R John Letcher

Insider Trading: Sales

Symbol	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
PKI	$45.51	9,900	$450,549.00	34,514	2014-03-11	Filing
PKI	$45.36	31,100	$1,410,727.10	34,514	2014-03-10	Filing
PKI	$36.18	16,000	$578,928.00	33,044	2013-08-06	Filing
PKI	$27.28	5,000	$136,400.00	31,273	2012-09-04	Filing