SAN FRANCISCO — Google turned 18 years old in September and there are signs that as it gets older it is learning to be responsible with its money.

A year ago, Google reorganized to create Alphabet, a holding company housing the search giant and a growing list of fledgling businesses, ranging from Nest, a home electronics maker, to a life sciences outfit called Verily.

By making Google one of Alphabet’s subsidiaries — albeit the one responsible for most of its revenue — it put pressure on the company’s “other bets” to prove that they can stand on their own financial feet.

On Thursday, Alphabet reported third-quarter results that provided evidence of that new interest in watching where the money goes. Alphabet said quarterly revenue from “other bets” rose 40 percent to $197 million, while operating losses narrowed to $865 million from $980 million a year ago.