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U.S.: retirement assets in 401(k) plans 2021 | Statista

The value of retirement assets in 401 (k) plans in the United States grew overall during the period from 2000 to 2021, reaching a value of around 7.26 trillion U.S. dollars as of the end of second quarter 2021. Most of the 401 (k) plan assets were invested in mutual funds.