Logistics and freight forwarding company Flexport holds Bitcoin on its balance sheet, its CEO Ryan Petersen revealed in a tweet on Monday.

Responding to a question from Twitter user @21million, who asked Petersen what percentage of the company’s $1.6 billion in net assets is in bitcoin, Petersen tweeted:

“We don’t disclose that but it’s not zero :)”

Founded in 2013, Flexport was recently valued at $8 billion after a $935 million funding round earlier this month. The San Francisco-based company reported $3.3 billion in revenue last year.