SECURITIES AND EXCHANGE COMMISSION
Washington, D. C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. 1)
ALTEON INC.
(Name of Issuer)
Common Stock, $.01 par value per share
(Title and Class of Securities)
02144G-10-7
(CUSIP Number)
December 31, 2004
(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)
|X| Rule 13d-1(c)
|_| 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 the
disclosures provided in a prior cover page.
The information required in 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 (the "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. 02144G-10-7 Page 2 of 8 Pages
--------------------------------------------------------------------------------
1. NAME OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
IB PARTNERS MANAGEMENT, INC., IRS number 74-3092655,
As general partner on behalf of:
InvestBio Partners, L.P., IRS number 74-3092654, and
InvestBio Single Target, L.P., IRS number 20-1615918.
--------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) |_|
(b) |_|
--------------------------------------------------------------------------------
3. SEC USE ONLY
--------------------------------------------------------------------------------
4. CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
--------------------------------------------------------------------------------
5. SOLE VOTING POWER
5,041,500
NUMBER OF --------------------------------------------------------------
SHARES 6. SHARED VOTING POWER
BENEFICIALLY
OWNED BY 0
EACH --------------------------------------------------------------
REPORTING 7. SOLE DISPOSITIVE POWER
PERSON
WITH 5,041,500
--------------------------------------------------------------
8. SHARED DISPOSITIVE POWER
0
--------------------------------------------------------------------------------
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
5,041,500
--------------------------------------------------------------------------------
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
|_|
--------------------------------------------------------------------------------
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
8.7%
--------------------------------------------------------------------------------
12. TYPE OF REPORTING PERSON*
IB Partners Management, Inc.- CO
InvestBio Partners, L.P. and InvestBio Single Target, L.P.- PN
--------------------------------------------------------------------------------
2
CUSIP No. 02144G-10-7 Page 3 of 8 Pages
--------------------------------------------------------------------------------
1. NAME OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
Scott L. Mathis
--------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) |_|
(b) |_|
--------------------------------------------------------------------------------
3. SEC USE ONLY
--------------------------------------------------------------------------------
4. CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
--------------------------------------------------------------------------------
5. SOLE VOTING POWER
5,041,500
NUMBER OF --------------------------------------------------------------
SHARES 6. SHARED VOTING POWER
BENEFICIALLY
OWNED BY 0
EACH --------------------------------------------------------------
REPORTING 7. SOLE DISPOSITIVE POWER
PERSON
WITH 5,041,500
--------------------------------------------------------------
8. SHARED DISPOSITIVE POWER
0
--------------------------------------------------------------------------------
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
5,041,500
--------------------------------------------------------------------------------
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
|_|
--------------------------------------------------------------------------------
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
8.7%
--------------------------------------------------------------------------------
12. TYPE OF REPORTING PERSON*
IN, HC (control person)
--------------------------------------------------------------------------------
3
CUSIP No. 02144G-10-7 Page 4 of 8 Pages
Item 1(a). Name of Issuer:
Alteon Inc.
Item 1(b). Address of Issuer's Principal Executive Offices:
6 Campus Drive, Parsippany, NJ 07054
Item 2(a). Name of Person Filing:
(i) IB Partners Management, Inc.
(ii) InvestBio Partners, L.P.
(iii) InvestBio Single Target, L.P.
(iv) Scott L. Mathis
Item 2(b). Address of Principal Business Office or, if None, Residence:
500 Fifth Avenue, 56th Fl., New York, NY 10110
Item 2(c). Citizenship:
Not Applicable.
Item 2(d). Title of Class of Securities:
Common Stock, $.01 par value.
Item 2(e). CUSIP Number:
02144G-10-7
Item 3. If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b) or
(c), 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) |_| Investment Adviser registered in accordance with Rule
13d-1(b)(1)(ii)(E).
4
CUSIP No. 02144G-10-7 Page 5 of 8 Pages
(f) |_| Employee Benefit Plan or Endowment Fund in accordance with
Rule 13d-1(b)(1)(ii)(F).
(g) |_| Parent Holding Company or control person in accordance
with Rule 13d-1(b)(1)(ii)(G).
(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 Rule 13d-1(b)(1)(ii)(J).
If this Statement is filed pursuant to Rule 13d-1(c),
check this box |X|.
Item 4. Ownership.
(a) Amount beneficially owned: 5,041,500
(b) Percent of Class: 8.7%
(c) Number of Shares as to which the person has:
(i) Sole power to vote or to direct the vote:
5,041,500
(ii) Shared power to vote or to direct the vote:
0
(iii) Sole power to dispose or to direct the disposition of:
5,041,500
(iv) Shared Power to dispose or to direct the disposition of:
0
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.
5
CUSIP No. 02144G-10-7 Page 6 of 8 Pages
Item 8. Identification and Classification of Members of the Group.
See Exhibit A
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 not acquired and are
not held for the purpose of or with the effect of changing or
influencing the control of the issuer of the securities and were not
acquired and are not held in connection with or as a participant in
any transaction having that purpose or effect.
SIGNATURE
Date: January 19, 2005 IB PARTNERS MANAGEMENT, INC.,
By: /s/ Scott L. Mathis
-----------------------------------
Name: Scott L. Mathis
Title: President
INVESTBIO PARTNERS, L.P. and
INVESTBIO SINGLE TARGET, L.P.
By: IB PARTNERS MANAGEMENT, INC.,
General Partner
By: /s/ Scott L. Mathis
-----------------------------------
Name: Scott L. Mathis
Title: President
/s/ Scott L. Mathis
-------------------------------
Scott L. Mathis, Control Person
6
EXHIBIT A
IDENTIFICATION AND CLASSIFICATION OF JOINT FILERS
Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934,
the reporting persons making this joint filing are identified and classified as
follows:
Name Classification
---- --------------
IB Partners Management, Inc. Corporate general partner of
InvestBio Partners, L.P. and
InvestBio Single Target, L.P.
InvestBio Partners, L.P. Partnership
InvestBio Single Target, L.P. Partnership
Scott L. Mathis Individual and control person of
IB Partners Management, Inc.
7
EXHIBIT B
DISCLAIMER OF BENEFICIAL OWNERSHIP
Alteon Inc.
Common Stock
5,041,500 shares
Scott L. Mathis disclaims beneficial ownership of 4,995,500 shares beneficially
owned for Section 13(g) filing purposes by InvestBio Partners, L.P. and
InvestBio Single Target, L.P. IB Partners Management, Inc. disclaims beneficial
ownership as to all 5,041,500 shares beneficially owned for Section 13(g) filing
purposes by InvestBio Partners, L.P., InvestBio Single Target, L.P. and Scott L.
Mathis.
8