(Corrects to “one member” from “two members” in paragraph 10)

The AIG logo is seen at its building in New York's financial district March 19, 2015. REUTERS/Brendan McDermid

(Reuters) - American International Group Inc AIG.N, under fire from investors to improve its performance, reported a lower-than-expected profit for the third straight quarter as poor returns from hedge funds hurt its investment income.

Shares of the biggest U.S. commercial insurer by premiums fell 3.3 percent in extended trading on Monday.

AIG has been scaling back investments in hedge funds, which have borne the brunt of excessive market volatility in the past year.

Big-name hedge funds favored by pension funds and the ultra-wealthy for their track record of stellar returns took a battering in the first quarter of 2016, with some posting their worst ever start to a year on record.

AIG’s weak results come at a time when the company is facing the possibility of having to set aside more capital as regulators worry about financial firms deemed “too big to fail”.

The insurer’s near collapse in 2008 and its $182 billion bailout by the U.S. government led to its inclusion in the Federal Reserve’s list of “systemically important financial institutions” (SIFIs).

Chief Executive Peter Hancock said in March that a judge's ruling that MetLife Inc MET.N was not "too big to fail" opened up an opportunity for AIG to seek an exemption from the designation.

Investors will look for an update on AIG’s position when the company holds its post-earnings call on Tuesday.

AIG has been under pressure from activist investor Carl Icahn to split into three independent companies.

In February, the insurer agreed to add one member nominated by Icahn to its board. Samuel Merksamer, a managing director at Icahn Capital LP, and billionaire investor John Paulson are expected to join AIG’s board next week.

The operating profit attributable to AIG fell 54 percent to $773 million in the first quarter, partly due to restructuring costs of $122 million.

On a per-share basis, AIG earned 65 cents, far short of the average analyst estimate of $1.00, according to Thomson Reuters I/B/E/S.

Pre-tax income in AIG’s commercial property and casualty insurance business, its biggest, fell 38.5 percent to $720 million. The unit’s net investment income fell about 44 percent to $577 million.

Shares of AIG, which traces its roots to a two-room office in Shanghai in 1919, were trading at $54.75 after the bell.

Up to Monday’s close, the stock had fallen nearly 9 percent this year.