According to Ballotpedia, subsidiaries of the Canadian National Railway Company lost their initial court battles, with both a district court and, later, an appellate court, ruling that the stock options are taxable under the U.S. Tax Act.
However, the ruling made Wednesday by the Supreme Court has confirmed stocks do not count as "money remuneration" and the case should be "remanded for further proceedings consistent with this opinion," according to majority opinion issued Thursday.
[source] https://www.coindesk.com/bitcoin-gets-shoutout-us-supreme-court-opinion/