UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 5) SUN COMMUNITIES, INC. --------------------- (NAME OF ISSUER) COMMON STOCK ------------ (TITLE OF CLASS OF SECURITIES) 866674104 --------- (CUSIP NUMBER) - -------------------------------------------------------------------------------- CHECK THE APPROPRIATE BOX TO DESIGNATE THE RULE PURSUANT TO WHICH THIS SCHEDULE IS FILED: /X/ RULE 13d-1(b) / / RULE 13d-1(c) / / RULE 13d-1(d) PAGE 1 OF 8 PAGES

- -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON: LaSalle Investment Management, Inc. S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON: 36-4160747 - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) /X/ (b) / / - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Maryland - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 98,232 --------------------------------------------------------- NUMBER 6 SHARED VOTING POWER OF SHARES BENEFICIALLY 0 OWNED BY EACH --------------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 98,232 --------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 271,500 - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 369,732 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* Excludes shares beneficially owned by LaSalle Investment Management (Securities), L.P. - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 2.11% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IA - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! 2

- -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON: LaSalle Investment Management (Securities), L.P. S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON: 36-3991973 - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) /X/ (b) / / - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Maryland - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 281,800 --------------------------------------------------------- NUMBER 6 SHARED VOTING POWER OF SHARES BENEFICIALLY 743,104 OWNED BY EACH --------------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 256,900 --------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 826,734 - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,083,634 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* Excludes shares beneficially owned by LaSalle Investment Management, Inc. - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.19% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IA - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! 3

ITEM 1. (a) Name of Issuer Sun Communities, Inc. (b) Address of Issuer's Principal Executive Offices 31700 Middlebelt Rd, Suite 145 Farmington Hills, MI 48334 ITEM 2. LaSalle Investment Management, Inc. provides the following information: (a) Name of Person Filing LaSalle Investment Management, Inc. (b) Address of Principal Business Office or, if none, Residence 200 East Randolph Drive Chicago, Illinois 60601 (c) Citizenship Maryland (d) Title of Class of Securities Common Stock, $.01 par value per share (e) CUSIP Number 411465107 LaSalle Investment Management (Securities), L.P. provides the following information: (a) Name of Person Filing LaSalle Investment Management (Securities), L.P. (b) Address of Principal Business Office or, if none, Residence 200 East Randolph Drive Chicago, Illinois 60601 (c) Citizenship Maryland 4

(d) Title of Class of Securities Common Stock, $.01 par value per share (e) CUSIP Number 94856P102 ITEM 3.* IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b), OR 13d-2(b), CHECK WHETHER THE PERSON FILING IS A: (a) / / Broker or Dealer registered under Section 15 of the Act (b) / / Bank as defined in Section 3(a)(6) of the Act (c) / / Insurance Company as defined in Section 3(a)(19) of the Act (d) / / Investment Company registered under Section 8 of the Investment Company Act (e) /X/ Investment Adviser registered under Section 203 of the Investment Advisers Act of 1940 (f) / / Employee Benefit Plan, Pension Fund which is subject to the provisions of the Employee Retirement Income Security Act of 1974 or Endowment Fund; see Section 240.13d-1(b)(1)(ii)(F) (g) / / Parent Holding Company, in accordance with Section 240.13d-1(b)(ii)(G) (Note: See Item 7) (h) / / A savings association as defined in section 3(b) of the Federal Deposit Insurance Act (i) / / A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (j) / / Group, in accordance with Section 240.13d-1(b)-1(ii)(J) * This response is provided on behalf of LaSalle Investment Management, Inc. and LaSalle Investment Management (Securities), L.P., each an investment adviser under Section 203 of the Investment Advisers Act of 1940. ITEM 4. OWNERSHIP If the percent of the class owned, as of December 31 of the year covered by the statement, or as of the last day of any month described in Rule 13d-1(b)(2), if applicable, exceeds five percent, provide the following information as of that date and identify those shares which there is a right to acquire. LaSalle Investment Management, Inc. provides the following information: (a) Amount Beneficially Owned 369,732 (b) Percent of Class 5

2.11% (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote 98,232 (ii) shared power to vote or to direct the vote 0 (iii) sole power to dispose or to direct the disposition of 98,232 (iv) shared power to dispose or to direct the disposition of 271,500 LaSalle Investment Management (Securities), L.P. provides the following information: (a) Amount Beneficially Owned 1,083,634 (b) Percent of Class 6.19% (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote 281,800 (ii) shared power to vote or to direct the vote 743,104 (iii) sole power to dispose or to direct the disposition of 256,900 (iv) shared power to dispose or to direct the disposition of 826,734 6

ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following / /. 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 The two members of the Group are: LaSalle Investment Management, Inc. ("LaSalle") and LaSalle Investment Management (Securities), L.P. ("LIMS"). LIMS is a Maryland limited partnership, the limited partner of which is LaSalle and the general partner of which is LaSalle Investment Management (Securities), Inc., a Maryland corporation, the sole stockholder of which is LaSalle. LaSalle and LIMS, each registered investment advisers, have different advisory clients. ITEM 9. NOTICE OF DISSOLUTION OF GROUP Not applicable. ITEM 10. CERTIFICATION By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purposes or effect. 7

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. The parties agree that this statement is filed on behalf of each of them. Dated: February 9, 2001 LASALLE INVESTMENT MANAGEMENT, INC. By: /s/ DENISE R. ORGANT ------------------------------------- Name: Denise R. Organt Title: Vice President LASALLE INVESTMENT MANAGEMENT (SECURITIES), L.P. By: /s/ DENISE R. ORGANT ------------------------------------- Name: Denise R. Organt Title: Vice President 8