https://www.cnbc.com/2018/09/28/sec-says-elon-musk-at-tesla-chose-420-price-as-pot-reference.html

Tesla CEO Elon Musk picked $420 as the share price for possibly taking the company private in August because it is a reference to pot culture, the Securities and Exchange Commission (SEC) alleged on Thursday during a news conference.

The SEC has sued Musk for fraud, charging the Tesla chief with making "false and misleading tweets," and for failing to properly notify regulators of material company events.