E William Greehey

Insider Trading: Purchases

Symbol	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
NS	$62.93	4,600	$289,473.86	1,392,745	2011-06-03	Filing
NS	$62.95	17,855	$1,123,891.90	1,388,145	2011-06-02	Filing
NS	$62.86	7,445	$467,984.51	1,370,290	2011-05-26	Filing
NS	$62.67	45,900	$2,876,553.00	1,362,845	2011-05-25	Filing
NS	$63.14	38,000	$2,399,194.60	1,316,945	2011-05-11	Filing
NS	$64.10	38,000	$2,435,834.20	1,278,945	2011-05-10	Filing
NSH	$35.25	33	$1,163.25	7,258,706	2011-03-21	Filing
NSH	$35.25	600	$21,150.00	7,258,673	2011-03-18	Filing
NSH	$34.89	74,270	$2,591,399.13	7,258,073	2011-03-16	Filing
NS	$56.55	350,000	$19,792,500.00	1,239,871	2010-05-19	Filing
NSH	$28.99	6,500	$188,429.15	7,190,511	2010-03-15	Filing
NSH	$29.00	1,613	$46,777.00	7,184,011	2010-03-11	Filing
NSH	$29.00	103,450	$2,999,987.93	7,182,398	2010-03-05	Filing
NS	$58.59	75,900	$4,447,110.03	839,871	2010-03-03	Filing
NSH	$28.70	38,700	$1,110,643.56	7,017,448	2010-03-03	Filing
NS	$58.02	50,000	$2,900,920.00	889,871	2010-03-04	Filing
NSH	$28.83	61,500	$1,772,805.15	7,078,948	2010-03-04	Filing
NS	$57.78	11,800	$681,847.66	735,671	2010-03-01	Filing
NSH	$28.53	17,272	$492,842.70	6,978,748	2010-03-02	Filing
NS	$58.12	28,300	$1,644,733.74	763,971	2010-03-02	Filing