Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN 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 *
Shelnitz Mark A
   2. Issuer Name and Ticker or Trading Symbol
W R GRACE & CO [GRA] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP, GC and Secretary
(Last)
(First)
(Middle)
C/O W. R. GRACE & CO., 7500 GRACE DRIVE		 3. Date of Earliest Transaction (Month/Day/Year)
02/04/2016
(Street)

COLUMBIA, MD 21044		 4. If Amendment, Date Original Filed(Month/Day/Year)
02/08/2016		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock, par value $0.01 per share (1)               53,500 D  
Common Stock, par value $0.01 per share (1)               11,700.1544 (2) I By Trust

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Options (rights to buy) (3) $ 34.03               (4) 05/05/2016 Common Stock (1) 34,810   34,810 D  
Employee Stock Options (rights to buy) (3) $ 39.02               (5) 06/28/2017 Common Stock (1) 26,853   26,853 D  
Employee Stock Options (rights to buy) (3) $ 61.73               (6) 05/02/2018 Common Stock (1) 13,451   13,451 D  
Employee Stock Options (rights to buy) (3) $ 74.7               (7) 05/08/2019 Common Stock (1) 11,792   11,792 D  
Employee Stock Options (rights to buy) (3) $ 77.31               (8) 05/07/2020 Common Stock (1) 17,787   17,787 D  
Restricted Stock Units (3) (9)               (10)   (11) Common Stock (1) 3,557   3,557 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Shelnitz Mark A
C/O W. R. GRACE & CO.
7500 GRACE DRIVE
COLUMBIA, MD 21044		       VP, GC and Secretary  

Signatures

 Michael W. Conron, Attorney-in-Fact   02/08/2016
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(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) Each share of Common Stock also represents one Preferred Stock Purchase Right. Each such Right entitles the holder to purchase preferred stock or other securities or property upon the occurrence of certain events and subject to certain conditions.
(2) Includes 11,700.1544 shares of common stock beneficially owned by Mr. Shelnitz that will settle upon Mr. Shelnitz's termination of service.
(3) Adjusted on February 4, 2016 pursuant to the Employee Matters Agreement as described in the Remarks below.
(4) Options become exercisable in three substantially equal annual installments beginning on May 4,2012; May 3, 2013; and May 5,2014.
(5) Options become exercisable in three substantially equal annual installments beginning on June 28, 2013; June 27, 2014; and June 26, 2015.
(6) Options become exercisable in three substantially equal annual installments beginning on May 2, 2014; May 1, 2015; and May 2, 2016.
(7) Options become exercisable in three substantially equal annual installments beginning on May 8, 2015; May 6, 2016; and May 8, 2017.
(8) Options become exercisable in three substantially equal annual installments beginning on May 6, 2016; May 5, 2017; and May 7, 2018.
(9) Each RSU represents a contingent right to receive one share of Grace common stock.
(10) The RSUs vest in one installment on May 7, 2018.
(11) Not Applicable
 
Remarks:
The terms of each of the reporting person's outstanding options and restricted stock unit awards were adjusted pursuant to the Employee Matters Agreement among W. R. Grace & Co. ("Grace"), W. R. Grace & Co.Conn. and GCP Applied Technologies Inc. ("GCP") relating to the February 3, 2016 distribution by Grace to its stockholders of all of the outstanding shares of the common stock of GCP.  All information regarding options and restricted stock unit awards is shown on this Form 4 on a post-adjustment basis.

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