Louis L. Testoni, Director at Koppers Holdings Inc. (KOP), bought 4,100 shares at $24.68 ($101K) on 2016-05-23, disclosed to the SEC on 2016-05-24.
Seasonal purchase ($101k) by Director — this insider has traded KOP in May in at least three consecutive prior years. Pattern-driven, low signal.
Nothing distinguishes this filing.