Discovery Group I, Llc

Insider Trading: Purchases
Company Symbol Price Amount Relationship Remaining Holdings Date Form 4
ATRC $9.65 4,300 Large Shareholder 1,574,892 2011-03-11 Filing
ATRC $9.51 608 Large Shareholder 266,081 2011-03-10 Filing
ATRC $9.51 3,735 Large Shareholder 1,570,592 2011-03-10 Filing
ATRC $9.86 287 Large Shareholder 265,473 2011-03-09 Filing
ATRC $9.86 1,760 Large Shareholder 1,566,857 2011-03-09 Filing
ATRC $10.05 2,699 Large Shareholder 265,186 2011-03-08 Filing
ATRC $10.05 16,583 Large Shareholder 1,565,097 2011-03-08 Filing
ATRC $10.04 378 Large Shareholder 262,487 2011-03-07 Filing
ATRC $10.04 2,322 Large Shareholder 1,548,514 2011-03-07 Filing
ATRC $10.05 700 Large Shareholder 262,109 2011-03-04 Filing
ATRC $10.05 4,300 Large Shareholder 1,546,192 2011-03-04 Filing
ATRC $10.10 5,740 Large Shareholder 261,409 2011-03-02 Filing
ATRC $10.10 35,260 Large Shareholder 1,541,892 2011-03-02 Filing
ATRC $10.09 580 Large Shareholder 1,797,561 2011-03-01 Filing
ATRC $10.09 3,560 Large Shareholder 1,506,632 2011-03-01 Filing
ATRC $10.08 1,666 Large Shareholder 1,758,161 2011-02-28 Filing
ATRC $10.08 10,234 Large Shareholder 1,503,072 2011-02-28 Filing
ATRC $10.08 700 Large Shareholder 253,423 2011-02-25 Filing
ATRC $10.08 4,300 Large Shareholder 1,492,838 2011-02-25 Filing
ATRC $10.13 2,287 Large Shareholder 252,723 2011-02-24 Filing