The ultra-secret world of ultra-wealthy investors is becoming slightly more transparent.

Addepar Inc., whose investors include billionaire Peter Thiel and Palantir Technologies co-founder Joe Lonsdale, is working with hundreds of money managers to give a better sense of where their clients invest. Assets linked to the firm’s technology are growing at an average of $10 billion a week and have reached $1.7 trillion, Addepar Chief Executive Officer Eric Poirier said.


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