Dara Khosrowshahi, CEO of Uber speaking at the 2018 WEF in Davos, Switzerland on Jan. 23rd, 2018.

Alphabet reported the total book value of its equity investments for the first time on Monday, revealing that it has gained about $3 billion on its investments in Uber and other companies. It also showed that smart home division Nest is losing money on annual revenues that are below $1 billion.

Alphabet reported quarterly earnings after the bell on Monday, the first quarter of a new reporting format that gave investors new insights into the business.

The company made two key changes: The company disclosed "gain on equity securities," and moved Nest from its "Other Bets" segment to its "Google" segment.