Dean M. Harrison, Director at NORTHERN TRUST CORP (NTRS), sold 2 shares at $90.13 ($180) on 2017-05-01, disclosed to the SEC on 2018-04-03.
Seasonal sale ($180) by Director — this insider has traded NTRS in May in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.