<PAGE>
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
------------------------------------
SCHEDULE 14D-1
TENDER OFFER STATEMENT PURSUANT TO SECTION 14(D)(1)
OF THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 1)
------------------------------------
WINTHROP PARTNERS 79 LIMITED PARTNERSHIP
(Name of Subject Company)
QUADRANGLE ASSOCIATES I L.L.C.
(Bidders)
UNITS OF LIMITED PARTNERSHIP INTEREST
(Title of Class of Securities)
NONE
(Cusip Number of Class of Securities)
------------------------------------
Michael L. Ashner
Chief Executive Officer
WIN Manager Corp.
100 Jericho Quadrangle, Suite 214
Jericho, New York 11753
(516) 822-0022
(Name, Address and Telephone Number of Person Authorized
to Receive Notices and Communications on Behalf of Bidders)
------------------------------------
CALCULATION OF FILING FEE
================================================================================
Transaction Valuation*: $1,652,500 Amount of Filing Fee: $330.50
================================================================================
* For purposes of calculating the fee only. This amount assumes the purchase of
3,305 units of limited partnership interest ("Units") of the subject partnership
for $500 per Unit. The amount of the filing fee, calculated in accordance with
Section 14(g)(3) and Rule 0-11(d) under the Securities Exchange Act of 1934, as
amended, equals 1/50th of one percent of the aggregate of the cash offered by
the bidders.
(cover page 1 of 2)
<PAGE>
(cover page 2 of 2)
/ / Check 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: $330.50
Form or Registration No.: 14D-1
Filing Party: Quadrangle Associates I L.L.C.
Date Filed: October 26, 1999
<PAGE>
CUSIP No. NONE 14D-1 Page 3
================================================================================
1. Name of Reporting Persons; I.R.S. Identification Nos. of Above Persons
Quadrangle Associates I L.L.C.
04-3485087
- --------------------------------------------------------------------------------
2. Check the Appropriate Box if a Member of a Group
(a) / /
(b) /X/
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4 Sources of Funds
WC
- --------------------------------------------------------------------------------
5. Check if Disclosure of Legal Proceedings is Required Pursuant to Items
2(e) or 2(f) / /
- --------------------------------------------------------------------------------
6. Citizenship or Place of Organization
Delaware
- --------------------------------------------------------------------------------
7. Aggregate Amount Beneficially Owned by Each Reporting Person
None
- --------------------------------------------------------------------------------
8. Check if the Aggregate Amount in Row 7 Excludes Certain Shares / /
- --------------------------------------------------------------------------------
9. Percent of Class Represented by Amount in Row 7
0
- --------------------------------------------------------------------------------
10. Type of Reporting Person
OO
================================================================================
<PAGE>
CUSIP No. NONE 14D-1 Page 4
================================================================================
1. Name of Reporting Persons; I.R.S. Identification Nos. of Above Persons
WIN MANAGER CORP.
04-3398667
- --------------------------------------------------------------------------------
2. Check the Appropriate Box if a Member of a Group
(a) / /
(b) /X/
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4 Sources of Funds
N/A
- --------------------------------------------------------------------------------
5. Check if Disclosure of Legal Proceedings is Required Pursuant to Items
2(e) or 2(f) / /
- --------------------------------------------------------------------------------
6. Citizenship or Place of Organization
Delaware
- --------------------------------------------------------------------------------
7. Aggregate Amount Beneficially Owned by Each Reporting Person
None
- --------------------------------------------------------------------------------
8. Check if the Aggregate Amount in Row 7 Excludes Certain Shares / /
- --------------------------------------------------------------------------------
9. Percent of Class Represented by Amount in Row 7
0
- --------------------------------------------------------------------------------
10. Type of Reporting Person
CO
================================================================================
<PAGE>
AMENDMENT NO. 1 TO SCHEDULE 14D-1
This Amendment No. 1 amends the Tender Offer Statement on Schedule 14D-1
(the "Statement") filed with the Securities and Exchange Commission on October
26, 1999 by Quadrangle Associates I L.L.C., a Delaware limited liability company
(the "Purchaser"), and WIN Manager Corp., relating to the tender offer by the
Purchaser to purchase up to 3,305 of the outstanding units of limited
partnership interest ("Units") of Winthrop Partners 79 Limited Partnership (the
"Partnership") at a purchase price of $500 per Unit, net to the seller in cash,
upon the terms and subject to the conditions set forth in the Offer to Purchase
dated October 26, 1999 (the "Offer to Purchase") and the related Letter of
Transmittal (which, together with any supplements or amendments, collectively
constitute the "Offer"), to provide certain additional information contained in
the Offer to Purchase.
ITEM 11. MATERIAL TO BE FILED AS EXHIBITS.
Item 11 is hereby amended to add the following:
(a)(4) Supplement No. 1 to Offer to Purchase dated
November 12, 1999
5
<PAGE>
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.
Dated: November 12, 1999
QUADRANGLE ASSOCIATES I L.L.C.
By: WIN Manager Corp.
By: Michael L. Ashner
-----------------------
Michael L. Ashner
Chief Executive Officer
WIN MANAGER CORP.
By: Michael L. Ashner
-----------------------
Michael L. Ashner
Chief Executive Officer
6
<PAGE>
EXHIBIT INDEX
Exhibit Description
- ------- -----------
(a)(4) Supplement No. 1 to Offer to Purchase
7
<PAGE>
SUPPLEMENT NO. 1 TO
OFFER TO PURCHASE FOR CASH
up to 3,305
Units of Limited Partnership Interest
in
WINTHROP PARTNERS 79 LIMITED PARTNERSHIP
For $500 NET PER UNIT
by
QUADRANGLE ASSOCIATES I L.L.C.
- --------------------------------------------------------------------------------
OUR OFFER, WITHDRAWAL RIGHTS AND PRORATION PERIOD WILL EXPIRE AT 12:00 MIDNIGHT
NEW YORK TIME, ON NOVEMBER 30, 1999, UNLESS EXTENDED.
- --------------------------------------------------------------------------------
On October 26, 1999, we offered to purchase up to 3,305 (33%) of the
outstanding units of limited partnership interest of Winthrop Partners 79
Limited Partnership ("your partnership") for a purchase price of $500 per
limited partnership interest, net to you in cash, without interest, upon the
terms and subject to the conditions set forth in our offer to purchase dated
October 26, 1999 and in the related letter of transmittal. Capitalized terms
used in this Supplement No. 1 that are not defined shall have the meaning given
to such term in our offer to purchase.
The purpose of this Supplement No. 1 is to advise you that your
partnership recently received a notice form Wal-Mart Stores stating that they
would not be renewing their lease at your partnership's Mexia, Texas property.
Accordingly, it is expected that the lease with respect to the Mexia, Texas
property will expire in accordance with its terms effective October 1, 2001. If
your partnership is unable to sell the property or find a new tenant prior to
such date, your partnership will be responsible for all costs associated with
the property.
QUADRANGLE ASSOCIATES I L.L.C.
November 12, 1999
