keeps letting working people down."
Mr Corbyn's "The Many" slate includes the former Labour leader and MPs Shockat Adam and Ayoub Khan, who were both elected to Parliament in 2024 as so-called "Gaza Independents".
Ms Sultana's "Grassroots Left" does not include any other MPs but has also endorsed Mr Corbyn.
