AVRX Avalon Pharmaceuticals (MM)

Avalon Pharmaceuticals, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

05346p106

(CUSIP Number)

February 5, 2009

(Date of Event which Required Filing of this Statement)

x

Rule 13d-1(b)

o

Rule 13d-1(c)

o

Rule 13d-1(d)

1

NAME OF REPORTING PERSON

SS. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

Ironwood Investment Management, LLC

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP         (a) o

(b) x

3

SEC USE ONLY

4

CITIZENSHIP OR PLACE OF ORGANIZATION

Massachusetts

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH

5

SOLE VOTING POWER

0

6

SHARED VOTING POWER

0

7

SOLE DISPOSITIVE POWER

0

8

SHARED DISPOSITIVE POWER

0

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

0

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES                  o

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

0

12

TYPE OF REPORTING PERSON

IA

Item 1.

(a).

Name of Issuer: Avalon Pharmaceuticals, Inc.

(b).

Address of Issuer's Principal Executive Offices:

20358 Seneca Meadows Parkway

Germantown, MD 20876

Item 2.

(a).

Name of Person Filing:

Ironwood Investment Management, LLC

(b).

Address of Principal Business Office or, if none, Residence:

Ironwood Investment Management, LLC

21 Custom House Street, Suite 240

Boston, MA 02110

(c).

Citizenship or Place of Organization: Massachusetts

(d).

Title of Class of Securities: Common Stock

(e).

CUSIP Number: 05346p106

Item 3.

If this statement is filed pursuant to sections 240.13d-1(b)

or 240.13d-2(b) or (c), check whether the person filing is a:

(a)

o Broker or dealer registered under section 15 of

the Act (15 U.S.C. 78o);

(b)

o Bank as defined in section 3(a)(6) of the

Act (15 U.S.C. 78c);

(c)

o Insurance company as defined in section 3(a)(19)

of the Act (15 U.S.C. 78c.);

(d)

o Investment company registered under section 8 of

the Investment Company Act of 1940 (15 U.S.C.

80a-8);

(e)

x An investment adviser in accordance with

section 240.13d-1(b)(1)(ii)(E);

(f)

o An employee benefit plan or endowment fund in

accordance with section 240.13d-1(b)(1)(ii)(F);

(g)

o A parent holding company or control person in

accordance with section 240.13d-1(b)(1)(ii)(G);

(h)

o A savings associations as defined in

section 3(b) of the Federal Deposit Insurance

Act (12 U.S.C. 1813);

(i)

o 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 (15 U.S.C. 80a-3);

(j)

o Group, in accordance with section 240.13d-1(b)(1)(ii)(J).

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:

0

(b).

Percent of class:

0 %

(c).

Number of shares as to which the person has:

(1)

Sole power to vote or to direct the vote:

0

(2)

Shared power to vote or to direct the vote:

0

(3)

Sole power to dispose or to direct the disposition of:

0

(4)

Shared power to dispose or to direct the disposition of:

0

Item 5.

Ownership of Five Percent or Less of a Class:

Item 6.

Ownership of More Than Five Percent on Behalf of Another

Person:

Item 7.

Identification and Classification of Subsidiaries which Acquired

the Security Being Reported on by the Parent Holding Company:

Not Applicable

Item 8.

Identification and Classification of Members of the Group:

Item 9.

Notice of Dissolution of Group:

Item 10.

Certification:

After reasonable inquiry and to the best of my knowledge and belief, I

IRONWOOD INVESTMENT MANAGEMENT, LLC

Date:

March 10, 2009

By:

_/s/ Charles J. Daly

Charles J. Daly, Chief Compliance Officer