Jan M. Twardowski first led the portfolio-management effort for Vanguard's original index fund.

Format Web Page

"Jan M. Twardowski first led the portfolio-management effort for Vanguard’s original index fund."

Vanguard's own history confirms Twardowski's role in putting the original index-fund concept into operation.

Source title 50 years. 50 facts. Indexing since 1976.

Source authors Vanguard

Source year 2026

Confidence high

Importance high