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Katherine O'Brien Creative Director GREY
Joanna O'Connell VP - Principal Analyst FORRESTER RESEARCH
Lara O'Reilly Media and Marketing Reporter THE WALL STREET JOURNAL
Kenny Ochoa Co-Founder QUIVER
Cathy Oh Head of Marketing and Analytics SAMSUNG ADS
Joseph Oh President & CEO FCB WEST
Sarah Ohle Vice President, Marketing Insights GROUNDTRUTH
Igee Okafor Digital Content Creator
Sara Okin Livengood Vice President of Product REFINERY29
Dale Older SVP, Product Managment INTEGRAL AD SCIENCE
Christi Olson Head of Evangelism, Bing MICROSOFT
Sam Olstein Director, Global Innovation GE
Micky Onvural CEO BONOBOS
Shachar Orren Chief Storytelling Officer PLAYBUZZ
Concha Orvañanos Founder YAKAMPOT
John Osborn CEO OMD
Kyle O’Brien Creative Works Editor THE DRUM
Sharon O’Sullivan Chief Revenue Officer OZY MEDIA