Sheffield Forgemasters has reportedly been pressured to sever ties with its Russian associates by the UK government.
The government requested that the defence contractor end an energy contract with Russian state energy producer Gazprom.
The firm has been in business with Gazprom since 2013, with a deal which allowed the UK defence company to purchase gas several years in advance at decreased prices.
The company is owned by the Ministry of Defence, and supplies components for the Trident submarine initiative.
The UK government has not yet levelled sanctions against Russia gas, and reported that it is “exploring options” to end British reliance on the country’s energy reserves.
“We can confirm that Sheffield Foregemasters has ceased all product supply into Russia and as global energy markets react to the Russian invasion of Ukraine, the board is reviewing its energy supply as a matter of urgency,” said CFO Steve Hammell.