Mazda is aiming for 25% growth in fleet sales in 2015/16.
The company believes its model range is key to the growth, with the Mazda CX-3, which will take the brand into the small SUV sector for the first time, launching this summer.
The new Mazda2, which is expected to attract demand from public sector fleets and employees opting for company cars through salary sacrifice schemes, launched earlier in spring, with continuing corporate demand for the Mazda3.
In the 12 months to March 31, 2015, Mazda fleet sales totalled 11,876, up 43% on the prior year's 8,319 units.
In the last three years Mazda has seen fleet sales as a share of April to March financial year total new car volumes rise from 16% in 2012/13 to 23% in 2013/14 and 30% in 2014/15.
Head of fleet Steve Tomlinson said: "The launch of the all-new Mazda2 and Mazda CX-3 coupled with rip-roaring success of the Mazda3 and further enhancements to the Mazda6 and Mazda CX-5, which have both been long-time fleet favourites, gives the brand a powerful model line-up in the corporate sector. I am confident that we will see a further major increase in fleet sales in 2015/16, potentially a 25% increase."