Total U.S. retirement assets hit $24.9 trillion by the end of March, up 1.3 percent from the end of last year, according to the most recent data from the Investment Company Institute.
All told, retirement assets account for 36 percent of household financial assets in the country.
Total assets are more than double what they were in 2000 and up from $18 trillion in 2007.
IRAs account for the greatest share of assets at $7.6 trillion, a significant recovery from the $3.7 trillion they held in 2008, in the wake of the financial crisis.
Defined contribution plans hold $6.8 trillion, $4.7 trillion of which were in 401(k) plans. Mutual funds managed $3.8 trillion, or 56 percent of those assets.
Mutual funds also managed about $3.6 trillion of IRA assets, or less than half the total accounts’ value. The proportion of total DC assets to IRA assets has held steady since 2012.