T. Rowe Price Group Inc. now has a 10.2% stake in Tesla Inc., according to a Securities and Exchange Commission filing on Oct. 10.

The asset management firm upped its shares in the electric-car company to 17.4 million as of Sept. 30, according to the filing.

T. Rowe Price previously had a 6.9% stake in Tesla, according to data from S&P Global Market Intelligence.

The SEC requires parties to report ownership of a stock that is more than 5% of a company's total stock.