Analysts at the firm set their 12-month price target at $9 on shares of the oil exploration and production company.
Goldman Sachs said it sees lower value for the company's deep-water business.
Separately, an investor who purchased shares of Cobalt International Energy filed a lawsuit against the company in the U.S. district court for the southern district of Texas over alleged violations of federal securities laws.
The lawsuit is in connection with certain allegedly false and misleading statements made between February 21, 2012 and November 4, 2014.
Shares of Cobalt International Energy are higher by 0.38% to $7.85 this morning.