Jeremy Cobyn has drummed up more than double the amount of campaign donations than his sole Labour leadership rival Owen Smith, according to the latest Register of Interests.
The filings show Corbyn raked in over £188,000 ($250,369) in cash donations and loans, while Smith attracted around £83,000.
The Labour leader's donations included two "interest free, unsecured" loans from the Unite union worth £75,000, while the RMT donated £25,000 and the Fire Brigades Union donated another £15,000.
The TSSA Union, which is close to the pro-Corbyn pressure group Momentum, seconded staff at a value of more than £7,800 to the left-winger's campaign.
Matt Wrack, the general secretary of the Fire Brigades Union, gave his ally £7,000 towards his campaign.
Smith's largest donor, in contrast, was Labour's business czar Anthony Watson. The former Nike and Barclays executive donated rental, phone and internet costs of an office, which was valued at more than £67,000.
Smith does have union backers, including the 622,000 strong general workers' union GMB, shop workers' union Usdaw, steelworkers' union Community and the Musicians' Union.
With less than a fortnight to go before the winner of the leadership election is announced on 24 September, IBTimes UK asked GMB, Usdaw and Community if they were planning to donate to Smith's campaign. We had no response at the time of reporting.