• by Steve McClellan  @mp_mcclellan, July 1, 2015

Update: A correction to this story has been posted to note that three Lions in the accompanying chart are incorrectly attributed to Interpublic’s Initiative when sibling agency UM should have been credited with the awards. 

This year, there were 41,000 entries submitted by all agencies competing across all categories at the Cannes Lions Festival last week.

With 1,688 Lions awarded, the conversion rate from entry to winning a medal was less than 5%, according to an analysis by Omnicom Media Group. Less than 10% (4008 entries) made it to a shortlist. 

And 42% of shortlisted entries won Lions overall. 

Media agency holding companies and their agencies took home 342 of the 1,688 awarded medals, with a conversion rate (from shortlist to Lion) that aligned pretty closely to the overall Festival.   

The following conversion rates apply to shops that had five or more shortlisted entries. Among WPP media brands, the entity with the best conversion rate was GroupM at 60% (not an agency per se, but many of the submissions listed GroupM as the media entrant; by agency, Mindshare was tops at 49.5%).

The Omnicom media brand with the highest conversion rate was OMD (50%) while ZenithOptimedia was the top converter among Publicis Groupe media brands (47%). 

Dentsu Aegis Network had a conversion rate of 44.6% and Havas Media 29%. 

Among the holding company media shops, OMD won the most Grand Prix (3), followed by Mindshare (2) and Starcom MediaVest Group (1). 

The chart below, assembled by Omnicom Media Group, breaks out Lions won by holding company media agency entrants.