Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Leheny A. Rachel
 2. Date of Event Requiring Statement (Month/Day/Year)
02/23/2010		 3. Issuer Name and Ticker or Trading Symbol
Anthera Pharmaceuticals Inc [ANTH]
(Last)
(First)
(Middle)
C/O ANTHERA PHARMACEUTICALS, INC., 25801 INDUSTRIAL BOULEVARD, SUITE B		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

HAYWARD, CA 94545		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (right to buy)   (1) 02/18/2019 Common Stock 14,602 $ 1.51 D (2) (3)  
Series B-2 Convertible Preferred Stock   (4)   (4) Common Stock 481,033 $ (5) I See footnote (6) (7)
Stock Purchase Warrant   (8)   (8) Common Stock 120,258 $ 1.34 I See footnote (9) (10)

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Leheny A. Rachel
C/O ANTHERA PHARMACEUTICALS, INC.
25801 INDUSTRIAL BOULEVARD, SUITE B
HAYWARD, CA 94545		   X      

Signatures

/s/ Mitzi Chang, by power of attorney for A. Rachel Leheny, Ph.D. 02/23/2010
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) 100% of the shares subject to this Stock Option are immediately exercisable. However, all unvested shares underlying this Stock Option are subject to a right of repurchase held by the Issuer, which will lapse according to the following vesting schedule: 25% of the total number of shares vest on the first anniversary of the August 12, 2008 vesting start date (the "Vesting Start Date") and pro-rata monthly thereafter. This Stock Option is completely vested on the fourth anniversary of the Vesting Start Date
(2) The Reporting Person is (i) a Managing Director of Caxton Advantage Venture Partners, L.P., which is the General Partner of Caxton Advantage Life Sciences Fund, L.P. and (ii) a member of Advantage Life Sciences Partners LLC. Caxton Advantage Venture Partners, L.P. has voting power with respect to 50% of such shares. Decisions by Caxton Advantage Venture Partners, L.P. with respect to such shares are made by Advantage Life Sciences Partners, LLC, the Managing General Partner of Caxton Advantage Venture Partners, L.P., together with the investment committee of Caxton Advantage Venture Partners, L.P.
(3) The Reporting Person has the authority to take action on behalf of Advantage Life Sciences Partners, LLC as a member of Advantage Life Sciences Partners, LLC. The Reporting Person disclaims beneficial ownership, except to the extent of her proportionate pecuniary interest, either directly, or indirectly through Caxton Advantage Venture Partners, L.P. (or through any other entity which is a limited partner in Caxton Advantage Life Sciences Fund, L.P.), in Caxton Advantage Life Sciences Fund, L.P.
(4) The Series B-2 Convertible Preferred Stock is convertible on a one-for-one basis at any time at the holder's election and has no expiration date.
(5) Not applicable.
(6) The Series B-2 Convertible Preferred Stock is held by Caxton Advantage Life Sciences Fund, L.P. The Reporting Person is (i) a Managing Director of Caxton Advantage Venture Partners, L.P., which is the General Partner of Caxton Advantage Life Sciences Fund, L.P. and (ii) a member of Advantage Life Sciences Partners LLC. Caxton Advantage Venture Partners, L.P. has voting and investment power with respect to such shares. Decisions by Caxton Advantage Venture Partners, L.P. with respect to such shares are made by Advantage Life Sciences Partners, LLC, the Managing General Partner of Caxton Advantage Venture Partners, L.P., together with the investment committee of Caxton Advantage Venture Partners, L.P.
(7) The Reporting Person has the authority to take action on behalf of Advantage Life Sciences Partners, LLC as a member of Advantage Life Sciences Partners, LLC. The Reporting Person disclaims beneficial ownership, except to the extent of her proportionate pecuniary interest, either directly, or indirectly through Caxton Advantage Venture Partners, L.P. (or through any other entity which is a limited partner in Caxton Advantage Life Sciences Fund, L.P.), in Caxton Advantage Life Sciences Fund, L.P.
(8) This Warrant was issued on August 12, 2008 and is immediately exercisable. The Warrant will expire upon the occurrence of certain events, including the closing of the Issuer's initial public offering.
(9) The Warrant is held by Caxton Advantage Life Sciences Fund, L.P. The Reporting Person is (i) a Managing Director of Caxton Advantage Venture Partners, L.P., which is the General Partner of Caxton Advantage Life Sciences Fund, L.P. and (ii) a member of Advantage Life Sciences Partners LLC. Caxton Advantage Venture Partners, L.P. has voting and investment power with respect to such shares. Decisions by Caxton Advantage Venture Partners, L.P. with respect to such shares are made by Advantage Life Sciences Partners, LLC, the Managing General Partner of Caxton Advantage Venture Partners, L.P., together with the investment committee of Caxton Advantage Venture Partners, L.P.
(10) The Reporting Person has the authority to take action on behalf of Advantage Life Sciences Partners, LLC as a member of Advantage Life Sciences Partners, LLC. The Reporting Person disclaims beneficial ownership, except to the extent of her proportionate pecuniary interest, either directly, or indirectly through Caxton Advantage Venture Partners, L.P. (or through any other entity which is a limited partner in Caxton Advantage Life Sciences Fund, L.P.), in Caxton Advantage Life Sciences Fund, L.P.
 
Remarks:
Exhibit List
  Exhibit 24.1 - Power of Attorney

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