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The answer is in the article... the remaining contenders are General Electric and Pratt & Whitney

Yeah, that's the other two.

Supersonic jet engines are a rarified field. There are Russian "companies"... good luck getting that certified for Western commercial aviation.

Dude when the sanctions end the sanctions will really really end.

Russia couldn't get any of their civil aviation jets certified before the sanctions.

Russia got the Sukhoi Superjet 100 regional airliner certified in Europe in 2012 (before the sanctions).

https://www.easa.europa.eu/en/newsroom-and-events/press-rele...

SSJ 100 was certified to operate in Europe in 2012. How much of SSJ 100 is Russian is another question.

Irkut MC-21 had its first flight in 2017 and was supposed to get certified somewhere around 2025, which is pretty normal period, I think? Obviously, not going to happen now.

What about CFM or Safran?

CFM hasn't ever developed a supersonic engine. Safran's one military turbofan is an 80's non-supercruise design. It would be a long way to go for either of these outfits to produce an entirely new supercruise turbofan.

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