Taking advantage of their success in early-stage technology investing, venture firms FirstMark Capital and Atomico each raised new funds, according to a report by Reuters.

FirstMark Capital is a venture capital firm based in New York, whereas Atomico is headquatered in London and has offices in China, Japan, Turkey and Brazil.

According to Reuters, FirstMark Capital raised a new venture fund of USD225 million, its third and barely a year after it raised another fund of about the same size. It has been reputed for investments in media, adtech, gaming and mobile start-ups including USD2.5 billion sharing website Pintrest.

Meanwhile, Atomico raised USD476.6 million for its third fund, based on a filing with the Securities and Exchange Commission last week. Atomico was created by Skype co-founder Niklas Zennstrom in 2006. It has invested in companies such as mobile game Angry Birds creator Rovio and Up Fitness Tracker maker Jawbone.

Atomico's last fund totaling USD165 million was announced in 2010, Reuters said.