Beowulf Mining: Cantor Fitzgerald places its target price under review, while keeping a buy recommendation.Cairn Energy: Investec ups target price from 220p to 245p and reiterates a buy recommendation.Carillion: Oriel reinstates with a target price of 402p and a buy recommendation.Gem Diamonds: Westhouse Securities downgrades from buy to add with a target price of 235p.Genel Energy: Investec cuts target price from 1060p to 1005p and stays with its hold recommendation.Genus: Numis initiates with a target price of 1290p and an add rating.Immunodiagnostic Systems: N+1 Singer reduces target price from 525p to 480p, while upgrading to hold.National Grid: Berenberg raises target price from 785p to 850p and retains a hold recommendation.office2office: WH Ireland places both its target price (prev.: 42p) and its buy recommendation under review.Renishaw: Investec increases target price from 1810p to 1900p maintaining a buy recommendation.Segro: Deutsche Bank moves target price from 260p to 270p, but still recommends selling.Stratex International: Northland lowers target price from 10.9p to 9.3p and maintains a buy recommendation.Tangent: Canaccord Genuity lowers target price from 12.7p to 11.6p and reiterates a buy recommendation.TT Electronics: Berenberg cuts target price from 247p to 220p keeping a buy recommendation.Wood Group: Numis raises target price from 838p to 919p reiterating an add rating.