Twitter's New Brand: X
In case you haven't noticed, Twitter's bluebird logo was replaced yesterday by an ubiquitous X.

Close to 900 U.S. trademark registrations are recorded on “X” throughout a wide range of industries. Within the tech sphere, Microsoft has a trademark on “X” because of its Xbox system branding. The company has owned that trademark since 2003. And Meta also owns a trademark on an “X” logo for software and social media.
https://gizmodo.com/meta-microsoft-own-x-trademarks-over-elon-musk-1850673517

