London Stock Exchange Group reported higher quarterly income as its clearing and FTSE Russell index compiling businesses grew strongly.
The LSE also added that it was exploring investments to drive growth after the collapse of its proposed Deutsche Boerse merger.
Helped by a weak sterling, LSE reported a 19% rise in total income from continuing operations to £458.7m for the quarter ended March 31.
It added that comparable revenue was up 18% at £420.6m.
Analysts on an average had expected income of £448.5m and revenue of £411.6m, according to a company-compiled consensus.
The results come just under a month after EU regulators blocked LSE's planned merger with Deutsche Boerse, citing concerns over a potential monopoly in the processing of bond trades.
The failure of LSE's third attempt to combine with Deutsche Boerse has reignited speculation that an overseas exchange may make a fresh bid for the British firm, with NYSE-owner ICE having briefly expressed interest last year.
The industry has been trying to consolidate for years amid weaker trading volumes and shrinking margins, but regulatory concerns, along with nationalist wrangling, have hindered many cross-border deals.
"The group has made a strong start to the year. We continue to be actively engaged in exploring selective ongoing organic and inorganic investments in order to drive further growth," LSE's chief executive Xavier Rolet said.
The company, which owns Borsa Italiana and the London Stock Exchange, said it was well placed to benefit from the introduction of MiFID II, new rules that are aimed to make European securities markets more transparent.