Elon Musk, the CEO of SpaceX, finds himself at the center of controversy following a series of tweets concerning the ongoing conflict in Ukraine. On Sunday, Musk tweeted, “Be quiet, small man,” a comment that followed his bold assertion about Starlink’s critical role in Ukraine’s defense.

SpaceX will 'never turn off' Starlink terminals in Ukraine, Musk says. But after a Polish minister speculated that Europe would need to find 'other suppliers,' he responded: 'Be quiet, small man.'

Shares of French satellite operator Eutelsat Communications (EPA:ETL) soared 387 percent last week, driven by speculation that the company could replace Elon Musk’s Starlink as Ukraine’s primary satellite internet provider.

EU officials are in talks with four European satellite firms about providing a back-up service for Starlink in Ukraine.