${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{a}re\text{p}\text{r}\text{i}\text{v}\text{a}\text{t}\text{e}\text{i}\text{n}\text{d}\text{i}\text{v}\text{i}\text{d}\text{u}\text{a}\text{l}\text{s}\text{w}\text{h}\text{o}\text{i}\text{n}\text{v}\text{e}\text{s}\text{t}\text{t}\text{h}\text{e}\text{i}\text{r}\text{o}\text{w}\text{n}\text{m}\text{o}\text{n}\text{e}\text{y}in\text{p}\text{o}\text{t}\text{e}\text{n}\text{t}\text{i}\text{a}\text{l}\text{l}\text{y}\text{h}\text{o}\text{t}\text{n}\text{e}\text{w}\text{c}\text{o}\text{m}\text{p}\text{a}\text{n}\text{i}\text{e}\text{s}\text{b}\text{e}\text{f}\text{o}\text{r}\text{e}\text{t}\text{h}\text{e}\text{s}\text{e}\text{f}\text{i}\text{r}\text{m}\text{s}\text{b}\text{e}\text{c}\text{o}\text{m}\text{e}\text{l}\text{a}\text{r}\text{g}\text{e}\text{r}\text{,}\text{p}\text{u}\text{b}\text{l}\text{i}\text{c}\text{l}\text{y}\text{t}\text{r}\text{a}\text{d}\text{e}\text{d}\text{c}\text{o}\text{m}\text{p}\text{a}\text{n}\text{i}\text{e}\text{s}\text{.}}$

${?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}$ are private individuals who invest their own money $in$ potentially hot new companies before these firms become larger, publicly traded companies.

Venture investors

Corporate raider investors

Angel investors

Leveraged buyout specialists