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Home > Insider Trading > Latest 13D and 13G Filings > 13G Filing (0000921895-24-000445)

Filing Details

Accession Number:
0000921895-24-000445
Form Type:
13G Filing
Publication Date:
2024-02-13 19:00:00
Filed By:
Biotechnology Value Fund L P
Company:
Ikena Oncology Inc.
Filing Date:
2024-02-14
SEC Url:
13G Filing
Ownership Summary

Please notice the below summary table is generated without human intervention and may contain errors. Please refer to the complete filing displayed below for exact figures.

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
Biotechnology Value Fund 0 0 2,469,828 2,469,828 5.1%
BVF I GP 0 0 2,469,828 2,469,828 5.1%
Biotechnology Value Fund II 0 0 1,983,612 1,983,612 4.1%
BVF II GP 0 0 1,983,612 1,983,612 4.1%
Biotechnology Value Trading Fund OS 0 0 253,887 253,887 Less than 1%
BVF Partners OS Ltd 0 0 253,887 253,887 Less than 1%
BVF GP Holdings 0 0 4,453,440 4,453,440 9.2%
BVF Partners 0 0 4,769,164 4,769,164 9.9%
BVF Inc 0 0 4,769,164 4,769,164 9.9%
Mark N. Lampert 0 0 4,769,164 4,769,164 9.9%
Filing

 UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

(Rule 13d-102)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED

PURSUANT TO RULE 13d-2(b)

(Amendment No. 3)1

 

Ikena Oncology, Inc.

 (Name of Issuer)

Common Stock, par value $0.001 per share

 (Title of Class of Securities)

45175G108

 (CUSIP Number)

December 31, 2023

 (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)
   ☒  Rule 13d-1(c)
   ☐  Rule 13d-1(d)

 

 

 

1              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 disclosures provided in a prior cover page.

The information required on 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 (“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. 45175G108

 

  1   NAME OF REPORTING PERSON  
         
        Biotechnology Value Fund, L.P.  
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ☒
        (b) ☐
           
  3   SEC USE ONLY    
           
             
  4   CITIZENSHIP OR PLACE OF ORGANIZATION  
         
        Delaware  
NUMBER OF   5   SOLE VOTING POWER  
SHARES          
BENEFICIALLY         0  
OWNED BY   6   SHARED VOTING POWER  
EACH          
REPORTING         2,469,828  
PERSON WITH   7   SOLE DISPOSITIVE POWER  
         
          0  
    8   SHARED DISPOSITIVE POWER  
           
          2,469,828  
  9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  
         
        2,469,828  
  10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES     ☐
       
           
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  
         
        5.1%  
  12   TYPE OF REPORTING PERSON  
         
        PN  

  

2

CUSIP No. 45175G108

  1   NAME OF REPORTING PERSON  
         
        BVF I GP LLC  
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ☒
        (b) ☐
           
  3   SEC USE ONLY    
           
             
  4   CITIZENSHIP OR PLACE OF ORGANIZATION  
         
        Delaware  
NUMBER OF   5   SOLE VOTING POWER  
SHARES          
BENEFICIALLY         0  
OWNED BY   6   SHARED VOTING POWER  
EACH          
REPORTING         2,469,828  
PERSON WITH   7   SOLE DISPOSITIVE POWER  
         
          0  
    8   SHARED DISPOSITIVE POWER  
           
          2,469,828  
  9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  
         
        2,469,828  
  10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES     ☐
       
           
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  
         
        5.1%  
  12   TYPE OF REPORTING PERSON  
         
        OO  

  

3

CUSIP No. 45175G108

 

  1   NAME OF REPORTING PERSON  
         
        Biotechnology Value Fund II, L.P.  
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ☒
        (b) ☐
           
  3   SEC USE ONLY    
           
             
  4   CITIZENSHIP OR PLACE OF ORGANIZATION  
         
        Delaware  
NUMBER OF   5   SOLE VOTING POWER  
SHARES          
BENEFICIALLY         0  
OWNED BY   6   SHARED VOTING POWER  
EACH          
REPORTING         1,983,612  
PERSON WITH   7   SOLE DISPOSITIVE POWER  
         
          0  
    8   SHARED DISPOSITIVE POWER  
           
          1,983,612  
  9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  
         
        1,983,612  
  10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES     ☐
       
           
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  
         
        4.1%  
  12   TYPE OF REPORTING PERSON  
         
        PN  

  

4

CUSIP No. 45175G108

 

  1   NAME OF REPORTING PERSON  
         
        BVF II GP LLC  
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ☒
        (b) ☐
           
  3   SEC USE ONLY    
           
             
  4   CITIZENSHIP OR PLACE OF ORGANIZATION  
         
        Delaware  
NUMBER OF   5   SOLE VOTING POWER  
SHARES          
BENEFICIALLY         0  
OWNED BY   6   SHARED VOTING POWER  
EACH          
REPORTING         1,983,612  
PERSON WITH   7   SOLE DISPOSITIVE POWER  
         
          0  
    8   SHARED DISPOSITIVE POWER  
           
          1,983,612  
  9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  
         
        1,983,612  
  10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES     ☐
       
           
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  
         
        4.1%  
  12   TYPE OF REPORTING PERSON  
         
        OO  

  

5

CUSIP No. 45175G108

 

  1   NAME OF REPORTING PERSON  
         
        Biotechnology Value Trading Fund OS LP  
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ☒
        (b) ☐
           
  3   SEC USE ONLY    
           
             
  4   CITIZENSHIP OR PLACE OF ORGANIZATION  
         
        Cayman Islands  
NUMBER OF   5   SOLE VOTING POWER  
SHARES          
BENEFICIALLY         0  
OWNED BY   6   SHARED VOTING POWER  
EACH          
REPORTING         253,887  
PERSON WITH   7   SOLE DISPOSITIVE POWER  
         
          0  
    8   SHARED DISPOSITIVE POWER  
           
          253,887  
  9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  
         
        253,887  
  10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES     ☐
       
           
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  
         
        Less than 1%  
  12   TYPE OF REPORTING PERSON  
         
        PN  

  

6

CUSIP No. 45175G108

 

  1   NAME OF REPORTING PERSON  
         
        BVF Partners OS Ltd.  
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ☒
        (b) ☐
           
  3   SEC USE ONLY    
           
             
  4   CITIZENSHIP OR PLACE OF ORGANIZATION  
         
        Cayman Islands  
NUMBER OF   5   SOLE VOTING POWER  
SHARES          
BENEFICIALLY         0  
OWNED BY   6   SHARED VOTING POWER  
EACH          
REPORTING         253,887  
PERSON WITH   7   SOLE DISPOSITIVE POWER  
         
          0  
    8   SHARED DISPOSITIVE POWER  
           
          253,887  
  9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  
         
        253,887  
  10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES     ☐
       
           
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  
         
        Less than 1%  
  12   TYPE OF REPORTING PERSON  
         
        CO  

  

7

CUSIP No. 45175G108

 

  1   NAME OF REPORTING PERSON  
         
        BVF GP Holdings LLC  
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ☒
        (b) ☐
           
  3   SEC USE ONLY    
           
             
  4   CITIZENSHIP OR PLACE OF ORGANIZATION  
         
        Delaware  
NUMBER OF   5   SOLE VOTING POWER  
SHARES          
BENEFICIALLY         0  
OWNED BY   6   SHARED VOTING POWER  
EACH          
REPORTING         4,453,440  
PERSON WITH   7   SOLE DISPOSITIVE POWER  
         
          0  
    8   SHARED DISPOSITIVE POWER  
           
          4,453,440  
  9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  
         
        4,453,440  
  10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES     ☐
       
           
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  
         
        9.2%  
  12   TYPE OF REPORTING PERSON  
         
        OO  

  

8

CUSIP No. 45175G108

 

  1   NAME OF REPORTING PERSON  
         
        BVF Partners L.P.  
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ☒
        (b) ☐
           
  3   SEC USE ONLY    
           
             
  4   CITIZENSHIP OR PLACE OF ORGANIZATION  
         
        Delaware  
NUMBER OF   5   SOLE VOTING POWER  
SHARES          
BENEFICIALLY         0  
OWNED BY   6   SHARED VOTING POWER  
EACH          
REPORTING         4,769,164  
PERSON WITH   7   SOLE DISPOSITIVE POWER  
         
          0  
    8   SHARED DISPOSITIVE POWER  
           
          4,769,164  
  9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  
         
        4,769,164  
  10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES     ☐
       
           
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  
         
        9.9%  
  12   TYPE OF REPORTING PERSON  
         
        PN, IA  

  

9

CUSIP No. 45175G108

 

  1   NAME OF REPORTING PERSON  
         
        BVF Inc.  
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ☒
        (b) ☐
           
  3   SEC USE ONLY    
           
             
  4   CITIZENSHIP OR PLACE OF ORGANIZATION  
         
        Delaware  
NUMBER OF   5   SOLE VOTING POWER  
SHARES          
BENEFICIALLY         0  
OWNED BY   6   SHARED VOTING POWER  
EACH          
REPORTING         4,769,164  
PERSON WITH   7   SOLE DISPOSITIVE POWER  
         
          0  
    8   SHARED DISPOSITIVE POWER  
           
          4,769,164  
  9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  
         
        4,769,164  
  10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES     ☐
       
           
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  
         
        9.9%  
  12   TYPE OF REPORTING PERSON  
         
        CO  

  

10

CUSIP No. 45175G108

 

  1   NAME OF REPORTING PERSON  
         
        Mark N. Lampert  
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ☒
        (b) ☐
           
  3   SEC USE ONLY    
           
             
  4   CITIZENSHIP OR PLACE OF ORGANIZATION  
         
        United States  
NUMBER OF   5   SOLE VOTING POWER  
SHARES          
BENEFICIALLY         0  
OWNED BY   6   SHARED VOTING POWER  
EACH          
REPORTING         4,769,164  
PERSON WITH   7   SOLE DISPOSITIVE POWER  
         
          0  
    8   SHARED DISPOSITIVE POWER  
           
          4,769,164  
  9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON  
         
        4,769,164  
  10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES     ☐
       
           
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)  
         
        9.9%  
  12   TYPE OF REPORTING PERSON  
         
        IN  

  

11

CUSIP No. 45175G108

 

Item 1(a).Name of Issuer:

 

Ikena Oncology, Inc., a Delaware corporation (the “Issuer”).

 

Item 1(b).Address of Issuer’s Principal Executive Offices:

 

645 Summer Street, Suite 101

Boston, Massachusetts 02210

 

Item 2(a).Name of Person Filing
Item 2(b).Address of Principal Business Office or, if None, Residence
Item 2(c).Citizenship

 

Biotechnology Value Fund, L.P. (“BVF”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

 

BVF I GP LLC (“BVF GP”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

 

Biotechnology Value Fund II, L.P. (“BVF2”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

 

BVF II GP LLC (“BVF2 GP”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

 

Biotechnology Value Trading Fund OS LP (“Trading Fund OS”)

PO Box 309 Ugland House

Grand Cayman, KY1-1104

Cayman Islands

Citizenship: Cayman Islands

 

BVF Partners OS Ltd. (“Partners OS”)

PO Box 309 Ugland House

Grand Cayman, KY1-1104

Cayman Islands

Citizenship: Cayman Islands

 

BVF GP Holdings LLC (“BVF GPH”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

 

BVF Partners L.P. (“Partners”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

12

CUSIP No. 45175G108

 

BVF Inc.

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: Delaware

 

Mark N. Lampert (“Mr. Lampert”)

44 Montgomery St., 40th Floor

San Francisco, California 94104

Citizenship: United States

 

Each of the foregoing is referred to as a “Reporting Person” and collectively as the “Reporting Persons.”

 

Item 2(d).Title of Class of Securities:

 

Common Stock, par value $0.001 per share (the “Shares”).

 

Item 2(e).CUSIP Number:

 

45175G108

 

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:

 

    /x/ Not applicable.
       
  (a) / / Broker or dealer registered under Section 15 of the Exchange Act.
       
  (b) / / Bank as defined in Section 3(a)(6) of the Exchange Act.
       
  (c) / / Insurance company as defined in Section 3(a)(19) of the Exchange Act.
       
  (d) / / Investment company registered under Section 8 of the Investment Company Act.
       
  (e) / / An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E).
       
  (f) / / An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F).
       
  (g) / / A 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.
       
  (j) / / A non-U.S. institution, in accordance with Rule 13d-1(b)(1)(ii)(J).
       
  (k) / / Group, in accordance with Rule 13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J), please specify the type of institution: ____

 

13

CUSIP No. 45175G108

Item 4.Ownership

 

(a)Amount beneficially owned:

 

As of the close of business on December 31, 2023, (i) BVF beneficially owned 2,469,828 Shares, (ii) BVF2 beneficially owned 1,983,612 Shares and (iii) Trading Fund OS beneficially owned 253,887 Shares.

 

BVF GP, as the general partner of BVF, may be deemed to beneficially own the 2,469,828 Shares beneficially owned by BVF.

 

BVF2 GP, as the general partner of BVF2, may be deemed to beneficially own the 1,983,612 Shares beneficially owned by BVF2.

 

Partners OS, as the general partner of Trading Fund OS, may be deemed to beneficially own the 253,887 Shares beneficially owned by Trading Fund OS.

 

BVF GPH, as the sole member of each of BVF GP and BVF2 GP, may be deemed to beneficially own the 4,453,440 Shares beneficially owned in the aggregate by BVF and BVF2.

 

Partners, as the investment manager of BVF, BVF2 and Trading Fund OS, and the sole member of Partners OS, may be deemed to beneficially own the 4,769,164 Shares beneficially owned in the aggregate by BVF, BVF2 and Trading Fund OS and held in a certain Partners managed account (the “Partners Managed Account”), including 61,837 Shares held in the Partners Managed Account.

 

BVF Inc., as the general partner of Partners, may be deemed to beneficially own the 4,769,164 Shares beneficially owned by Partners.

 

Mr. Lampert, as a director and officer of BVF Inc., may be deemed to beneficially own the 4,769,164 Shares beneficially owned by BVF Inc.

 

The foregoing should not be construed in and of itself as an admission by any Reporting Person as to beneficial ownership of any Shares owned by another Reporting Person. BVF GP disclaims beneficial ownership of the Shares beneficially owned by BVF. BVF2 GP disclaims beneficial ownership of the Shares beneficially owned by BVF2. Partners OS disclaims beneficial ownership of the Shares beneficially owned by Trading Fund OS. BVF GPH disclaims beneficial ownership of the Shares beneficially owned by BVF and BVF2. Each of Partners, BVF Inc. and Mr. Lampert disclaims beneficial ownership of the Shares beneficially owned by BVF, BVF2 and Trading Fund OS and held in the Partners Managed Account, and the filing of this statement shall not be construed as an admission that any such person or entity is the beneficial owner of any such securities.

14

CUSIP No. 45175G108

 

(b)Percent of class:

 

The following percentages are based on 48,258,111 Shares outstanding as of November 1, 2023, as disclosed in the Issuer’s Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 9, 2023.

 

As of the close of business on December 31, 2023, (i) BVF beneficially owned approximately 5.1% of the outstanding Shares, (ii) BVF2 beneficially owned approximately 4.1% of the outstanding Shares, (iii) Trading Fund OS beneficially owned less than 1% of the outstanding Shares, (iv) BVF GP may be deemed to beneficially own approximately 5.1% of the outstanding Shares, (v) BVF2 GP may be deemed to beneficially own approximately 4.1% of the outstanding Shares, (vi) Partners OS may be deemed to beneficially own less than 1% of the outstanding Shares, (vii) BVF GPH may be deemed to beneficially own approximately 9.2% of the outstanding Shares and (viii) each of Partners, BVF Inc. and Mr. Lampert may be deemed to beneficially own approximately 9.9% of the outstanding Shares (less than 1% of the outstanding Shares are held in the Partners Managed Account).

 

(c)Number of shares as to which such person has:

 

(i)Sole power to vote or to direct the vote

 

See Cover Pages Items 5-9.

 

(ii)Shared power to vote or to direct the vote

 

See Cover Pages Items 5-9.

 

(iii)Sole power to dispose or to direct the disposition of

 

See Cover Pages Items 5-9.

 

(iv)Shared power to dispose or to direct the disposition of

 

See Cover Pages Items 5-9.

 

Item 5.Ownership of Five Percent or Less of a Class.

 

Not Applicable.

 

Item 6.Ownership of More than Five Percent on Behalf of Another Person.

 

BVF GP, BVF GPH, Partners, BVF Inc. and Mr. Lampert share voting and dispositive power over the Shares beneficially owned by BVF. BVF GPH, Partners, BVF Inc. and Mr. Lampert share voting and dispositive power over the Shares beneficially owned by BVF2. Partners, BVF Inc. and Mr. Lampert share voting and dispositive power over the Shares beneficially owned by Trading Fund OS and held in the Partners Managed Account.

15

CUSIP No. 45175G108

 

Item 7.Identification and Classification of the Subsidiary That Acquired the Security Being Reported on by the Parent Holding Company or Control Person.

 

Not Applicable.

 

Item 8.Identification and Classification of Members of the Group.

 

See Exhibit 99.1 to the Schedule 13G filed by the Reporting Persons with the Securities and Exchange Commission on April 5, 2021.

 

Item 9.Notice of Dissolution of Group.

 

Not Applicable.

 

Item 10.Certifications.

 

By signing below each of the undersigned certifies that, to the best of its 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.

16

CUSIP No. 45175G108

 

SIGNATURE

 

After reasonable inquiry and to the best of his knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

 

Dated: February 14, 2024

 

BIOTECHNOLOGY VALUE FUND, L.P.   BIOTECHNOLOGY VALUE TRADING FUND OS LP
       
By: BVF I GP LLC, its general partner   By: BVF Partners L.P., its investment manager
      By: BVF Inc., its general partner
By:

/s/ Mark N. Lampert

      
  Mark N. Lampert   By: /s/ Mark N. Lampert
  Chief Executive Officer     Mark N. Lampert
        President
         
BVF I GP LLC      
      BVF GP HOLDINGS LLC
By: /s/ Mark N. Lampert    
  Mark N. Lampert   By: /s/ Mark N. Lampert
  Chief Executive Officer     Mark N. Lampert
        Chief Executive Officer
         
BIOTECHNOLOGY VALUE FUND II, L.P.    
      BVF PARTNERS L.P.
By: BVF II GP LLC, its general partner    
      By: BVF Inc., its general partner
By:

/s/ Mark N. Lampert

      
  Mark N. Lampert   By: /s/ Mark N. Lampert
  Chief Executive Officer     Mark N. Lampert
        President
         
BVF II GP LLC      
      BVF INC.
By: /s/ Mark N. Lampert    
  Mark N. Lampert   By: /s/ Mark N. Lampert
  Chief Executive Officer     Mark N. Lampert
        President
         
BVF PARTNERS OS LTD.      
      /s/ Mark N. Lampert
By: BVF Partners L.P., its sole member   MARK N. LAMPERT
By: BVF Inc., its general partner    
         
By:

/s/ Mark N. Lampert

    
  Mark N. Lampert    
  President      

 

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