Prepared by MERRILL CORPORATION

-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, LPrI+gmGFeYh+GvMmh7ukXCehQCpNsZhx8pmfC74XK0CG7W93cc2OmUauRZOuQUD gcX8iKaT5pDR2nReCF7llg== 0000912057-02-006141.txt : 20020414 0000912057-02-006141.hdr.sgml : 20020414 ACCESSION NUMBER: 0000912057-02-006141 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20020214 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: MICROSOFT CORP CENTRAL INDEX KEY: 0000789019 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-PREPACKAGED SOFTWARE [7372] IRS NUMBER: 911144442 STATE OF INCORPORATION: WA FISCAL YEAR END: 0630 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-38758 FILM NUMBER: 02547393 BUSINESS ADDRESS: STREET 1: ONE MICROSOFT WAY #BLDG 8 STREET 2: NORTH OFFICE 2211 CITY: REDMOND STATE: WA ZIP: 98052 BUSINESS PHONE: 4258828080 MAIL ADDRESS: STREET 1: ONE MICROSOFT WAY - BLDG 8 STREET 2: NORTH OFFICE 2211 CITY: REDMOND STATE: WA ZIP: 98052-6399 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: GATES WILLIAM H III CENTRAL INDEX KEY: 0000902012 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: ONE MICROSOFT WAY CITY: REDMOND STATE: WA ZIP: 98052 BUSINESS PHONE: 4258828080 MAIL ADDRESS: STREET 1: ONE MICROSOFT WAY CITY: REDMOND STATE: WA ZIP: 98052 SC 13G/A 1 a2070063zsc13ga.htm SC 13G/A Prepared by MERRILL CORPORATION
QuickLinks -- Click here to rapidly navigate through this document

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 9)*

MICROSOFT CORPORATION

(Name of Issuer)
Common Stock, $0.0000125 par value per share

(Title of Class of Securities)
		594918104
		(CUSIP Number)
December 31, 2001

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this schedule is filed:

/ / Rule 13d-1(b)

/ / Rule 13d-1(c)

/x/ Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No.: 594918104



1	NAME OF REPORTING PERSON William H. Gates III S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


2	CHECK THE APPROPRIATE BOX IF A	(a)	/ /
	MEMBER OF A GROUP	(b)	/ /


3	SEC USE ONLY


4	CITIZENSHIP OR PLACE OF ORGANIZATION
	United States of America

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		5	SOLE VOTING POWER
			651,749,668

		6	SHARED VOTING POWER
			- -0-

		7	SOLE DISPOSITIVE POWER
			651,749,668

		8	SHARED DISPOSITIVE POWER
			- -0-

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	651,749,668

10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES / /


11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
	12.0%

12	TYPE OF REPORTING PERSON
	IN

Item 1.
	(a)	Name of Issuer: Microsoft Corporation (the "Issuer")
	(b)	Address of principal executive offices of the Issuer: One Microsoft Way, Redmond, Washington 98052
Item 2.
	(a)	Name of Persons Filing: William H. Gates III
	(b)	Address of Principal Business Office: One Microsoft Way, Redmond, Washington 98052
	(c)	Citizenship: United States of America
	(d)	Title of Class of Securities: Common Stock, $0.0000125 par value per share
	(e)	CUSIP Number: 594918104
Item 3.	Not Applicable
Item 4.	Ownership.
	(a)	Amount beneficially owned: 651,749,668
	(b)	Percent of class: 12.0%
	(c)	Number of shares as to which the person has:
		(i) Sole power to vote or to direct the vote 651,749,668
		(ii) Shared power to vote or to direct the vote -0-
		(iii) Sole power to dispose or to direct the disposition of 651,749,668
		(iv) Shared power to dispose or to direct the disposition of -0-
Item 5.	Ownership of Five Percent or Less of a Class: Not Applicable
Item 6.	Ownership of More than Five Percent on Behalf of Another Person: Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company: Not Applicable
Item 8.	Identification and Classification of Members of the Group: Not Applicable
Item 9.	Notice of Dissolution of a Group: Not Applicable
Item 10.	Certifications
	Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.


		February 12, 2002
		Date

		WILLIAM H. GATES III

		By /s/ Michael Larson
		William H. Gates III, by Michael Larson as attorney in fact*

* Duly authorized under power of attorney dated March 14, 2001, by and on behalf of William H. Gates III, filed with Cascade's Amendment No. 1 to Schedule 13D with respect to Pan American Silver Corp. on March 19, 2001, SEC File Number 005-52919, and incorporated by reference herein.

QuickLinks

SIGNATURE
-----END PRIVACY-ENHANCED MESSAGE-----