London Stock Exchange Group Plc said on Thursday that strong trading over the summer months reinforced its "expectation of an excellent trading performance this financial year".
"The Exchange is thriving as we create increasing value from our world class brand," Chief Executive Clara Furse said in a statement on trading in the five months to end-August that boosted the bourse's attractiveness to suitors.
Takeover talk that has long surrounded the LSE flared up again at the weekend when broker ICAP said it had held merger talks with the British exchange over the summer.
That announcement came days before bidder Nasdaq Stock Markets is allowed to bid again for the LSE.
While the London exchange waits to see how Nasdaq goes forward, it can show the US exchange it remains an attractive partner even after the field of likely suitors shrank when New York Stock Exchange turned its attention to pan-European bourse Euronext.
The LSE said in a statement on Thursday: "Money raised in the primary markets doubled ... as the Exchange again outperformed its competitors in the market for IPOs".
On Wednesday, finance industry data provider Thomson Financial said more money has been raised in IPOs on the LSE so far this year than rivals such as the New York Stock Exchange, Nasdaq and Euronext.