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 *
  BB BIOVENTURES L P
2. Date of Event Requiring Statement (Month/Day/Year)
02/09/2006
3. Issuer Name and Ticker or Trading Symbol
ACORDA THERAPEUTICS INC [ACOR]
(Last)
(First)
(Middle)
C/O MPM ASSET MANAGEMENT, 200 CLARENDON STREET, 54TH FLOOR
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

BOSTON, MA 02116
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ 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
Series E-1 Convertible Preferred Stock   (1)   (1) Common Stock 125,161 (2) $ 13.806 (2) I See Footnote (3)
Series E-2 Convertible Preferred Stock   (1)   (1) Common Stock 381,965 (2) $ 13.806 (2) I See Footnote (4)
Series H Convertible Preferred Stock   (1)   (1) Common Stock 6,518 (2) $ 15.3348 (2) I See Footnote (5)
Series I Convertible Preferred Stock   (1)   (1) Common Stock 145,330 (2) $ 17.1132 (2) I See Footnote (6)
Series J Convertible Preferred Stock   (1)   (1) Common Stock 981,159 (2) $ 7.644 (2) I See Footnote (7)

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
BB BIOVENTURES L P
C/O MPM ASSET MANAGEMENT
200 CLARENDON STREET, 54TH FLOOR
BOSTON, MA 02116
    X    
BAB BIO VENTURES LLP
C/O MPM ASSET MANAGEMENT
200 CLARENDON STREET, 54TH FLOOR
BOSTON, MA 02116
    X    
BAB BIO VENTURES NV
C/O MPM ASSET MANAGEMENT
200 CLARENDON STREET, 54TH FLOOR
BOSTON, MA 02116
    X    
MPM ASSET MANAGEMENT INVESTORS 1998 LLC
C/O MPM ASSET MANAGEMENT
200 CLARENDON STREET, 54TH FLOOR
BOSTON, MA 02116
    X    
MPM BIOVENTURES PARALLEL FUND L P
C/O MPM ASSET MANAGEMENT
200 CLARENDON STREET, 54TH FLOOR
BOSTON, MA 02116
    X    
MPM BIOVENTURES I LP
C/O MPM ASSET MANAGEMENT
200 CLARENDON STREET, 54TH FLOOR
BOSTON, MA 02116
    X    
MPM BIO VENTURES I LLC
C/O MPM ASSET MANAGEMENT
200 CLARENDON STREET, 54TH FLOOR
BOSTON, MA 02116
    X    
GADICKE ANSBERT
C/O MPM ASSET MANAGEMENT
200 CLARENDON STREET, 54TH FLOOR
BOSTON, MA 02116
    X    
EVNIN LUKE
C/O MPM ASSET MANAGEMENT
200 CLARENDON STREET, 54TH FLOOR
BOSTON, MA 02116
    X    

Signatures

By Ansbert Gadicke, manager director of BAB BioVentures NV, the general partner of BAB BioVentures L.P., the general partner of BB BioVentures L.P. /s/ Ansbert Gadicke 02/09/2006
**Signature of Reporting Person Date

By Ansbert Gadicke, manager director of BAB BioVentures NV, the general partner of BAB BioVentures L.P. /s/ Ansbert Gadicke 02/09/2006
**Signature of Reporting Person Date

By Ansbert Gadicke, manager director of BAB BioVentures NV /s/ Ansbert Gadicke 02/09/2006
**Signature of Reporting Person Date

By Michael Steinmetz, manager of MPM Asset Management Investors 1998 LLC /s/ Michael Steinmetz 02/09/2006
**Signature of Reporting Person Date

By Michael Steinmetz, manager of MPM BioVentures I LLC, the general partner of MPM BioVentures I L.P., the general partner of MPM BioVentures Parallel Fund, L.P. /s/ Michael Steinmetz 02/09/2006
**Signature of Reporting Person Date

By Michael Steinmetz, manager of MPM BioVentures I LLC, the general partner of MPM BioVentures I L.P. /s/ Michael Steinmetz 02/09/2006
**Signature of Reporting Person Date

By Michael Steinmetz, manager of MPM BioVentures I LLC /s/ Michael Steinmetz 02/09/2006
**Signature of Reporting Person Date

/s/ Luke Evnin 02/09/2006
**Signature of Reporting Person Date

/s/ Ansbert Gadicke 02/09/2006
**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) The convertible preferred stock is convertible at any time, at the holder's discretion, and has no expiration date.
(2) The number of shares underlying convertible preferred stock in column 3 of Table II represents the number of shares of Common Stock of the Issuer that the convertible preferred stock will automatically convert into upon the closing of the Issuer's initial public offering.
(3) These shares are held as follows: 114,686 shares by BB BioVentures, L.P. ("BBBV"), 1,439 shares by MPM Asset Management Investors 1998 LLC ("AM 1998") and 9,036 shares by MPM BioVentures Parallel Fund, L.P. ("BV PF"). MPM BioVentures I, L.P. ("BV I") and MPM BioVentures I LLC ("BV I LLC") are the direct and indirect general partners of BV PF. BAB BioVentures L.P. ("BAB BV"), BAB BioVentures, N.V. ("BAB NV") and BV I LLC are the direct and indirect general partners of BB BV. Luke Evnin, Ansbert Gadicke and Michael Steinmetz are the managers of AM 1998 and BV I LLC. Each member of the group disclaims beneficial ownership of all such shares except to the extent of their respective proportionate pecuniary interests therein.
(4) These shares are held as follows: 349,996 shares by BBBV, 4,392 shares by AM 1998 and 27,577 shares by BV PF. BV I and BV I LLC are the direct and indirect general partners of BV PF. BAB BV, BAB NV and BV I LLC are the direct and indirect general partners of BB BV. Luke Evnin, Ansbert Gadicke and Michael Steinmetz are the managers of AM 1998 and BV I LLC. Each member of the group disclaims beneficial ownership of all such shares except to the extent of their respective proportionate pecuniary interests therein.
(5) These shares are held as follows: 5,674 shares by BBBV, 74 shares by AM 1998 and 770 shares by BV PF. BV I and BV I LLC are the direct and indirect general partners of BV PF. BAB BV, BAB NV and BV I LLC are the direct and indirect general partners of BB BV. Luke Evnin, Ansbert Gadicke and Michael Steinmetz are the managers of AM 1998 and BV I LLC. Each member of the group disclaims beneficial ownership of all such shares except to the extent of their respective proportionate pecuniary interests therein.
(6) These shares are held as follows: 124,840 shares by BBBV, 1,670 shares by AM 1998 and 18,820 shares by BV PF. BV I and BV I LLC are the direct and indirect general partners of BV PF. BAB BV, BAB NV and BV I LLC are the direct and indirect general partners of BB BV. Luke Evnin, Ansbert Gadicke and Michael Steinmetz are the managers of AM 1998 and BV I LLC. Each member of the group disclaims beneficial ownership of all such shares except to the extent of their respective proportionate pecuniary interests therein.
(7) These shares are held as follows: 870,999 shares by BBBV, 11,283 shares by AM 1998 and 98,877 shares by BV PF. BV I and BV I LLC are the direct and indirect general partners of BV PF. BAB BV, BAB NV and BV I LLC are the direct and indirect general partners of BB BV. Luke Evnin, Ansbert Gadicke and Michael Steinmetz are the managers of AM 1998 and BV I LLC. Each member of the group disclaims beneficial ownership of all such shares except to the extent of their respective proportionate pecuniary interests therein.

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