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

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                               (Amendment No. 4)*


                              Silgan Holdings Inc.
                              --------------------
                                (Name of Issuer)

                          Common Stock, $0.01 Par Value
                          -----------------------------
                         (Title of Class of Securities)

                                   827048 10 9
                                   -----------
                                 (CUSIP Number)


                                December 31, 2006
                                -----------------
                          (Date of Event Which Requires
                            Filing of this Statement)


     Check the  appropriate  box to  designate  the rule  pursuant to which this
Schedule is filed:

             [_] Rule 13d-1(b)

             [_] Rule 13d-1(c)

             [X] 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. 827048 10 9
--------------------------------------------------------------------------------

1.    Names of Reporting Persons                           R. Philip Silver

      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) [ ]

--------------------------------------------------------------------------------

3.    SEC Use Only

--------------------------------------------------------------------------------

4.    Citizenship or Place of Organization                 United States

--------------------------------------------------------------------------------

                           5. Sole Voting Power            5,598,419
     Number of
       Shares              -----------------------------------------------------
    Beneficially
     Owned by              6. Shared Voting Power          1,258,539
       Each
     Reporting             -----------------------------------------------------
      Person
       With:               7. Sole Dispositive Power       5,598,419

                           -----------------------------------------------------

                           8. Shared Dispositive Power     1,258,539

--------------------------------------------------------------------------------

9.    Aggregate Amount Beneficially Owned
      by Each Reporting Person                             6,856,958

--------------------------------------------------------------------------------

10.   Check if the Aggregate Amount in Row (9)             [ ]
      Excludes Certain Shares (See Instructions)

--------------------------------------------------------------------------------

11    Percent of Class Represented by Amount in Row (9)    18.3%

--------------------------------------------------------------------------------

12.   Type of Reporting Person (See Instructions)          IN

--------------------------------------------------------------------------------


                                  Page 2 of 8





CUSIP NO. 827048 10 9
--------------------------------------------------------------------------------

1.    Names of Reporting Persons                           D. Greg Horrigan

      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) [ ]

--------------------------------------------------------------------------------

3.    SEC Use Only

--------------------------------------------------------------------------------

4.    Citizenship or Place of Organization                 United States


                           5. Sole Voting Power            5,873,278
     Number of
      Shares               -----------------------------------------------------
    Beneficially
      Owned by             6. Shared Voting Power                  0
       Each
     Reporting             -----------------------------------------------------
      Person
       With:               7. Sole Dispositive Power       5,873,278

                           -----------------------------------------------------

                           8. Shared Dispositive Power             0

--------------------------------------------------------------------------------

9.    Aggregate Amount Beneficially Owned
      by Each Reporting Person                             5,873,278

--------------------------------------------------------------------------------

10.   Check if the Aggregate Amount in Row (9)             [ ]
      Excludes Certain Shares (See Instructions)

--------------------------------------------------------------------------------

11.   Percent of Class Represented by Amount in Row (9)    15.7%

--------------------------------------------------------------------------------

12.   Type of Reporting Person (See Instructions)          IN

--------------------------------------------------------------------------------


                                   Page 3 of 8







Item 1(a)   Name of Issuer:      Silgan Holdings Inc.
            --------------


Item 1(b)   Address of Issuer's Principal Executive Offices: 4 Landmark Square
            -----------------------------------------------  Stamford, CT  06901


Item 2(a)   Name of Person Filing:
            ---------------------

This statement is filed on behalf of the persons identified below. In accordance
with  Rule  13d-1(k)(1)  under  the  Act,  each  person  filing  this  statement
acknowledges  that he is responsible  for the  completeness  and accuracy of the
information  concerning  him  but is not  responsible  for the  completeness  or
accuracy of the  information  concerning  the other  persons  making the filing,
unless he knows or has reason to believe that such information is inaccurate.

                                R. Philip Silver
                                D. Greg Horrigan

Item 2(b)   Address of Principal Business Office or, if none, Residence:
            -----------------------------------------------------------

The  business  address  of R.  Philip  Silver is 4 Landmark  Square,  Suite 400,
Stamford, Connecticut 06901.

The  business  address  of D. Greg  Horrigan  is 4 Landmark  Square,  Suite 400,
Stamford, Connecticut 06901.



Item 2(c)   Citizenship:   Each of the  persons  filing this  statement  is a
            -----------    United States citizen.



Item 2(d) Title of Class of Securities:      Common Stock
          ----------------------------


Item 2(e) CUSIP Number:                      827048 10 9
          ------------

Item 3.   If this  statement  is filed  pursuant to section  240.13d-1(b)  or
          -------------------------------------------------------------------
          240.13d-2(b)   or  (c),   check   whether  the  person  filing  is  a:
          ---------------------------------------------------------------------


    (a)   [ ] Broker or dealer registered under Section 15 of the Act

    (b)   [ ] Bank as defined in Section 3(a)(6) of the Act

    (c)   [ ] Insurance company as defined in Section 3(a)(19) of the Act

    (d)   [ ] Investment company registered under Section 8 of the Investment
              Company Act of 1940

    (e)   [ ] An investment adviser in accordance with section 240.13d-1(b)
              (1)(ii)(E)


                                  Page 4 of 8





    (f)   [ ] An employee benefit plan or endowment fund in accordance with
              section 240.13d-1(b)(1)(ii)(F)

    (g)   [ ] A parent holding company or control person in accordance with
              section 240.13d-1(b)(1)(ii)(G)

    (h)   [ ] A savings association as defined in section 3(b) of the Federal
              Deposit Insurance Act

    (i)   [ ] 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

    (j)   [ ] Group, in accordance with section 240.13d-1(b)(1)(ii)(J)

    Not applicable.


Item 4.     Ownership:
            ---------

    (a)     Amount beneficially owned:

     As of December  31,  2006,  Mr.  Silver may be deemed to be the  beneficial
     owner of  6,856,958  shares of Common  Stock.  This amount  consists of (i)
     5,290,023 shares of Common Stock owned directly by Mr. Silver over which he
     has sole voting and  dispositive  power;  (ii)  1,258,539  shares of Common
     Stock owned by the Robert  Philip  Silver  2002 GRAT  Article III Trust for
     Benefit  of Spouse  and  Descendants  (of which  Mr.  Silver's  spouse is a
     co-trustee),  over which Mr. Silver may be deemed to have shared voting and
     dispositive  power;  and (iii) 308,396  shares of Common Stock owned by the
     Silver Family  Limited  Partnership of which Mr. Silver is the sole general
     partner with sole voting and dispositive  power. This amount excludes 1,313
     restricted stock units granted to Mr. Silver under the Silgan Holdings Inc.
     2004 Stock Incentive Plan, as amended,  which restricted stock units become
     fully  vested on June 7, 2007 at which  time they will be settled in shares
     of Common Stock on a one-for-one basis.

     As of December 31, 2006,  Mr.  Horrigan may be deemed to be the  beneficial
     owner of  5,873,278  shares of Common  Stock.  This amount  consists of (i)
     5,564,882  shares of Common Stock owned directly by Mr. Horrigan over which
     he has sole voting and dispositive power; and (ii) 308,396 shares of Common
     Stock  owned by the  Horrigan  Family  Limited  Partnership  of  which  Mr.
     Horrigan  is the sole  general  partner  with sole  voting and  dispositive
     power.  This amount  excludes 1,313  restricted  stock units granted to Mr.
     Horrigan  under the Silgan  Holdings  Inc.  2004 Stock  Incentive  Plan, as
     amended,  which  restricted stock units become fully vested on June 7, 2007
     at  which  time  they  will be  settled  in  shares  of  Common  Stock on a
     one-for-one basis.

    (b)     Percent of class:

     According to the Issuer's most recent  Quarterly  Report on Form 10-Q,  the
     number of shares outstanding of the Issuer's Common Stock as of October 31,
     2006 was


                                   Page 5 of 8




     37,428,891.  The shares of Common  Stock which Mr.  Silver may be deemed to
     beneficially own as of December 31, 2006 constitute  approximately 18.3% of
     such  total  number of shares of Common  Stock  outstanding.  The shares of
     Common  Stock which Mr.  Horrigan may be deemed to  beneficially  own as of
     December 31, 2006  constitute  approximately  15.7% of such total number of
     shares of Common Stock outstanding.

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

    Mr. Silver
    ----------
    (i)      Sole power to vote or to direct the vote:                 5,598,419
    (ii)     Shared power to vote or to direct the vote:               1,258,539
    (iii)    Sole power to dispose or to direct the disposition of:    5,598,419
    (iv)     Shared power to dispose or to direct the disposition of:  1,258,539

    Mr. Horrigan
    ------------
    (i)      Sole power to vote or to direct the vote:                 5,873,278
    (ii)     Shared power to vote or to direct the vote:                       0
    (iii)    Sole power to dispose or to direct the disposition of:    5,873,278
    (iv)     Shared power to dispose or to direct the disposition of:          0

Item 5.     Ownership of Five Percent or Less of a Class.
            --------------------------------------------

     If this  statement  is being  filed to report  the fact that as of the date
     hereof the reporting  person has ceased to be the beneficial  owner of more
     than five percent of the class of securities, check the following. [ ]


Item 6.     Ownership of More than Five Percent on Behalf of Another Person.
            ---------------------------------------------------------------

     Not applicable.

Item 7.     Identification and Classification of the Subsidiary Which Acquired
            ------------------------------------------------------------------
            the Security Being Reported on by the Parent Holding Company.
            ------------------------------------------------------------

    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.
            -------------

    Not applicable.


                                  Page 6 of 8






                                    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.



Dated:  January 24, 2007

                                                      /s/ R. Philip Silver
                                                      --------------------------
                                                      R. Philip Silver


                                                      /s/ D. Greg Horrigan
                                                      --------------------------
                                                      D. Greg Horrigan




                                  Page 7 of 8





                                    EXHIBIT 1

                             JOINT FILING AGREEMENT


     In  accordance  with Rule  13d-1(k)(1)  promulgated  under  the  Securities
Exchange  Act of 1934,  as amended,  the  undersigned  hereby agree to the joint
filing  with each  other on behalf  of each of them of this  Amendment  No. 4 to
Schedule  13G with  respect  to the  common  stock,  $.01 par  value,  of Silgan
Holdings  Inc.  This Joint Filing  Agreement  shall be included as an exhibit to
such Amendment No. 4 to Schedule 13G.

     IN WITNESS  WHEREOF,  the  undersigned  have  executed  this  Joint  Filing
Agreement as of the 24th day of January, 2007.


                                                      /s/ R. Philip Silver
                                                      --------------------------
                                                      R. Philip Silver


                                                      /s/ D. Greg Horrigan
                                                      --------------------------
                                                      D. Greg Horrigan


                                  Page 8 of 8