AP4, Stockholm, committed 900 million Swedish kronor ($108.4 million) to Infranode's first strategy, said a spokesman for the pension fund.
The 348 billion kronor pension fund made the commitment at the end of September, the spokesman added.
The Nordic infrastructure fund was closed at 4.45 billion kronor and has so far made two investments in Sweden and one in Norway.
Infranode can take ownership stakes of between 10% and 100%. As well as traditional ownership Infranode, may also engage in time-limited ownership through a concession or possible repurchase, said a news release on the firm's website.
The strategy invests in both existing infrastructure and new construction projects. All investments are long-term ownership with a 25-year horizon.
"Infrastructure is a suitable investment for a long-term investor such as AP4, with the potential to provide needed capital to sustainable investments with an expected long-term stable real return," the AP4 spokesman said in an email.
