Virgin Media attracted an extra 42,700 broadband subscribers between April and June 2016.
This means the company's overall broadband customer base now stands at more than 4.8 million.
Virgin Media also confirmed in its latest trading statement that the Project Lightning initiative is on course to reach more than 500,000 new UK premises this year.
Some 85,000 premises were added to its ultrafast network in Q2.
Virgin Media hopes the £3 billion network expansion will lead to 17 million homes and businesses in the UK having access to its ultrafast network by 2019.
The upgrades mean households will receive broadband speeds of up to 200Mbps, which Virgin Media says is more than two-and-a-half times faster than the maximum speeds offered by Sky, TalkTalk and BT.
Businesses with ultrafast connections will benefit from speeds of up to 300Mbps. Virgin Media says this is nearly four times faster than the maximum speeds available from its competitors.
Tom Mockridge, Chief Executive of Virgin Media, commented: "More homes and businesses than ever before are voting with their feet and moving to the better quality ultrafast broadband offered by Virgin Media.
"Customers are fed up with the slower broadband offered by providers operating over the ageing national telephone network."
Mr Mockridge added that in areas with Virgin Media, "more customers moved to us during the quarter than BT, Sky, TalkTalk and Vodafone combined".