One of the most important startups in video games just lost its CFO - right after raising $145 million in new funds

• Mike Foley, the chief financial officer of Unity Technologies, has resigned from the company.
• Unity didn't say why he left, but said it is looking for his replacement.
• His departure came soon after Unity raised $145 million in new funding.

The chief financial officer of Unity Technologies, whose software tools are used to make games and augmented-reality apps, has left the company, Business Insider has learned.

Unity did not offer a reason for his departure, but in an email sent to company employees in June announcing it, company CEO John Riccitiello said it was "friendly and the decision mutual."

"I want to sincerely thank Mike for his many contributions to Unity," Riccitiello said in the email. He continued: "I will certainly miss him."

Unity spokeswoman Amanda Taggart confirmed Foley's resignation and Riccitiello's letter.

"We're actively looking for a CFO replacement and have some great candidates in the mix," she said in an email.

Foley's departure came soon after the company quietly raised some $145 million in new funding. That funding, which the company closed in June, according to Crunchbase, was part of the company's series D round that it began raising last year. It initially raised $250 million as part of that round in May 2017, according to Crunchbase.

In total Unity, whose tools were used to make the popular "Pokémon Go" game, has raised some $601.5 million. In an interview this week with Business Insider, Riccitiello declined to say whether the company is profitable or whether it expects to raise additional funds in the private market on top of the money it raised in June. He also declined to give any timeline for a potential public offering.

"We're thinking of giving serious thought to questions around an IPO and if and when, but saying that we will and putting a time frame on it is not something that guys like me do lightly," he said.