Business software maker Oracle Corp reported quarterly revenue on Monday that missed analysts' estimates as sales from its cloud business fell short of Wall Street expectations.

The company's shares were down nearly 4 per cent at US$49.99 in after-market trading.

Cloud business revenue rose 31.7 per cent to US$1.57 billion, but fell short of the average analysts' estimate of US$1.59 billion, according to Thomson Reuters I/B/E/S.

The company in order to increase its competitiveness in the cloud market struck deals with AT&T Inc, construction company Textura and Bank of America over the past couple of years.

The company reported a net loss of US$4.02 billion, or 98 cents per share, in the third quarter ended Feb. 28, compared to a profit of US$2.24 billion, or 53 cents per share, a year earlier.

Oracle recorded a charge of US$6.9 billion due to changes in the U.S tax law in the reported quarter.

Excluding items, the company earned 83 cents per share. Total revenue rose 6.1 per cent to US$9.77 billion.

Analysts were expecting a profit of 72 cents per share on a revenue of US$9.78 billion.