The likes of Carl Jenkinson, Aaron Cresswell, Cheikhou Kouyate, Diego Poyet, Alex Song, Morgan Amalfitano, Mauro Zarate, Enner Valencia and Diafra Sakho all arrived as West Ham splashed the cash, and so far, they have been repaid on the field.
Saturday's 2-1 win over Premier League champions Manchester City means that Allardyce's men have racked up five wins from their first nine games this season, and they sit in fifth place having already beaten Liverpool at Upton Park this season too.
Spirits are high around the club right now, and whilst a top 10 finish had previously been the aim of the season, it seems that they may be able to look at an even higher finish after their great start to the campaign.
Yet with the January transfer window drawing ever closer, rumours are already linking West Ham with even more new signings as they look to build on their impressive start - and the latest is a familiar face to recent Hammers signing Amalfitano.
The Frenchman played alongside Ghanaian winger Andre Ayew during his time at Marseille, but with his contract set to expire next summer and the Ligue 1 giants unwilling to pay him £50,000-per-week, it seems that Marcelo Bielsa's men may be willing to let him leave in January in order to get some money for his services rather than lose him for free.
The likes of Chelsea, Everton and Liverpool have also been linked with a move to sign the 24-year-old, who is back on the radar of many big clubs after he impressed for Ghana at this summer's World Cup in Brazil.
However, according to the Daily Mirror, West Ham believe they can gain the upper hand in the pursuit of Ayew, given their relationship with his agent and 'Marseille wheeler-dealer- Willie McKay, who helped the Hammers secure a deal to sign Amalfitano this summer.