American Century Investments is a privately-run, independent investment management firm. The firm focuses on later-stage investments, typically participating in Series C rounds and other unspecified stages. Their investment approach is characterized by significant capital injections, as evidenced by their involvement in substantial funding rounds.

Notable portfolio companies include ArrayComm, which has raised $34 million, and WR Hambrecht +, with $83 million in total funding. American Century's key partners and decision-makers are not specified, but the firm is known for its robust investment philosophy and commitment to adding value beyond capital.