Sydney Airport operator Macquarie Airports (MAp) says it will focus on its existing portfolio, rather than new acquisitions over in the next six months after reporting a strong profit.

"Our focus over the next six months is going to be continuing to focus on the existing portfolio," MAp chief executive Kerrie Mather said.

MAp, the world's second biggest publicly traded airport owner, today reported a 29.5 per cent increase in first half net profit to AU$203.68 million for 2006.

The company will focus on continuing to integrate Copenhagen airport, in which MAp took a majority stake in December, and the ongoing introduction of commercial initiatives across the portfolio.

But Ms Mather said a good pipeline of opportunities existed.

"Over time, I think there's a good pipeline of opportunities out there in the sector," she said.

"And we will continue to be as selective as we have been to date."

MAp's airport holdings also include Copenhagen, Brussels, Rome and Bristol and Birmingham in the UK.

Its stapled securities were steady at AU$2.95 at 1356 AEST.