Infratil Limited is a New Zealand–based infrastructure investment company. It owns renewable energy, digital infrastructure, airports, and healthcare assets with operations in New Zealand, Australia, Asia, the US and Europe. Infratil was founded by the late Lloyd Morrison, a Wellington-based merchant banker. Morrison's company, Morrison & Co is responsible for Infratil's management and administration.

Infratil was one of the world's first listed infrastructure funds when it was established and listed on the New Zealand Exchange in 1994. Its first investment was a minority stake in Trustpower. It expanded into airport ownership in 1998 when it bought a 66% shareholding in Wellington Airport. More recently Infratil has invested into the Digital Infrastructure and Healthcare sectors. Infratil was named Amazon Web Services Company of the Year at the Deloitte Top 200 Awards for 2021. Infratil was also recognised in the IJInvestor awards with APAC Fund Performance of the year. At the 2024 INFINZ Awards Infratil was named Best Investor Relations and won the NZ Equity Market Transaction of the Year for its NZ$750 million Placement and NZ$185 million Upsized Retail Offer. In July 2025 Infratil was added to the S&P/ASX 200 Index.

Over the 10 year period from 1 April 2015 to 31 March 2025, Infratil delivered an average after tax return of 17.0%.

The following companies are either wholly or partially owned by Infratil.