Private-equity firm ArcLight Capital Partners LLC closed ArcLight Energy Partners Fund VI LP, its latest fund.

The fund closed with $5.575 billion in commitments, exceeding its $4 billion target and initial $5 billion hard cap. ArcLight's previous fund closed in 2011 with $3.3 billion of commitments. ArcLight has now raised more than $15 billion globally since it was founded in 2001.

"We are grateful for the support we've received from both our existing and new limited partners who share our view that today's energy landscape presents a highly attractive opportunity," said Daniel Revers, ArcLight's managing partner and co-founder.

ArcLight is led by seven partners including Revers. Fundraising was managed by the firm's investor relations team of Matt Nelson, Ross Murphy, and Ashley Nahmias.

"The North American energy market is experiencing a once-in-a-generation transformation that is bringing unprecedented change across the entire energy complex. We believe the insights, networks, and resources we've developed over the past 15 years across diverse market cycles will help ArcLight Fund VI take advantage of a particularly exciting and complex environment," Revers added.

ArcLight Capital Partners LLC is based in Boston.