UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13G
                               (Amendment No. 1)*

                    Under the Securities Exchange Act of 1934



                              ALTRA HOLDINGS, INC.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                    Common Stock, par value $0.001 per share
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    02208R106
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                December 31, 2008
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


Check the  appropriate box to designate the rule pursuant to which this Schedule
13G 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.   02208R106
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons:  WS Capital, L.L.C.

        I.R.S. Identification Nos. of Above Persons (entities only):

--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Texas
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        1,264,677*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   1,264,677*
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                  1,264,677*
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):    4.8%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person:     HC/OO
--------------------------------------------------------------------------------
* Based on information  set forth in the Quarterly  Report on Form 10-Q of Altra
Holdings, Inc. (the "Company") for the quarterly period ended September 27, 2008
and filed with the Securities and Exchange Commission on November 6, 2008, as of
November 3, 2008,  there were 26,395,209  shares of the Company's  common stock,
par value  $0.001  per share  (the  "Shares"),  issued  and  outstanding.  As of
December 31, 2008 (the "Reporting  Date"),  Walker Smith Capital,  L.P. ("WSC"),
Walker Smith Capital (Q.P.),  L.P.  ("WSCQP"),  Walker Smith International Fund,
Ltd. ("WS  International") and HHMI Investments,  L.P. ("HHMI," and collectively
with WSC,  WSCQP and WS  International,  the "WS Funds")  owned in the aggregate
1,264,677 Shares. WS Capital Management,  L.P. ("WSC Management") is the general
partner of WSC and WSCQP,  the agent and  attorney-in-fact  for WS International
and the investment  manager for HHMI. WS Capital,  L.L.C.  ("WS Capital") is the
general partner of WSC Management. Reid S. Walker and G. Stacy Smith are members
of WS Capital.  As a result,  WSC Management,  WS Capital,  and Messrs.  Reid S.
Walker  and G.  Stacy  Smith  possess  shared  power  to  vote  and  direct  the
disposition of the Shares held by the WS Funds. In addition, as of the Reporting
Date, WS Opportunity  Fund, L.P.  ("WSO") and WS Opportunity  Fund (Q.P.),  L.P.
("WSOQP," and together with WSO, the "WSO Funds") owned in the aggregate 162,195
Shares. WS Ventures Management,  L.P. ("WSVM") is the general partner of the WSO
Funds.  WSV Management,  L.L.C.  ("WSV") is the general partner of WSVM. Reid S.
Walker,  G. Stacy Smith,  and Patrick P. Walker are members of WSV. As a result,
WSVM,  WSV, and Messrs.  Reid S. Walker,  Patrick P. Walker,  and G. Stacy Smith
possess  shared power to vote and direct the  disposition  of the Shares held by
the WSO Funds.  Thus, as of the Reporting Date, for the purposes of Reg. Section
240.13d-3,  (i)  Messrs.  Reid S.  Walker  and G.  Stacy  Smith  are  deemed  to
beneficially own 1,426,872  Shares,  or approximately  5.4% of the Shares deemed
issued  and  outstanding  as of the  Reporting  Date,  (ii) WS  Capital  and WSC
Management are deemed to beneficially  own 1,264,677  Shares,  or  approximately
4.8% of the Shares deemed issued and  outstanding as of the Reporting  Date, and
(iii) WSVM, WSV and Mr. Patrick P. Walker are deemed to beneficially own 162,195
Shares, or approximately  0.6% of the Shares deemed issued and outstanding as of
the Reporting Date.  Each of the reporting  persons hereby  expressly  disclaims
membership in a "group" under  Section 13(d) of the  Securities  Exchange Act of
1934, as amended,  and the rules and regulations  thereunder with respect to the
Shares  reported  herein,  and this  Schedule 13G  Amendment  No. 1 shall not be
deemed to be an admission that any such  reporting  person is a member of such a
group.




CUSIP No.  02208R106
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons:  WS Capital Management, L.P.

        I.R.S. Identification Nos. of Above Persons (entities only):

--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Texas
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        1,264,677*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   1,264,677*
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                1,264,677*
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):    4.8%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person:     IA/PN
--------------------------------------------------------------------------------
* Based on information  set forth in the Quarterly  Report on Form 10-Q of Altra
Holdings, Inc. (the "Company") for the quarterly period ended September 27, 2008
and filed with the Securities and Exchange Commission on November 6, 2008, as of
November 3, 2008,  there were 26,395,209  shares of the Company's  common stock,
par value  $0.001  per share  (the  "Shares"),  issued  and  outstanding.  As of
December 31, 2008 (the "Reporting  Date"),  Walker Smith Capital,  L.P. ("WSC"),
Walker Smith Capital (Q.P.),  L.P.  ("WSCQP"),  Walker Smith International Fund,
Ltd. ("WS  International") and HHMI Investments,  L.P. ("HHMI," and collectively
with WSC,  WSCQP and WS  International,  the "WS Funds")  owned in the aggregate
1,264,677 Shares. WS Capital Management,  L.P. ("WSC Management") is the general
partner of WSC and WSCQP,  the agent and  attorney-in-fact  for WS International
and the investment  manager for HHMI. WS Capital,  L.L.C.  ("WS Capital") is the
general partner of WSC Management. Reid S. Walker and G. Stacy Smith are members
of WS Capital.  As a result,  WSC Management,  WS Capital,  and Messrs.  Reid S.
Walker  and G.  Stacy  Smith  possess  shared  power  to  vote  and  direct  the
disposition of the Shares held by the WS Funds. In addition, as of the Reporting
Date, WS Opportunity  Fund, L.P.  ("WSO") and WS Opportunity  Fund (Q.P.),  L.P.
("WSOQP," and together with WSO, the "WSO Funds") owned in the aggregate 162,195
Shares. WS Ventures Management,  L.P. ("WSVM") is the general partner of the WSO
Funds.  WSV Management,  L.L.C.  ("WSV") is the general partner of WSVM. Reid S.
Walker,  G. Stacy Smith,  and Patrick P. Walker are members of WSV. As a result,
WSVM,  WSV, and Messrs.  Reid S. Walker,  Patrick P. Walker,  and G. Stacy Smith
possess  shared power to vote and direct the  disposition  of the Shares held by
the WSO Funds.  Thus, as of the Reporting Date, for the purposes of Reg. Section
240.13d-3,  (i)  Messrs.  Reid S.  Walker  and G.  Stacy  Smith  are  deemed  to
beneficially own 1,426,872  Shares,  or approximately  5.4% of the Shares deemed
issued  and  outstanding  as of the  Reporting  Date,  (ii) WS  Capital  and WSC
Management are deemed to beneficially  own 1,264,677  Shares,  or  approximately
4.8% of the Shares deemed issued and  outstanding as of the Reporting  Date, and
(iii) WSVM, WSV and Mr. Patrick P. Walker are deemed to beneficially own 162,195
Shares, or approximately  0.6% of the Shares deemed issued and outstanding as of
the Reporting Date.  Each of the reporting  persons hereby  expressly  disclaims
membership in a "group" under  Section 13(d) of the  Securities  Exchange Act of
1934, as amended,  and the rules and regulations  thereunder with respect to the
Shares  reported  herein,  and this  Schedule 13G  Amendment  No. 1 shall not be
deemed to be an admission that any such  reporting  person is a member of such a
group.





CUSIP No.  02208R106
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons:  WSV Management, L.L.C.

        I.R.S. Identification Nos. of Above Persons (entities only):

--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Texas
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:          162,195*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:     162,195*
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                 162,195*
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):   0.6%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person: HC/OO
--------------------------------------------------------------------------------
* Based on information  set forth in the Quarterly  Report on Form 10-Q of Altra
Holdings, Inc. (the "Company") for the quarterly period ended September 27, 2008
and filed with the Securities and Exchange Commission on November 6, 2008, as of
November 3, 2008,  there were 26,395,209  shares of the Company's  common stock,
par value  $0.001  per share  (the  "Shares"),  issued  and  outstanding.  As of
December 31, 2008 (the "Reporting  Date"),  Walker Smith Capital,  L.P. ("WSC"),
Walker Smith Capital (Q.P.),  L.P.  ("WSCQP"),  Walker Smith International Fund,
Ltd. ("WS  International") and HHMI Investments,  L.P. ("HHMI," and collectively
with WSC,  WSCQP and WS  International,  the "WS Funds")  owned in the aggregate
1,264,677 Shares. WS Capital Management,  L.P. ("WSC Management") is the general
partner of WSC and WSCQP,  the agent and  attorney-in-fact  for WS International
and the investment  manager for HHMI. WS Capital,  L.L.C.  ("WS Capital") is the
general partner of WSC Management. Reid S. Walker and G. Stacy Smith are members
of WS Capital.  As a result,  WSC Management,  WS Capital,  and Messrs.  Reid S.
Walker  and G.  Stacy  Smith  possess  shared  power  to  vote  and  direct  the
disposition of the Shares held by the WS Funds. In addition, as of the Reporting
Date, WS Opportunity  Fund, L.P.  ("WSO") and WS Opportunity  Fund (Q.P.),  L.P.
("WSOQP," and together with WSO, the "WSO Funds") owned in the aggregate 162,195
Shares. WS Ventures Management,  L.P. ("WSVM") is the general partner of the WSO
Funds.  WSV Management,  L.L.C.  ("WSV") is the general partner of WSVM. Reid S.
Walker,  G. Stacy Smith,  and Patrick P. Walker are members of WSV. As a result,
WSVM,  WSV, and Messrs.  Reid S. Walker,  Patrick P. Walker,  and G. Stacy Smith
possess  shared power to vote and direct the  disposition  of the Shares held by
the WSO Funds.  Thus, as of the Reporting Date, for the purposes of Reg. Section
240.13d-3,  (i)  Messrs.  Reid S.  Walker  and G.  Stacy  Smith  are  deemed  to
beneficially own 1,426,872  Shares,  or approximately  5.4% of the Shares deemed
issued  and  outstanding  as of the  Reporting  Date,  (ii) WS  Capital  and WSC
Management are deemed to beneficially  own 1,264,677  Shares,  or  approximately
4.8% of the Shares deemed issued and  outstanding as of the Reporting  Date, and
(iii) WSVM, WSV and Mr. Patrick P. Walker are deemed to beneficially own 162,195
Shares, or approximately  0.6% of the Shares deemed issued and outstanding as of
the Reporting Date.  Each of the reporting  persons hereby  expressly  disclaims
membership in a "group" under  Section 13(d) of the  Securities  Exchange Act of
1934, as amended,  and the rules and regulations  thereunder with respect to the
Shares  reported  herein,  and this  Schedule 13G  Amendment  No. 1 shall not be
deemed to be an admission that any such  reporting  person is a member of such a
group.






CUSIP No.   02208R106
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons:  WS Ventures Management, L.P.

        I.R.S. Identification Nos. of Above Persons (entities only):

--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  Texas
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:          162,195*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:     162,195*
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                  162,195*
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):   0.6%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person:     IA/PN
--------------------------------------------------------------------------------
* Based on information  set forth in the Quarterly  Report on Form 10-Q of Altra
Holdings, Inc. (the "Company") for the quarterly period ended September 27, 2008
and filed with the Securities and Exchange Commission on November 6, 2008, as of
November 3, 2008,  there were 26,395,209  shares of the Company's  common stock,
par value  $0.001  per share  (the  "Shares"),  issued  and  outstanding.  As of
December 31, 2008 (the "Reporting  Date"),  Walker Smith Capital,  L.P. ("WSC"),
Walker Smith Capital (Q.P.),  L.P.  ("WSCQP"),  Walker Smith International Fund,
Ltd. ("WS  International") and HHMI Investments,  L.P. ("HHMI," and collectively
with WSC,  WSCQP and WS  International,  the "WS Funds")  owned in the aggregate
1,264,677 Shares. WS Capital Management,  L.P. ("WSC Management") is the general
partner of WSC and WSCQP,  the agent and  attorney-in-fact  for WS International
and the investment  manager for HHMI. WS Capital,  L.L.C.  ("WS Capital") is the
general partner of WSC Management. Reid S. Walker and G. Stacy Smith are members
of WS Capital.  As a result,  WSC Management,  WS Capital,  and Messrs.  Reid S.
Walker  and G.  Stacy  Smith  possess  shared  power  to  vote  and  direct  the
disposition of the Shares held by the WS Funds. In addition, as of the Reporting
Date, WS Opportunity  Fund, L.P.  ("WSO") and WS Opportunity  Fund (Q.P.),  L.P.
("WSOQP," and together with WSO, the "WSO Funds") owned in the aggregate 162,195
Shares. WS Ventures Management,  L.P. ("WSVM") is the general partner of the WSO
Funds.  WSV Management,  L.L.C.  ("WSV") is the general partner of WSVM. Reid S.
Walker,  G. Stacy Smith,  and Patrick P. Walker are members of WSV. As a result,
WSVM,  WSV, and Messrs.  Reid S. Walker,  Patrick P. Walker,  and G. Stacy Smith
possess  shared power to vote and direct the  disposition  of the Shares held by
the WSO Funds.  Thus, as of the Reporting Date, for the purposes of Reg. Section
240.13d-3,  (i)  Messrs.  Reid S.  Walker  and G.  Stacy  Smith  are  deemed  to
beneficially own 1,426,872  Shares,  or approximately  5.4% of the Shares deemed
issued  and  outstanding  as of the  Reporting  Date,  (ii) WS  Capital  and WSC
Management are deemed to beneficially  own 1,264,677  Shares,  or  approximately
4.8% of the Shares deemed issued and  outstanding as of the Reporting  Date, and
(iii) WSVM, WSV and Mr. Patrick P. Walker are deemed to beneficially own 162,195
Shares, or approximately  0.6% of the Shares deemed issued and outstanding as of
the Reporting Date.  Each of the reporting  persons hereby  expressly  disclaims
membership in a "group" under  Section 13(d) of the  Securities  Exchange Act of
1934, as amended,  and the rules and regulations  thereunder with respect to the
Shares  reported  herein,  and this  Schedule 13G  Amendment  No. 1 shall not be
deemed to be an admission that any such  reporting  person is a member of such a
group.





CUSIP No.   02208R106
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons:  Reid S. Walker

        I.R.S. Identification Nos. of Above Persons (entities only):

--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        1,426,872*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   1,426,872*
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                 1,426,872*
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):    5.4%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person:     IN
--------------------------------------------------------------------------------
* Based on information  set forth in the Quarterly  Report on Form 10-Q of Altra
Holdings, Inc. (the "Company") for the quarterly period ended September 27, 2008
and filed with the Securities and Exchange Commission on November 6, 2008, as of
November 3, 2008,  there were 26,395,209  shares of the Company's  common stock,
par value  $0.001  per share  (the  "Shares"),  issued  and  outstanding.  As of
December 31, 2008 (the "Reporting  Date"),  Walker Smith Capital,  L.P. ("WSC"),
Walker Smith Capital (Q.P.),  L.P.  ("WSCQP"),  Walker Smith International Fund,
Ltd. ("WS  International") and HHMI Investments,  L.P. ("HHMI," and collectively
with WSC,  WSCQP and WS  International,  the "WS Funds")  owned in the aggregate
1,264,677 Shares. WS Capital Management,  L.P. ("WSC Management") is the general
partner of WSC and WSCQP,  the agent and  attorney-in-fact  for WS International
and the investment  manager for HHMI. WS Capital,  L.L.C.  ("WS Capital") is the
general partner of WSC Management. Reid S. Walker and G. Stacy Smith are members
of WS Capital.  As a result,  WSC Management,  WS Capital,  and Messrs.  Reid S.
Walker  and G.  Stacy  Smith  possess  shared  power  to  vote  and  direct  the
disposition of the Shares held by the WS Funds. In addition, as of the Reporting
Date, WS Opportunity  Fund, L.P.  ("WSO") and WS Opportunity  Fund (Q.P.),  L.P.
("WSOQP," and together with WSO, the "WSO Funds") owned in the aggregate 162,195
Shares. WS Ventures Management,  L.P. ("WSVM") is the general partner of the WSO
Funds.  WSV Management,  L.L.C.  ("WSV") is the general partner of WSVM. Reid S.
Walker,  G. Stacy Smith,  and Patrick P. Walker are members of WSV. As a result,
WSVM,  WSV, and Messrs.  Reid S. Walker,  Patrick P. Walker,  and G. Stacy Smith
possess  shared power to vote and direct the  disposition  of the Shares held by
the WSO Funds.  Thus, as of the Reporting Date, for the purposes of Reg. Section
240.13d-3,  (i)  Messrs.  Reid S.  Walker  and G.  Stacy  Smith  are  deemed  to
beneficially own 1,426,872  Shares,  or approximately  5.4% of the Shares deemed
issued  and  outstanding  as of the  Reporting  Date,  (ii) WS  Capital  and WSC
Management are deemed to beneficially  own 1,264,677  Shares,  or  approximately
4.8% of the Shares deemed issued and  outstanding as of the Reporting  Date, and
(iii) WSVM, WSV and Mr. Patrick P. Walker are deemed to beneficially own 162,195
Shares, or approximately  0.6% of the Shares deemed issued and outstanding as of
the Reporting Date.  Each of the reporting  persons hereby  expressly  disclaims
membership in a "group" under  Section 13(d) of the  Securities  Exchange Act of
1934, as amended,  and the rules and regulations  thereunder with respect to the
Shares  reported  herein,  and this  Schedule 13G  Amendment  No. 1 shall not be
deemed to be an admission that any such  reporting  person is a member of such a
group.





CUSIP No.  02208R106
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons:  G. Stacy Smith

        I.R.S. Identification Nos. of Above Persons (entities only):

--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:        1,426,872*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:   1,426,872*
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                 1,426,872*
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):     5.4%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person:     IN
--------------------------------------------------------------------------------
* Based on information  set forth in the Quarterly  Report on Form 10-Q of Altra
Holdings, Inc. (the "Company") for the quarterly period ended September 27, 2008
and filed with the Securities and Exchange Commission on November 6, 2008, as of
November 3, 2008,  there were 26,395,209  shares of the Company's  common stock,
par value  $0.001  per share  (the  "Shares"),  issued  and  outstanding.  As of
December 31, 2008 (the "Reporting  Date"),  Walker Smith Capital,  L.P. ("WSC"),
Walker Smith Capital (Q.P.),  L.P.  ("WSCQP"),  Walker Smith International Fund,
Ltd. ("WS  International") and HHMI Investments,  L.P. ("HHMI," and collectively
with WSC,  WSCQP and WS  International,  the "WS Funds")  owned in the aggregate
1,264,677 Shares. WS Capital Management,  L.P. ("WSC Management") is the general
partner of WSC and WSCQP,  the agent and  attorney-in-fact  for WS International
and the investment  manager for HHMI. WS Capital,  L.L.C.  ("WS Capital") is the
general partner of WSC Management. Reid S. Walker and G. Stacy Smith are members
of WS Capital.  As a result,  WSC Management,  WS Capital,  and Messrs.  Reid S.
Walker  and G.  Stacy  Smith  possess  shared  power  to  vote  and  direct  the
disposition of the Shares held by the WS Funds. In addition, as of the Reporting
Date, WS Opportunity  Fund, L.P.  ("WSO") and WS Opportunity  Fund (Q.P.),  L.P.
("WSOQP," and together with WSO, the "WSO Funds") owned in the aggregate 162,195
Shares. WS Ventures Management,  L.P. ("WSVM") is the general partner of the WSO
Funds.  WSV Management,  L.L.C.  ("WSV") is the general partner of WSVM. Reid S.
Walker,  G. Stacy Smith,  and Patrick P. Walker are members of WSV. As a result,
WSVM,  WSV, and Messrs.  Reid S. Walker,  Patrick P. Walker,  and G. Stacy Smith
possess  shared power to vote and direct the  disposition  of the Shares held by
the WSO Funds.  Thus, as of the Reporting Date, for the purposes of Reg. Section
240.13d-3,  (i)  Messrs.  Reid S.  Walker  and G.  Stacy  Smith  are  deemed  to
beneficially own 1,426,872  Shares,  or approximately  5.4% of the Shares deemed
issued  and  outstanding  as of the  Reporting  Date,  (ii) WS  Capital  and WSC
Management are deemed to beneficially  own 1,264,677  Shares,  or  approximately
4.8% of the Shares deemed issued and  outstanding as of the Reporting  Date, and
(iii) WSVM, WSV and Mr. Patrick P. Walker are deemed to beneficially own 162,195
Shares, or approximately  0.6% of the Shares deemed issued and outstanding as of
the Reporting Date.  Each of the reporting  persons hereby  expressly  disclaims
membership in a "group" under  Section 13(d) of the  Securities  Exchange Act of
1934, as amended,  and the rules and regulations  thereunder with respect to the
Shares  reported  herein,  and this  Schedule 13G  Amendment  No. 1 shall not be
deemed to be an admission that any such  reporting  person is a member of such a
group.




CUSIP No.   02208R106
--------------------------------------------------------------------------------
(1)     Names of Reporting Persons:  Patrick P. Walker

        I.R.S. Identification Nos. of Above Persons (entities only):

--------------------------------------------------------------------------------
(2)     Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  [ ]                      (b)  [X]
--------------------------------------------------------------------------------

(3)     SEC Use Only
--------------------------------------------------------------------------------

(4)     Citizenship or Place of Organization:  United States
--------------------------------------------------------------------------------
 Number of Shares Beneficially Owned
   by Each Reporting Person           (5) Sole Voting Power:                  0*
                                          --------------------------------------
                                      (6) Shared Voting Power:          162,195*
                                          --------------------------------------
                                      (7) Sole Dispositive Power:             0*
                                          --------------------------------------
                                      (8) Shared Dispositive Power:     162,195*
                                          --------------------------------------
--------------------------------------------------------------------------------
(9)     Aggregate Amount Beneficially Owned by Each Reporting Person:
                   162,195*
--------------------------------------------------------------------------------

(10)    Check  Box if  the Aggregate Amount  in Row (9) Excludes  Certain Shares
        [  ]
--------------------------------------------------------------------------------

(11)    Percent of Class Represented by Amount in Row (9):    0.6%*
--------------------------------------------------------------------------------

(12)    Type of Reporting Person: IN
--------------------------------------------------------------------------------
* Based on information  set forth in the Quarterly  Report on Form 10-Q of Altra
Holdings, Inc. (the "Company") for the quarterly period ended September 27, 2008
and filed with the Securities and Exchange Commission on November 6, 2008, as of
November 3, 2008,  there were 26,395,209  shares of the Company's  common stock,
par value  $0.001  per share  (the  "Shares"),  issued  and  outstanding.  As of
December 31, 2008 (the "Reporting  Date"),  Walker Smith Capital,  L.P. ("WSC"),
Walker Smith Capital (Q.P.),  L.P.  ("WSCQP"),  Walker Smith International Fund,
Ltd. ("WS  International") and HHMI Investments,  L.P. ("HHMI," and collectively
with WSC,  WSCQP and WS  International,  the "WS Funds")  owned in the aggregate
1,264,677 Shares. WS Capital Management,  L.P. ("WSC Management") is the general
partner of WSC and WSCQP,  the agent and  attorney-in-fact  for WS International
and the investment  manager for HHMI. WS Capital,  L.L.C.  ("WS Capital") is the
general partner of WSC Management. Reid S. Walker and G. Stacy Smith are members
of WS Capital.  As a result,  WSC Management,  WS Capital,  and Messrs.  Reid S.
Walker  and G.  Stacy  Smith  possess  shared  power  to  vote  and  direct  the
disposition of the Shares held by the WS Funds. In addition, as of the Reporting
Date, WS Opportunity  Fund, L.P.  ("WSO") and WS Opportunity  Fund (Q.P.),  L.P.
("WSOQP," and together with WSO, the "WSO Funds") owned in the aggregate 162,195
Shares. WS Ventures Management,  L.P. ("WSVM") is the general partner of the WSO
Funds.  WSV Management,  L.L.C.  ("WSV") is the general partner of WSVM. Reid S.
Walker,  G. Stacy Smith,  and Patrick P. Walker are members of WSV. As a result,
WSVM,  WSV, and Messrs.  Reid S. Walker,  Patrick P. Walker,  and G. Stacy Smith
possess  shared power to vote and direct the  disposition  of the Shares held by
the WSO Funds.  Thus, as of the Reporting Date, for the purposes of Reg. Section
240.13d-3,  (i)  Messrs.  Reid S.  Walker  and G.  Stacy  Smith  are  deemed  to
beneficially own 1,426,872  Shares,  or approximately  5.4% of the Shares deemed
issued  and  outstanding  as of the  Reporting  Date,  (ii) WS  Capital  and WSC
Management are deemed to beneficially  own 1,264,677  Shares,  or  approximately
4.8% of the Shares deemed issued and  outstanding as of the Reporting  Date, and
(iii) WSVM, WSV and Mr. Patrick P. Walker are deemed to beneficially own 162,195
Shares, or approximately  0.6% of the Shares deemed issued and outstanding as of
the Reporting Date.  Each of the reporting  persons hereby  expressly  disclaims
membership in a "group" under  Section 13(d) of the  Securities  Exchange Act of
1934, as amended,  and the rules and regulations  thereunder with respect to the
Shares  reported  herein,  and this  Schedule 13G  Amendment  No. 1 shall not be
deemed to be an admission that any such  reporting  person is a member of such a
group.




Item 1(a).  Name of Issuer:  ALTRA HOLDINGS, INC.


Item 1(b).  Address of Issuer's Principal Executive Offices:
             14 Hayward Street
             Quincy, Massachusetts 02171


Item 2(a).  Name of Person Filing:
            WS Capital, L.L.C.
            WS Capital Management, L.P.
            WSV Management, L.L.C.
            WS Ventures Management, L.P.
            Reid S. Walker
            G. Stacy Smith
            Patrick P. Walker



Item 2(b).  Address of Principal Business Office or, if none, Residence:
            300 Crescent Court, Suite 1111
            Dallas, Texas  75201

Item 2(c).  Citizenship:
            WS Capital, L.L.C.:                Texas
            WS Capital Management, L.P.:       Texas
            WSV Management, L.L.C.:            Texas
            WS Ventures Management, L.P.:      Texas
            Reid S. Walker:                    United States
            G. Stacy Smith:                    United States
            Patrick P. Walker:                 United States

Item 2(d).  Title of Class of Securities:
            Common Stock, par value $0.001 per share

Item 2(e).  CUSIP Number:   02208R106

Item 3.     Not Applicable.

Item 4.  Ownership:

         (a)   Amount Beneficially Owned:
               WS Capital, L.L.C.                              1,264,677*
               WS Capital Management, L.P.                     1,264,677*
               WSV Management, L.L.C.                            162,195*
               WS Ventures Management, L.P.                      162,195*
               Reid S. Walker                                  1,426,872*
               G. Stacy Smith                                  1,426,872*
               Patrick P. Walker                                 162,195*



         (b)   Percent of Class:
               WS Capital, L.L.C.                                   4.8%*
               WS Capital Management, L.P.                          4.8%*
               WSV Management, L.L.C.                               0.6%*
               WS Ventures Management, L.P.                         0.6%*
               Reid S. Walker                                       5.4%*
               G. Stacy Smith                                       5.4%*
               Patrick P. Walker                                    0.6%*


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

               (i)   sole power to vote or to direct the vote:

                     WS Capital, L.L.C.                                0*
                     WS Capital Management, L.P.                       0*
                     WSV Management, L.L.C.                            0*
                     WS Ventures Management, L.P.                      0*
                     Reid S. Walker                                    0*
                     G. Stacy Smith                                    0*
                     Patrick P. Walker                                 0*

               (ii)  shared power to vote or to direct the vote:

                     WS Capital, L.L.C.                        1,264,677*
                     WS Capital Management, L.P.               1,264,677*
                     WSV Management, L.L.C.                      162,195*
                     WS Ventures Management, L.P.                162,195*
                     Reid S. Walker                            1,426,872*
                     G. Stacy Smith                            1,426,872*
                     Patrick P. Walker                           162,195*

               (iii) sole power to dispose or to direct the disposition of:

                     WS Capital, L.L.C.                                0*
                     WS Capital Management, L.P.                       0*
                     WSV Management, L.L.C.                            0*
                     WS Ventures Management, L.P.                      0*
                     Reid S. Walker                                    0*
                     G. Stacy Smith                                    0*
                     Patrick P. Walker                                 0*

               (iv)  shared power to dispose or to direct the disposition of:

                     WS Capital, L.L.C.                        1,264,677*
                     WS Capital Management, L.P.               1,264,677*
                     WSV Management, L.L.C.                      162,195*
                     WS Ventures Management, L.P.                162,195*
                     Reid S. Walker                            1,426,872*
                     G. Stacy Smith                            1,426,872*
                     Patrick P. Walker                           162,195*


* See footnote to cover pages.

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:

          Not applicable.

Item 7.  Identification  and  Classification of  Subsidiary Which  Acquired  the
         Securities:

          Not applicable.

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

          Not applicable.

Item 9.  Notice of Dissolution of Group:

          Not applicable.

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.





                                    SIGNATURE


          After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.

                                February 17, 2009


                                WS CAPITAL, L.L.C.

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member


                                WS CAPITAL MANAGEMENT, L.P.

                                By:  WS Capital, L.L.C., its general partner

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member


                                WSV MANAGEMENT, L.L.C.

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member


                                WS VENTURES MANAGEMENT, L.P.

                                By:  WSV Management, L.L.C., its general partner

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member



                                        /s/ Reid S. Walker
                                       -----------------------------------------
                                        REID S. WALKER



                                        /s/ G. Stacy Smith
                                       -----------------------------------------
                                        G. STACY SMITH



                                        /s/ Patrick P. Walker
                                       -----------------------------------------
                                        PATRICK P. WALKER



      Attention: Intentional misstatements or omissions of fact constitute
                Federal criminal violations (See 18 U.S.C. 1001)





                                                                       EXHIBIT 1

                             JOINT FILING AGREEMENT


In accordance with Rule 13d-1(k)  promulgated under the Securities  Exchange Act
of 1934, as amended, the persons named below agree to the joint filing on behalf
of each of them a Statement on Schedule 13G (including  amendments thereto) with
regard to the common stock of ALTRA  HOLDINGS,  INC. and further agree that this
Joint  Filing  Agreement  be  included as an Exhibit to such joint  filings.  In
evidence thereof,  the undersigned,  being duly authorized,  hereby execute this
Joint Filing Agreement as of February 17, 2009.



                                WS CAPITAL, L.L.C.

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member


                                WS CAPITAL MANAGEMENT, L.P.

                                By:  WS Capital, L.L.C., its general partner

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member


                                WSV MANAGEMENT, L.L.C.

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member


                                WS VENTURES MANAGEMENT, L.P.

                                By:  WSV Management, L.L.C., its general partner

                                By: /s/ Reid S. Walker
                                   ---------------------------------------------
                                    Reid S. Walker, Member



                                        /s/ Reid S. Walker
                                       -----------------------------------------
                                        REID S. WALKER



                                        /s/ G. Stacy Smith
                                       -----------------------------------------
                                        G. STACY SMITH



                                        /s/ Patrick P. Walker
                                       -----------------------------------------
                                        PATRICK P. WALKER