1 SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 1) (FINAL AMENDMENT) AND SCHEDULE 13D UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 22) National Property Investors 4 --------------------------------- (Name of Subject Company (Issuer) AIMCO Properties, L.P. -- Offeror (Names of Filing Persons (Identifying Status as Offeror, Issuer or Other Person)) Limited Partnership Units ------------------------- (Title of Class Securities) None (CUSIP Number of Class Securities) Patrick J. Foye Executive Vice President Apartment Investment And Management Company Colorado Center, Tower Two 2000 South Colorado Boulevard, Suite 2-1000 Denver, Colorado 80222 (303) 757-8081 --------------------------------------------------------- Name, address, and telephone numbers of person authorized to receive notices and communications on behalf of filing persons) Copy To: Gregory M. Chait Katherine M. Koops Powell, Goldstein, Frazer & Murphy LLP 191 Peachtree Street, N.E., Sixteenth Floor Atlanta, Georgia 30303 (404) 572-6600 Calculation of Filing Fee Transaction valuation* Amount of filing fee - ---------------------- -------------------- $4,300,569 $861 (previously paid) * For purposes of calculating the fee only. This amount assumes the purchase of 15,753 units of limited partnership interest of the subject partnership for $273.00 per unit. The amount of the filing fee equals 1/50th of one percent of the aggregate of the cash offered by the bidder. [ ] Check the box if any part of the fee is offset as provided by Rule 0-11(a)(2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing. Amount Previously Paid: $ Filing Party: Form or Registration No.: Date Filed: ---------- [ ] Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer. Check the appropriate boxes below to designate any transactions to which the statement relates: [X] third-party tender offer subject to Rule 14d-1 [ ] going-private transaction subject to Rule 13e-3 [ ] issuer tender offer subject to Rule 13e-4 [X] amendment to Schedule 13D under Rule 13d-2 Check the following box if the filing is a final amendment reporting the results of the tender offer: [X] 2 CUSIP No. NONE 1. NAME OF REPORTING PERSON(S) S.S.# OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) AIMCO PROPERTIES, L.P. 84-1275721 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF GROUP (a) [ ] (b) [X] 3. SEC USE ONLY 4. SOURCE OF FUNDS WC, BK 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware 7. NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON A. SOLE VOTING POWER B. SHARED DISPOSITIVE POWER 44,788 Units C. SOLE DISPOSITIVE POWER D. SHARED DISPOSITIVE POWER 44,788 Units 8. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 44,788 Units 9. CHECK IF THE AGGREGATE AMOUNT IN ROW (7) EXCLUDES CERTAIN SHARES [ ] 10. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7) Approximately 74.64% 11. TYPE OF REPORTING PERSON PN 3 CUSIP No. NONE 1. NAME OF REPORTING PERSON(S) S.S.# OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) AIMCO-GP, INC. 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF GROUP (a) [ ] (b) [X] 3. SEC USE ONLY 4. SOURCE OF FUNDS Not Applicable 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware 7. NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON A. SOLE VOTING POWER B. SHARED VOTING POWER 44,788 Units C. SOLE DISPOSITIVE POWER D. SHARED DISPOSITIVE POWER 44,788 Units 8. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 44,788 Units 9. CHECK IF THE AGGREGATE AMOUNT IN ROW (7) EXCLUDES CERTAIN SHARES [ ] 10. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7) Approximately 74.64% 11. TYPE OF REPORTING PERSON CO 4 CUSIP No. NONE 1. NAME OF REPORTING PERSON(S) S.S.# OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) APARTMENT INVESTMENT AND MANAGEMENT COMPANY 84-129577 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF GROUP (a) [ ] (b) [X] 3. SEC USE ONLY 4. SOURCE OF FUNDS Not Applicable 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION Maryland 7. NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON A. SOLE VOTING POWER B. SHARED VOTING POWER 44,788 Units C. SOLE DISPOSITIVE POWER D. SHARED DISPOSITIVE POWER 44,788 Units 8. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 44,788 Units 9. CHECK IF THE AGGREGATE AMOUNT IN ROW (7) EXCLUDES CERTAIN SHARES [ ] 10. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7) Approximately 74.64% 11. TYPE OF REPORTING PERSON CO 5 1. NAME OF REPORTING PERSON(S) S.S.# OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) INSIGNIA PROPERTIES, L.P. 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF GROUP (a) [ ] (b) [X] 3. SEC USE ONLY 4. SOURCE OF FUNDS Not Applicable 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware 7. NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON A. SOLE VOTING POWER B. SHARED VOTING POWER 32,525 Units C. SOLE DISPOSITIVE POWER D. SHARED DISPOSITIVE POWER 32,525 Units 8. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 32,525 Units 9. CHECK IF THE AGGREGATE AMOUNT IN ROW (7) EXCLUDES CERTAIN SHARES [ ] 10. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7) Approximately 54.20% 11. TYPE OF REPORTING PERSON PN 6 1. NAME OF REPORTING PERSON(S) S.S.# OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) AIMCO/IPT, INC. 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF GROUP (a) [ ] (b) [X] 3. SEC USE ONLY 4. SOURCE OF FUNDS Not Applicable 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware 7. NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON A. SOLE VOTING POWER B. SHARED VOTING POWER 32,525 Units C. SOLE DISPOSITIVE POWER D. SHARED DISPOSITIVE POWER 32,525 Units 8. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 32,525 Units 9. CHECK IF THE AGGREGATE AMOUNT IN ROW (7) EXCLUDES CERTAIN SHARES [ ] 10. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7) Approximately 54.20% 11. TYPE OF REPORTING PERSON CO 7 1. NAME OF REPORTING PERSON(S) S.S.# OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) IPLP ACQUISITION I, L.L.C. 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF GROUP (a) [ ] (b) [X] 3. SEC USE ONLY 4. SOURCE OF FUNDS Not Applicable 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware 7. NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON A. SOLE VOTING POWER B. SHARED VOTING POWER 4,452 Units C. SOLE DISPOSITIVE POWER D. SHARED DISPOSITIVE POWER 4,452 Units 8. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 4,452 Units 9. CHECK IF THE AGGREGATE AMOUNT IN ROW (7) EXCLUDES CERTAIN SHARES [ ] 10. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7) Approximately 7.42% 11. TYPE OF REPORTING PERSON OO 8 TENDER OFFER STATEMENT/AMENDMENT NO. 22 TO SCHEDULE 13D This is the Final Amendment to the Tender Offer Statement on Schedule TO relating to the tender offer by AIMCO Properties, L.P., a Delaware limited partnership, to purchase all of the outstanding units, or such lesser number of units as are properly tendered, of limited partnership interest of National Property Investors 4, a California limited partnership (the "Partnership"), at a price of $273.00 per unit, subject to the conditions set forth in the Offer to Purchase dated February 8, 2001, and in the related Letter of Transmittal and Acknowledgment and Agreement, which, as amended and supplemented from time to time, together constituted the tender offer. At 5:00 p.m. on March 9, 2001, the offer expired pursuant to its terms. A total of 536 units, representing approximately 0.89% of the outstanding units, were validly tendered and not withdrawn pursuant to the offer. AIMCO Properties has accepted for payment all of those units at a price of $273 per unit. 9 SIGNATURE After due 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. Date: March 23, 2001 AIMCO PROPERTIES, L.P. By: AIMCO-GP, INC. (General Partner) By: /s/ Patrick J. Foye ---------------------------- Executive Vice President AIMCO-GP, INC. By: /s/ Patrick J. Foye ---------------------------- Executive Vice President APARTMENT INVESTMENT AND MANAGEMENT COMPANY By: /s/ Patrick J. Foye ---------------------------- Executive Vice President IPLP ACQUISITION I, L.L.C. By: /s/ Patrick J. Foye ---------------------------- Executive Vice President AIMCO/IPT, INC. By: /s/ Patrick J. Foye ---------------------------- Executive Vice President INSIGNIA PROPERTIES, L.P. By: AIMCO/IPT, INC. (General Partner) By: /s/ Patrick J. Foye ---------------------------- Executive Vice President