Northwestern Mutual Investment Services operates as a brokerage firm and investment advisor, offering securities trading, investment banking, and financial advisory services across the United States. The firm's investment focus spans various stages, from pre-seed to later-stage rounds, with a particular emphasis on early-stage investments in fintech, insurtech, and wellness sectors.

Notable portfolio companies include Betterment, a leading robo-advisor platform, and Vestwell, a digital retirement platform. Northwestern Mutual's investment philosophy emphasizes holistic financial planning, tailoring solutions to individual client goals. The firm leverages its extensive experience in financial services to provide value-added support to its portfolio companies, helping them navigate the complexities of the financial industry.