Gerber owns over 2, units of Blackrock stock worth over $,, and over the last 20 years he sold BLK stock. Go see the world with Go Next, a leader in alumni and group travel. Milhão dollars as of 1 August Mr. . Go see the world with Go Next, a leader in alumni and group travel. Milhão dollars as of 1 August Mr. Gerber owns over 2, units of Blackrock stock worth over $,, and over the last 20 years he sold BLK stock. Book your next cruise or land program with Go Next! Go Next. Milhão dollars as of 1 August Mr. Go see the world with Go Next, a leader in alumni and group travel. Book your next cruise or land program with Go Next! Go Next. Book your next cruise or land program with Go Next! Go Next. Gerber owns over 2, units of Blackrock stock worth over $,, and over the last 20 years he sold BLK stock.