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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
72020	Nicor Inc	GAS	Natural Gas Distribution (4924)	362855175

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1192190	M Russ Strobel	Nicor Inc. 1844 Ferry Road Naperville IL 60563	Chairman, President And Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Disposition	2011-08-16	2,424	$53.50	26,298	No	4	S	Direct
Common Stock	Disposition	2011-08-16	1,300	$53.51	24,998	No	4	S	Direct
Common Stock	Disposition	2011-08-16	1,353	$53.52	23,645	No	4	S	Direct
Common Stock	Disposition	2011-08-16	3,195	$53.53	20,450	No	4	S	Direct
Common Stock	Disposition	2011-08-16	2,266	$53.54	18,184	No	4	S	Direct
Common Stock	Disposition	2011-08-16	600	$53.55	17,584	No	4	S	Direct
Common Stock	Disposition	2011-08-16	400	$53.59	17,184	No	4	S	Direct
Common Stock	Disposition	2011-08-16	100	$53.62	17,084	No	4	S	Direct
Common Stock	Disposition	2011-08-16	1,100	$53.62	15,984	No	4	S	Direct
Common Stock	Disposition	2011-08-16	105	$53.64	15,879	No	4	S	Direct
Common Stock	Disposition	2011-08-16	500	$53.66	15,379	No	4	S	Direct
Common Stock	Disposition	2011-08-16	100	$53.72	15,279	No	4	S	Direct
Common Stock	Disposition	2011-08-16	100	$53.73	15,179	No	4	S	Direct
Common Stock	Disposition	2011-08-16	100	$53.74	15,079	No	4	S	Direct
Common Stock	Disposition	2011-08-17	1,464	$53.65	13,615	No	4	S	Direct
Common Stock	Disposition	2011-08-17	700	$53.68	12,915	No	4	S	Direct
Common Stock	Disposition	2011-08-17	1,661	$53.69	11,254	No	4	S	Direct
Common Stock	Disposition	2011-08-17	2,028	$53.70	9,226	No	4	S	Direct
Common Stock	Disposition	2011-08-17	4	$53.71	9,222	No	4	S	Direct
Common Stock	Disposition	2011-08-17	400	$53.72	8,822	No	4	S	Direct
Common Stock	Disposition	2011-08-17	100	$53.73	8,722	No	4	S	Direct

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

Footnotes

Includes 651.587 shares of Common Stock acquired under the Nicor Inc. Employee Stock Purchase Plan in June, September and December 2010 and March and June 2011.
Includes 378.238 shares of Common Stock acquired under the Nicor Inc. Dividend Reinvestment Plan in August and November 2010 and February, May and August 2011.