The Tories, led by Prime Minister Boris Johnson, received £5.7 million in the week after Nov 6 – representing 87% of donations over £7,500.
The anti-Brexit Liberal Democrats were the next largest recipients, garnering £275,000, followed by arch-eurosceptic Nigel Farage’s Brexit Party on £250,000.
The Labour Party received £218,500 in big donations during the seven-day period, while the Green Party got £30,000.
The figures were revealed in the first of several weekly reports released by the Electoral Commission – an independent body which oversees elections and regulates political finance – before the Dec 12 vote.
They showed those giving to the Conservative Party included controversial banker Lubov Chernukhin, the wife of a former ally of Russian President Vladimir Putin, who donated £200,000.
Chernukhin, a British citizen, stoked controversy earlier this year after giving the party £135,000 to have dinner with then-prime minister Theresa May and other ministers.
She has now given the Tories more than £1.4 million since 2012, according to Electoral Commission records.
Her inclusion on the latest donors list could cause political headaches for the Conservatives, after the government this month delayed the publication of a parliamentary report into possible Russian interference in British politics.
Johnson defended the move, which has prompted widespread criticism and concern, on Wednesday.
“There’s absolutely no evidence that I’ve ever seen of any Russian interference in UK democratic processes,” he said during a campaign stop in Teesside, northeast England.
The biggest donation to his party came from billionaire theatre impresario John Gore, who made his fortune from staging musicals such as “Hamilton”, “Wicked” and “School of Rock”. He gave £1 million.
Countywide Developments, run by billionaire property mogul Tony Gallagher, gave £500,000.
The biggest donation to the Labour Party came from the trade union Unite, which gave £62,000.
The smaller Lib Dems’ major donor was an investment bank, Attestor Services, which gave £75,000.
Jeremy Hoskins, an English businessman who made his money in investment and private equity, was the sole contributor to the Brexit Party.
Labour immediately criticised the figures, noting its average donation was £26 and that it had raised more than £1 million in “small donations” in the 10 days after the election was called last month.
At the party’s manifesto launch Thursday leader Jeremy Corbyn accused “billionaires and the super-rich” of owning the Conservative Party and that he expected their opposition to his policies.