Statement of Changes in Beneficial Ownership (4)

FORM 4

[X] 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

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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person * La Force Andrew Hudson III	2. Issuer Name and Ticker or Trading Symbol W R GRACE & CO [ GRA ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director                    _____ 10% Owner __X__ Officer (give title below)    _____ Other (specify below) President and CEO
(Last)          (First)          (Middle) C/O W. R. GRACE & CO., 7500 GRACE DRIVE	3. Date of Earliest Transaction (MM/DD/YYYY) 9/22/2021
(Street) COLUMBIA, MD 21044 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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	9/21/2021		G	V	50000	D	$0	73107	D
Common Stock, par value $0.01 per share	9/22/2021		D		73107	D	(1)	0	D
Common Stock, par value $0.01 per share	9/22/2021		A		68335 (2)	A	(1)	68335	D
Common Stock, par value $0.01 per share	9/22/2021		D		68335 (2)	D	(1)	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		7. Title and Amount of Securities Underlying Derivative Security (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
Restricted Stock Units	(3)	9/22/2021		D			52069	(4)	(4)	Common Stock	52069.0	(4)	0	D
Employee Stock Options (rights to buy)	$67.335	9/22/2021		D			26546	(5)	(5)	Common Stock	26546.0	(5)	0	D
Employee Stock Options (rights to buy)	$55.405	9/22/2021		D			83747	(5)	(5)	Common Stock	83747.0	(5)	0	D

Explanation of Responses:
(1)	This Form 4 reports securities disposed of pursuant to the Agreement & Plan of Merger (the "Merger Agreement"), dated April 26, 2021, among W. R. Grace & Co. ("Company"), W. R. Grace Holdings LLC (fka Gibraltar Acquisition Holdings LLC), a Delaware limited liability company ("Parent"), and Gibraltar Merger Sub Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Merger Sub"), filed as Exhibit 2.1 to the Company's Form 8-K filed with the SEC on April 26, 2021, pursuant to which on Sept. 22, 2021, Merger Sub merged with and into the Company (the "Merger") and pursuant to which the Company survived the Merger as a wholly owned subsidiary of Parent. At the effective time of the Merger (the "Effective Time"), each issued & outstanding share of Company common stock was cancelled and converted into the right to receive $70.00 in cash (the "Merger Consideration") without interest, subject to withholding taxes.
(2)	Represents performance-based awards that became vested and were converted at the Effective Time into the right to receive an amount in cash (without interest) equal to the product of the Merger Consideration multiplied by the number of shares of common stock of the Company subject to such award immediately prior to the Effective Time, which converted cash award will be subject to continued service vesting and other terms described in the Merger Agreement.
(3)	Each restricted stock unit represented a contingent right to receive one share of Common Stock or at the Company's election, the cash value thereof.
(4)	At the Effective Time, each outstanding restricted stock unit converted into the right to receive an amount in cash (without interest) equal to the product of the Merger Consideration multiplied by the number of shares of common stock of the Company subject to such award immediately prior to the Effective Time, which converted cash award will be subject to continued service vesting and other terms described in the Merger Agreement.
(5)	At the Effective Time, each outstanding option to acquire shares of common stock of the Company was cancelled and converted into the right to receive the product of the excess, if any, of the Merger Consideration over the applicable exercise price of such option, multiplied by the total number of shares of common stock of the Company subject to such option. Any options that had an exercise price per share that was equal to or greater than the Merger Consideration were cancelled for no consideration.

Remarks: This Form 4 reports securities disposed of pursuant to the Agreement & Plan of Merger (the "Merger Agreement"), dated April 26, 2021, among W. R. Grace & Co. ("Company"), W. R. Grace Holdings LLC (fka Gibraltar Acquisition Holdings LLC), a Delaware limited liability company ("Parent"), and Gibraltar Merger Sub Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Merger Sub"), filed as Exhibit 2.1 to the Company's Form 8-K filed with the SEC on April 26, 2021, pursuant to which on Sept. 22, 2021, Merger Sub merged with and into the Company (the "Merger") and pursuant to which the Company survived the Merger as a wholly owned subsidiary of Parent.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
La Force Andrew Hudson III C/O W. R. GRACE & CO. 7500 GRACE DRIVE COLUMBIA, MD 21044	X		President and CEO

Signatures
/s/ Sean E. Dempsey, Attorney-in-Fact		9/22/2021
**Signature of Reporting Person		Date