Discovery Group I, Llc

Insider Trading: Purchases
Company Symbol Price Amount Relationship Remaining Holdings Date Form 4
ATRC $10.13 14,052 Large Shareholder 1,488,538 2011-02-24 Filing
ATRC $10.38 3,988 Large Shareholder 250,436 2011-02-23 Filing
ATRC $10.38 24,499 Large Shareholder 1,474,486 2011-02-23 Filing
ARTC $10.49 490 Large Shareholder 246,448 2011-01-20 Filing
ARTC $10.49 2,910 Large Shareholder 1,449,987 2011-01-20 Filing
ATRC $10.48 900 Large Shareholder 1,447,077 2011-01-05 Filing
ATRC $10.50 2,200 Large Shareholder 1,446,177 2011-01-04 Filing
ATRC $10.21 680 Large Shareholder 245,958 2011-01-03 Filing
ATRC $10.21 4,039 Large Shareholder 1,443,977 2011-01-03 Filing
ATRC $10.20 1,000 Large Shareholder 1,439,938 2010-12-31 Filing
ATRC $10.20 100 Large Shareholder 1,438,938 2010-12-30 Filing
ATRC $10.21 600 Large Shareholder 1,438,838 2010-12-29 Filing
ATRC $10.27 1,541 Large Shareholder 245,278 2010-12-28 Filing
ATRC $10.27 9,159 Large Shareholder 1,438,238 2010-12-28 Filing
ATRC $10.00 1,000 Large Shareholder 1,429,079 2010-12-20 Filing
ATRC $8.49 381 Large Shareholder 243,737 2010-11-30 Filing
ATRC $8.49 2,264 Large Shareholder 1,428,079 2010-11-30 Filing
ATRC $8.50 1,000 Large Shareholder 1,425,815 2010-11-29 Filing
ATRC $8.01 346 Large Shareholder 243,356 2010-11-16 Filing
ATRC $8.01 2,054 Large Shareholder 1,424,815 2010-11-16 Filing