This chapter begins by highlighting the fact that common stock transactions have historically been a substantial portion of all completed Private Investment in Public Equities (PIPEs), accounting for over 7,100 offerings aggregating over $148 billion in dollar volume equaling 58 percent of all transactions and 42 percent of aggregate dollar volume over the last eight years. The chapter explores typical forms of common stock PIPE financings across a wide variety of situations and investor types before analyzing both traditional and newly utilized features of these offerings. Private offerings of registered common stock (or registered directs) are becoming increasingly popular, particularly in the current market environment where investors prize liquidity. There is an elaborate discussion on the issuers and investors in the chapter and it also discusses the recent trends in regulatory and market department. Despite their seeming simplicity, common stock PIPE transactions have taken on many nuances and much complexity in their structuring in recent years.