ArcLight Capital Partners, an US private equity and venture capital firm, has disclosed that its Energy Partners Fund VI has surpassed US$5 billion in sales.

The fund is to focus on North American investments in electric transmission, production of oil and natural gas, terminals, storage, and pipelines.

With an initial target of US$4 billion, the fund has now raised a little over US$5.266 billion from roughly 203 investors according to a US Securities & Exchange Commission filing.

ArcLight started raising money for the fund towards the end of last year, registering approximately US$1.5 billion in capital commitments in December 2014. The firm has yet to disclose its intentions as to whether or not it will keep raising capital for the fund.

ArcLight is a private equity firm specializing in buyout investments in the energy sector. The firm primarily invests in companies based in North America, Western Europe, Australia, and New Zealand. It typically invests between $10 million and $300 million in its portfolio companies.