UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(AMENDMENT NO. 1)*
ARENA PHARMACEUTICALS, INC.
(Name of Issuer)
COMMON STOCK
(Title of Class of Securities)
040047102
(CUSIP Number)
DECEMBER 31, 2009
(Date of Event Which Requires Filing 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 ("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. 040047102
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1. Names of Reporting Persons
BB BIOTECH AG
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2. Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [X]
(b) [ ]
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3. SEC Use Only
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4. Citizenship or Place of Organization
SWITZERLAND
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5. Sole Voting Power
0
Number of -----------------------------------------------------------------
Shares 6. Shared Voting Power
Beneficially
Owned by 5,431,980
Each -----------------------------------------------------------------
Reporting 7. Sole Dispositive Power
Person
with: 0
-----------------------------------------------------------------
8. Shared Dispositive Power
5,431,980
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9. Aggregate Amount Beneficially Owned by Each Reporting Person
5,431,980
--------------------------------------------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
[ ]
--------------------------------------------------------------------------------
11. Percent of Class Represented by amount in Row (9)
5.9%
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12. Type of Reporting Person (See Instructions)
HC,CO
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CUSIP No. 040047102
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1. Names of Reporting Persons
BIOTECH TARGET N.V.
I.R.S. Identification Nos. of above persons (entities only):
N/A
--------------------------------------------------------------------------------
2. Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [X]
(b) [ ]
--------------------------------------------------------------------------------
3. SEC Use Only
--------------------------------------------------------------------------------
4. Citizenship or Place of Organization
NETHERLANDS ANTILLES
--------------------------------------------------------------------------------
5. Sole Voting Power
0
Number of -----------------------------------------------------------------
Shares 6. Shared Voting Power
Beneficially
Owned by 5,431,980
Each -----------------------------------------------------------------
Reporting 7. Sole Dispositive Power
Person
with: 0
-----------------------------------------------------------------
8. Shared Dispositive Power
5,431,980
--------------------------------------------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person
5,431,980
--------------------------------------------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
[ ]
--------------------------------------------------------------------------------
11. Percent of Class Represented by amount in Row (9)
5.9%
--------------------------------------------------------------------------------
12. Type of Reporting Person (See Instructions)
CO
--------------------------------------------------------------------------------
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ITEM 4. OWNERSHIP
PROVIDE THE FOLLOWING INFORMATION REGARDING THE AGGREGATE NUMBER AND
PERCENTAGE OF THE CLASS OF SECURITIES OF THE ISSUER IDENTIFIED IN ITEM 1.
(A) AMOUNT BENEFICIALLY OWNED: 5,431,980
(B) PERCENT OF CLASS: 5.9%
(C) NUMBER OF SHARES AS TO WHICH THE PERSON HAS:
(I) SOLE POWER TO VOTE OR TO DIRECT THE VOTE 0
(II) SHARED POWER TO VOTE OR TO DIRECT THE VOTE 5,431,980
(III) SOLE POWER TO DISPOSE OR TO DIRECT THE DISPOSITION OF 0
(IV) SHARED POWER TO DISPOSE OR TO DIRECT THE DISPOSITION OF 5,431,980
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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.
SIGNATURES
After reasonable inquiry and the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.
BB BIOTECH AG
Date: FEBRUARY 3, 2010 By: /s/ MICHAEL HUTTER
--------------------------------
Signatory Authority
Name: MICHAEL HUTTER
Title: SIGNATORY AUTHORITY
Date: FEBRUARY 3, 2010 By: /s/ PASCAL SCHMUCKI
--------------------------------
Signatory Authority
Name: PASCAL SCHMUCKI
Title: SIGNATORY AUTHORITY
BIOTECH TARGET N.V.
Date: FEBRUARY 3, 2010 By: /s/ MICHAEL HUTTER
--------------------------------
Signatory Authority
Name: MICHAEL HUTTER
Title: SIGNATORY AUTHORITY
Date: FEBRUARY 3, 2010 By: /s/ PASCAL SCHMUCKI
--------------------------------
Signatory Authority
Name: PASCAL SCHMUCKI
Title: SIGNATORY AUTHORITY
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EXHIBIT INDEX
Exhibit A: Agreement by and between BB Biotech AG and Biotech Target N.V. with
respect to the filing of this disclosure statement.*
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* Previously filed.
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