The Wall Street powerhouse, however, recorded a total one-off loss of over $900 million that it said was related to a credit event and subsequent losses from "a single prime brokerage client."
Morgan Stanley was one of six banks who had exposure to Archegos Capital Management, a family office fund that defaulted on margin calls late last month and triggered a firesale of stocks across Wall Street.
The company also said on Thursday it was nominating six people, including Cohen, to stand for election to its board at the annual meeting of stockholders on June 9.
The announcement comes after GameStop on Monday increased the value of the new stock it may sell to $1 billion from $100 million, as it seeks to capitalize on a surge in its shares from the Reddit-driven rally.
The company said it would sell up to 3.5 million shares and use the proceeds to speed up the shift in its business model to e-commerce in an overhaul being led by top shareholder and board member Ryan Cohen.
GameStop's stock has gained more than 900% so far this year, giving the company a valuation of as much as $34 billion at one point as retail traders bet against Wall Street hedge funds that had shorted its shares.
GameStop was trading 14.5% higher at $282.73 before the bell, on course for a sixth straight session of gains, while shares of cinema operator AMC Entertainment rose 10% and headphones maker Koss Corp soared about 40%.
GameStop retains a legion of devout followers after a social media frenzy in January triggered a massive rally in which its shares surged more than 1,600%.
Options market activity in the stock, which has returned to the top of the list in a social media-driven retail trading frenzy, suggested investors were betting on higher prices or higher volatility, or both.
GameStop shares touched $120.60 and were on track to nearly triple this week in an equity market where falling bond prices have weakened general investor sentiment towards US stocks.