Millionaire households in the U.S. finally succeeded last year in clambering past the 2007 prerecession high of 9.2 million to 9.6 million households, Spectrem reported Thursday.
This was an increase of some 600,000 from 2012.
The number of millionaire households, in terms of net worth excluding primary residence, had been creeping up since 2008, Spectrem noted in its Affluent Market Insights Report 2014.
The new report was based on monthly online research Spectrem conducted with more than 12,000 investors with net worth of at least $100,000 not including primary residence.
It showed that all wealth segments experienced large increases from 2012 to 2013.
Mass-affluent households, with a net worth between $100,000 and $1 million, grew to 29 million, an increase of 500,000 investors over 2012.
Households with a net worth between $1 million and $5 million reached 8.4 million, 440,000 more than in 2012.
Ultrahigh-net-worth households, with a net worth between $5 million and $25 million, reached 1.1 million, an increase of 85,000 since 2012.