Arm, a Nasdaq and London-listed chip maker, and the long-term corporate venturing unit of mutual fund manager Fidelity International have reinvested in UK-based smart grid company Amantys.

Moonray Investors, which invests using Fidelity’s balance sheet to look for long-term investments in clean-tech and healthcare, and Arm invested $8m in Amantys’ series B round, following their $7m investment in July last year.

Intellectual property fund manager IP Group joined Amantys’ founders in a $1m seed round in 2010, news provider EE Times said, but was bought out by Moonray in the A round.

Amantys has patented technology to reduce size and power consumption of power-switching devices used in high voltage motor drives and renewable energy systems.

Nicky McCabe, chief operating officer at Moonray Investors, said: “We have continued to be really impressed with the success that Amantys has achieved over the last year, bringing new and disruptive products to market. This…

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