NISA Investment Advisors
| Company type | Private |
|---|---|
| Industry | Asset management |
| Founded | 1994 |
| Founder | Jess Yawitz, Bill Marshall |
| Headquarters | Clayton, Missouri , United States |
Key people | David Eichhorn (CEO) |
| Products | Investment management |
Number of employees | 400+ (2025) |
NISA Investment Advisors (NISA) is a United States-based asset management company with its main office located in Clayton, Missouri.
History
The roots of NISA trace back to National Investment Services of America, an investment firm originally situated in Milwaukee. In 1994, the company divided into three separate organizations, leading Jess Yawitz and Bill Marshall—both former faculty members at Olin Business School and former Goldman Sachs professionals—to establish NISA Investment Advisors. Starting out with 20 staff members and managing $3.9 billion in assets, the firm initially operated from Milwaukee before moving its headquarters to Clayton.
In 2017, Yawitz and Marshall transferred ownership to senior management and subsequently retired by 2021. David Eichhorn, who joined the firm in 1999, took over as CEO. As of September 2025, NISA oversaw $460 billion in assets and employed more than 400 personnel.
In April 2025, the company broadened its investment capabilities by incorporating a quantitative investing team responsible for a new quantitative equity approach. The firm continues to be fully employee-owned.