For 27 years, Bill Gates has entrusted the management of his enormous wealth and the endowment of his giant foundation to a single man: Michael Larson.
Mr. Larson has invested the Microsoft co-founder’s money in farmland, hotels, stocks, bonds, even a bowling alley. Thanks in part to Mr. Larson and the soaring value of Microsoft’s shares, Mr. Gates’s fortune has gone from less than $10 billion to about $130 billion.
But Mr. Larson, 61, also engaged in a pattern of workplace misconduct at Mr. Gates’s money-management firm, Cascade Investment, according to 10 former employees as well as others familiar with

)