Exhibit 13.1 Quarterly Information (In millions, except per share data) (Unaudited) Quarter Ended - ------------------------------------------------------------------------------- Sept. 30 Dec. 31 Mar. 31 June 30 Year - ------------------------------------------------------------------------------- 1995 Revenue $1,247 $1,482 $ 1,587 $ 1,621 $5,937 Operating income 437 520 549 532 2,038 Net income 316 373 396 368 1,453 Earnings per share 0.25 0.30 0.32 0.29 1.16 Common stock price per share: High 29.63 32.56 37.06 46.19 46.19 Low 23.44 26.94 29.13 34.38 23.44 - ------------------------------------------------------------------------------- 1996 Revenue $2,016 $2,195 $ 2,205 $ 2,255 $8,671 Operating income 708 786 774 810 3,078 Net income 499 575 562 559 2,195 Earnings per share 0.39 0.45 0.44 0.43 1.71 Common stock price per share: High 54.63 51.69 53.53 62.94 62.94 Low 42.50 40.19 39.94 49.81 39.94 - ------------------------------------------------------------------------------- 1997 Revenue $2,295 $2,680 $ 3,208 $ 3,175 $11,358 Operating income 902 1,081 1,568 1,579 5,130 Net income 614 741 1,042 1,057 3,454 Earnings per share 0.47 0.57 0.79 0.80 2.63 Common stock price per share: High 69.31 86.13 103.50 134.94 134.94 Low 53.75 65.44 80.75 89.75 53.75 - ------------------------------------------------------------------------------- The Company's common stock is traded on The Nasdaq Stock Market under the symbol MSFT. On July 31, 1997, there were 53,390 holders of record of the Company's common stock. The Company has not paid cash dividends on its common stock.