SECURITIES AND EXCHANGE COMMISSION
Washington, D. C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. 2)
REPLIGEN CORPORATION
(Name of Issuer)
Common Stock, $.01 par value per share
(Title and Class of Securities)
759916109
(CUSIP Number)
December 31, 2005
(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).
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CUSIP No. 759916109 Page 2 of 8 Pages
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1. NAME OF REPORTING PERSONS
S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS
IB PARTNERS MANAGEMENT, INC., IRS number 74-3092655, as general partner on
behalf of the following limited partnerships and on behalf of managed
accounts:
InvestBio Partners, L.P., IRS number 74-3092654, and
InvestBio Short Term Opportunity Fund, L.P., IRS number 20-1477796.
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2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) |_|
(b) |_|
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3. SEC USE ONLY
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4. CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
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NUMBER OF 5. SOLE VOTING POWER
SHARES 0
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BENEFICIALLY 6. SHARED VOTING POWER
OWNED BY 0
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EACH 7. SOLE DISPOSITIVE POWER
REPORTING 0
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PERSON 8. SHARED DISPOSITIVE POWER
WITH 0
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9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
0
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10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
|_|
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11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
Not Appliable
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12. TYPE OF REPORTING PERSON
IB Partners Management, Inc.- CO
InvestBio Partners, L.P. and InvestBio Short Term Opportunity Fund - PN
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CUSIP No. 759916109 Page 3 of 8 Pages
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1. NAME OF REPORTING PERSONS
S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS
Scott Landrem, social security number 43-7650715
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2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) |_|
(b) |_|
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3. SEC USE ONLY
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4. CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
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NUMBER OF 5. SOLE VOTING POWER
SHARES 31,300
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BENEFICIALLY 6. SHARED VOTING POWER
OWNED BY 0
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EACH 7. SOLE DISPOSITIVE POWER
REPORTING 31,300
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PERSON 8. SHARED DISPOSITIVE POWER
WITH 0
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9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
31,300
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10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
|_|
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11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
Not Applicable
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12. TYPE OF REPORTING PERSON
IN
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CUSIP No. 759916109 Page 4 of 8 Pages
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Item 1(a). Name of Issuer:
Repligen Corporation
Item 1(b). Address of Issuer's Principal Executive Offices:
41 Seyon Street, Bldg. 1, Suite 100, Waltham, MA 02453
Item 2(a). Name of Person Filing:
(i) IB Partners Management, Inc.
(ii) InvestBio Partners, L.P.
(iii) InvestBio Short Term Opportunity Fund, L.P.
(iv) Scott Landrem
Item 2(b). Address of Principal Business Office or, if None, Residence:
500 Fifth Avenue, 54th 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:
759916109
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).
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CUSIP No. 759916109 Page 5 of 8 Pages
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(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: 31,300
(b) Percent of Class: Not applicable
(c) Number of Shares as to which the person has:
(i) Sole power to vote or to direct the vote: 31,300
(ii) Shared power to vote or to direct the vote: 0
(iii) Sole power to dispose or to direct the disposition
of: 31,300
(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. |X|.
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.
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CUSIP No. 759916109 Page 6 of 8 Pages
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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 23, 2006 IB PARTNERS MANAGEMENT, INC.,
By: /s/ Scott L. Mathis
--------------------------
Name: Scott L. Mathis
Title: President
INVESTBIO PARTNERS, L.P. and
INVESTBIO SHORT TERM
OPPORTUNITY FUND, L.P.
By: IB PARTNERS MANAGEMENT, INC.,
General Partner
By: /s/ Scott L. Mathis
--------------------------
Name: Scott L. Mathis
Title: President
/s/ Scott Landrem
----------------------
Scott Landrem
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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
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IB Partners Management, Inc. Corporate general partner of InvestBio
Partners, L.P. and InvestBio Short Term
Opportunity Fund, L.P.
InvestBio Partners, L.P. Partnership
InvestBio Short Term Opportunity
Fund, L.P. Partnership
Scott Landrem Individual. Managing Director- Director
of Sales of InvestPrivate Inc. (a
company under common control with IB
Partners Management, Inc.).
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EXHIBIT B
DISCLAIMER OF BENEFICIAL OWNERSHIP
Repligen Corporation
Common Stock
31,300 shares
IB Partners Management, Inc., InvestBio Partners, L.P. and InvestBio Short Term
Opportunity Fund, L.P. disclaim beneficial ownership as to all shares
beneficially owned for Section 13(g) filing purposes by and Scott Landrem.
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