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


                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                               (Amendment No. _____) *


                                W.R. Grace & Co.
--------------------------------------------------------------------------------
                                (Name of Issuer)


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


                                    38388F108
            --------------------------------------------------------
                                 (CUSIP Number)


                                January 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)

         [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).


Potential persons who are to respond to the collection of information contained
in this form are not required to respond unless the form displays a currently
valid OMB control number.

                                Page 1 of 7 pages


CUSIP No.            38388F108
--------------------------------------------------------------------------------
1.   Names of Reporting Persons.    Max Holmes
     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                    5.   Sole Voting Power              3,854,300
Shares Bene-                 ---------------------------------------------------
ficially owned               6.   Shared Voting Power            0
by Each                      ---------------------------------------------------
Reporting                    7.   Sole Dispositive Power         3,854,300
Person With:                 ---------------------------------------------------
                             8.   Shared Dispositive Power       0
--------------------------------------------------------------------------------
9.   Aggregate Amount Beneficially Owned by Each Reporting Person

     3,854,300
--------------------------------------------------------------------------------
10.  Check if the Aggregate Amount in Row (11) Excludes Certain Shares
    (See Instructions)
                                                                             [ ]
--------------------------------------------------------------------------------
11.  Percent of Class Represented by Amount in Row (9)

     5.5%
--------------------------------------------------------------------------------
12.  Type of Reporting Person (See Instructions)

     IN
--------------------------------------------------------------------------------

                                Page 2 of 7 pages


CUSIP No.            38388F108
--------------------------------------------------------------------------------
1.   Names of Reporting Persons.    Plainfield Asset Management LLC
     I.R.S. Identification Nos. of above persons (entities only).   20-2332356
--------------------------------------------------------------------------------
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

     Delaware
--------------------------------------------------------------------------------
Number of                    5.   Sole Voting Power              3,854,300
Shares Bene-                 ---------------------------------------------------
ficially owned               6.   Shared Voting Power            0
by Each                      ---------------------------------------------------
Reporting                    7.   Sole Dispositive Power         3,854,300
Person With:                 ---------------------------------------------------
                             8.   Shared Dispositive Power       0
--------------------------------------------------------------------------------
9.   Aggregate Amount Beneficially Owned by Each Reporting Person

     3,854,300
--------------------------------------------------------------------------------
10.  Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                                                                             [ ]
--------------------------------------------------------------------------------
11.  Percent of Class Represented by Amount in Row (9)

     5.5%
--------------------------------------------------------------------------------
12.  Type of Reporting Person (See Instructions)

     OO
--------------------------------------------------------------------------------

                                Page 3 of 7 pages


CUSIP No.            38388F108
--------------------------------------------------------------------------------
1.   Names of Reporting Persons.    Plainfield Special Situation
                                    Master Fund Limited
     I.R.S. Identification Nos. of above persons (entities only).    98-0451872
--------------------------------------------------------------------------------
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

     Cayman Islands
--------------------------------------------------------------------------------
Number of                    5.   Sole Voting Power              3,854,300
Shares Bene-                 ---------------------------------------------------
ficially owned               6.   Shared Voting Power            0
by Each                      ---------------------------------------------------
Reporting                    7.   Sole Dispositive Power         3,854,300
Person With:                 ---------------------------------------------------
                             8.   Shared Dispositive Power       0
--------------------------------------------------------------------------------
9.   Aggregate Amount Beneficially Owned by Each Reporting Person

     3,854,300
--------------------------------------------------------------------------------
10.  Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)
                                                                             [ ]
--------------------------------------------------------------------------------
11.  Percent of Class Represented by Amount in Row (9)

     5.5%
--------------------------------------------------------------------------------
12.  Type of Reporting Person (See Instructions)

     CO
--------------------------------------------------------------------------------

                                Page 4 of 7 pages


Item 1.
(a)      The name of the issuer is W.R Grace & Co. (the "Issuer").
(b)      The principal executive office of the Issuer is located at 7500 Grace
         Drive, Columbia, Maryland 21044

Item 2.
(a)      The names of the persons filing this statement (the "Statement") are
         Max Holmes, Plainfield Asset Management LLC, a Delaware limited
         liability company ("Asset Management"), Plainfield Special Situation
         Master Fund Limited, a Cayman Islands corporation ("Master Fund")
         (collectively, the "Filers").
(b)      The Principal Business Office of the Filers is 55 Railroad Avenue,
         Third Floor, Greenwich, CT 06830.
(c)      For citizenship information see item 4 of the cover sheet of each
         Filer.
(d)      This Statement relates to the Common Stock, 0.01 par value, of the
         Issuer, including options to purchase the Common Stock.
(e)      The CUSIP Number of the Common Stock of the Issuer is 38388F108.


Item 3.  If this statement is filed pursuant to ss.ss.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 (15 U.S.C.
         78o).
(b) [ ]  Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).
(c) [ ]  Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C.
         78c).
(d) [ ]  Investment company registered under section 8 of the Investment Company
         Act of 1940 (15 U.S.C. 80a-8).
(e) [ ]  An investment adviser in accordance with ss.240.13d-1(b)(1)(ii)(E);
(f) [ ]  An employee benefit plan or endowment fund in accordance with
         ss.240.13d-1(b)(1)(ii)(F);
(g) [ ]  A parent holding company or control person in accordance with
         ss.240.13d-1(b)(1)(ii)(G);
(h) [ ]  A savings associations as defined in Section 3(b) of the Federal
         Deposit Insurance Act (12 U.S.C. 1813);
(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
         (15 U.S.C. 80a-3);
(j) [ ]  Group, in accordance with ss.240.13d-1(b)(1)(ii)(J);


Item 4. Ownership.

See Items 5-9 and 11 on the cover page for each filer. The ownership listed on
the cover page includes ownership as of February 10, 2006 of 1,000,000 shares of
Common Stock and options to acquire 2,854,300 shares of common stock. The
percentage ownership listed on the cover page has been calculated in accordance
with ss. 240.13d-3(d)(1) and is based upon 66,921,696 shares of the Issuer's
Common Stock outstanding on October 31, 2005, as reported in the Issuer's
Quarterly Report on Form 10-Q for the quarter ended September 30, 2005.

Max Holmes is the chief investment officer of Asset Management. Asset Management
is the Manager of Master Fund. Master Fund is a private investment vehicle
formed for the purpose of investing and trading in a wide variety of securities
and financial instruments. The Common Stock was purchased by Master Fund.

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

Instruction. For computations regarding securities which represent a right to
acquire an underlying security see ss.240.13d-3(d)(1).

                                Page 5 of 7 pages


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.

Instruction: Dissolution of a group requires a response to this item.

Item 6.  Ownership of More than Five Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct
the receipt of dividends from, or the proceeds from the sale of, such
securities, a statement to that effect should be included in response to this
item and, if such interest relates to more than five percent of the class, such
person should be identified. A listing of the shareholders of an investment
company registered under the Investment Company Act of 1940 or the beneficiaries
of employee benefit plan, pension fund or endowment fund is not required.

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

If a parent holding company or control person has filed this schedule, pursuant
to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit
stating the identity and the Item 3 classification of the relevant subsidiary.
If a parent holding company or control person has filed this schedule pursuant
to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification
of the relevant subsidiary.
                                                            EXHIBIT ATTACHED [ ]

Item 8.  Identification and Classification of Members of the Group

If a group has filed this schedule pursuant to Rule 13d-1(b)(1)(ii)(J), so
indicate under Item 3(j) and attach an exhibit stating the identity and Item 3
classification of each member of the group. If a group has filed this schedule
pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the
identity of each member of the group.

Item 9.  Notice of Dissolution of Group

Notice of dissolution of a group may be furnished as an exhibit stating the date
of the dissolution and that all further filings with respect to transactions in
the security reported on will be filed, if required, by members of the group, in
their individual capacity. See Item 5.
                                                            EXHIBIT ATTACHED [ ]

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.

                                Page 6 of 7 pages


                                    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:    February 14, 2006

                                       /s/ MAX HOLMES
                                       -----------------------------------------
                                       MAX HOLMES


                                       PLAINFIELD ASSET MANAGEMENT LLC

                                       By: /s/ THOMAS X. FRITSCH
                                           -------------------------------------
                                          Thomas X. Fritsch
                                          Senior Vice President and
                                          General Counsel


                                       PLAINFIELD SPECIAL SITUATION MASTER FUND
                                        LIMITED

                                       By:  Plainfield Asset Management LLC

                                       By: /s/ THOMAS X. FRITSCH
                                           -------------------------------------
                                           Thomas X. Fritsch
                                           Senior Vice President and
                                           General Counsel


The original statement shall be signed by each person on whose behalf the
statement is filed or his authorized representative. If the statement is signed
on behalf of a person by his authorized representative other than an executive
officer or general partner of the filing person, evidence of the
representative's authority to sign on behalf of such person shall be filed with
the statement, provided, however, that a power of attorney for this purpose
which is already on file with the Commission may be incorporated by reference.
The name and any title of each person who signs the statement shall be typed or
printed beneath his signature.

Note: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See ss.240.13d-7 for other
parties for whom copies are to be sent.

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


                                Page 7 of 7 pages



                                                                       EXHIBIT A

               JOINT FILING AGREEMENT PURSUANT TO RULE 13D-1(K)(1)

This agreement is made pursuant to Rule 13d-1(k)(1) under the Securities
Exchange Act of 1934, as amended (the "Act") by and among the parties listed
below, each referred to herein as a "Joint Filer." The Joint Filers agree that a
statement of beneficial ownership as required by Section 13(d) of the Act and
the Rules thereunder may be filed on each of their behalf on Schedule 13D or
Schedule 13G, as appropriate, and that said joint filing may thereafter be
amended by further joint filings. The Joint Filers state that they each satisfy
the requirements for making a joint filing under Rule 13d-1.

Dated: February 14, 2006

                                       /s/ MAX HOLMES
                                       -----------------------------------------
                                       MAX HOLMES


                                       PLAINFIELD SPECIAL SITUATION MASTER FUND
                                        LIMITED, a Cayman Islands corporation

                                       By: PLAINFIELD ASSET MANAGEMENT LLC
                                           Its Manager

                                           By: /s/ THOMAS X. FRITSCH
                                               ---------------------------------
                                               Thomas X. Fritsch
                                               Senior Vice President and
                                               General Counsel


                                       PLAINFIELD ASSET MANAGEMENT LLC

                                        By: /s/ THOMAS X. FRITSCH
                                            ------------------------------------
                                            Thomas X. Fritsch
                                            Senior Vice President and
                                            General Counsel