The money left by Violet Baker led to reports of a family rift, with her sister-in-law claiming the bequest was made out of "spite".
Labour received £3,162,980 in donations over the same period -- including £836,875 from trade union Unite - and the LibDems £1,311,824.
Ukip received donations worth £270,955 in the last three months of 2013, taking their total for the year to £654,162 - more than double the £314,410 received by Nigel Farage's party in 2012.
The Electoral Commission figures show a total of £9,935,682 was donated to political parties in the final quarter of 2013, along with £1,972,750 in public funds.
Movement for Change - the campaigning organisation initiated by former foreign secretary David Miliband - was fined £5500 by the Electoral Commission for accepting donations from Lord David Sainsbury, who was not on the electoral register at the time.
The Blairite campaign group Progress was also fined £6000 for the same breach.