The consulting firm Capgemini warned wealth managers Wednesday that under-40 high-net-worth individuals are exceedingly willing to dump one financial advisor for another when they feel their needs aren’t being met.

Those needs include sophisticated financial planning services and global investing, according to the firm’s 2015 United States Wealth Report, which defined high-net-worth individuals as people having more than $1 million in investable assets excluding primary residence, consumables and collectibles.

The under-40s are also after diverse specialties to handle their portfolios. Capgemini noted 48.5 percent of the younger wealthy have relationships with five or more firms, compared to 9 percent for their older peers.

Since bear markets (notably the 2008 financial crisis and the dotcom bubble) have been more pronounced during the under-40s' investing lives, the younger well-to-do have fewer assets in equities than older investors (27 percent versus 35.3 percent).

The money younger people are investing seems to be going to real estate, alternative investments and global opportunities, said Capgemini.

Overall, the report said high-net-worth individuals increased by 8.6 percent last year to 4.4 million.

Of 12 major U.S. cities, Houston had the highest growth at 14 percent and Chicago, the least with 6.7 percent.

Wealthy individuals are willing to hand over $1.5 trillion to robo-advisors by 2017, said the study.

During the year the truly rich (those with over $30 million in assets) did get richer as they came to control 28.3 percent of the wealth of high-net-worth individuals although they accounted for 1.2 percent of their number.

For the report, 1,085 high-net-worth individuals were surveyed.