A leading Aberdeen businessman donated more than £200,000 to Labour last year, records show.
Alan Massie, director of city-based developer Carlton Rock, is a known backer of the party and is listed as having boosted its coffers with 13 donations since 2011.
Figures from the Electoral Commission revealed yesterday that the level of his support increased significantly in 2014.
He is shown to have handed Scottish Labour £52,000 in February last year, £100,000 in September and £2,400 in November, as well as making a £52,000 donation to the central party in October.
The records detail total donations of £257,168 to Labour since 2011. Mr Massie also gave £15,000 to the Liberal Democrats in 2006-07.
The UK parliament’s register of financial interests also shows that Mr Massie gave £14,500 to Jim Murphy’s successful bid to lead Scottish Labour.
Last year the developer dropped a civil suit against Aberdeen SNP councillor Callum McCaig after receiving an “unreserved” apology for Mr McCaig’s suggestion in a press release that an £11,500 donation made by Mr Massie to the Gordon constituency Labour party led to a conflict of interest.
Records published yesterday also show north-east oil tycoon Ian Suttie’s wife Dorothy gave £8,000 to the Conservative Party in November.
Mr Suttie is one of Scotland’s richest men and a former Liberal Democrat donor.
Neither he nor Mr Massie returned the Press and Journal’s calls.
The Electoral Commission database also shows that Skene Investments (Aberdeen) Ltd made three donations to the Conservative Party last year, worth a total of £26,132.
It also made two donations of £3,000 to the Aberdeen South branch of the Tories in 2013.
City hotelier Charles Skene is the founder and chairman of Skene Investments, and previously donated money to Labour and the Liberal Democrats between 2004 and 2007.
Meanwhile, the Lib Dem Aberdeenshire East branch, where the party is aiming to fend off Alex Salmond’s bid to take the Gordon seat in May, the party received a £10,000 donation from party official Duncan Greenland in November, and £2,000 from a Jane Mactaggart in December.
The financial register at Westminster shows that fellow Lib Dem and chief Treasury secretary Danny Alexander recently updated his records to include a private donation of £5,000 from Paul Donovan, and £5,000 from Inverness-based accountants Speyfield Ltd.
The Press and Journal revealed in December that Mr Alexander received two £25,000 donations from Inverness-based Orion Engineering Services, run by former Inverness Caledonian Thistle chairman Alan Savage.