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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1045309	W R Grace & Co	GRA	Chemicals & Allied Products (2800)	650773649

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1194927	A Thomas Vanderslice	C/O W. R. Grace &Amp; Co. 7500 Grace Drive Columbia MD 21044		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock, Par Value $0.01 Per Share	Acquisiton	2010-10-28	69,876	$3.22	109,398	No	4	M	Direct
Common Stock, Par Value $0.01 Per Share	Disposition	2010-10-28	69,876	$32.02	39,522	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Director Stock Options (rights to buy)	Acquisiton	2010-10-28	69,876	$0.00	69,876	$3.22

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2001-01-02	2011-01-01	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock, Par Value $0.01 Per Share	14,932	Indirect	By Trust
Common Stock, Par Value $0.01 Per Share	14,932	Indirect	By Trust

Footnotes

Each share of Common stock also represents one Preferred Share 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.
Exercise and sale pursuant to Rule 10b5-1 Trading Plan for options issued January 2, 2001 expiring January 1, 2011.
Such shares are held in a trust established by the issuer for the benefit of certain officers and directors.