S David Utterberg

Insider Trading: Sales

Symbol	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
NXTM	$21.20	87,828	$1,861,953.60	6,064,731	2010-10-15	Filing
NXTM	$20.77	282,750	$5,871,586.50	6,152,559	2010-10-14	Filing
NXTM	$18.48	17,400	$321,578.10	6,435,309	2010-09-21	Filing
NXTM	$18.08	182,600	$3,300,823.68	6,452,709	2010-09-21	Filing
NXTM	$17.43	97,387	$1,697,153.51	6,635,309	2010-09-20	Filing
NXTM	$17.00	15,855	$269,517.56	6,732,696	2010-09-20	Filing
NXTM	$16.29	41,180	$670,636.89	6,748,551	2010-09-17	Filing
NXTM	$16.29	27,548	$448,773.45	6,789,731	2010-09-16	Filing
NXTM	$16.26	37,916	$616,650.66	6,817,279	2010-09-15	Filing
NXTM	$16.53	39,081	$645,836.97	6,855,195	2010-09-14	Filing
NXTM	$15.77	582,734	$9,188,433.17	6,894,276	2010-07-28	Filing
NXTM	$16.14	132,266	$2,134,416.12	7,477,010	2010-07-28	Filing
NXTM	$12.32	248,609	$3,064,056.20	7,609,276	2010-05-19	Filing
NXTM	$13.21	173,424	$2,291,329.92	7,857,885	2010-05-18	Filing
NXTM	$13.64	404,000	$5,509,186.40	8,031,309	2010-05-17	Filing
NXTM	$10.56	50,000	$528,100.00	8,435,309	2010-03-16	Filing