advertising technology founded los angeles 2009 2009 founder tom alexander headquarters los angeles united states website pk4media.com pk4 media is a technology company headquartered in los angeles that provides targeted display and video advertising . history edit pk4 media was founded in late 2009 by tom alexander . the company began as a display advertising network built through direct relationships with publishers . with the rise of video advertising pk4 media acquired technology company jsfour which brought in a proprietary ad supported video content infrastructure which became the basis for the bishop video platform . 1 in november 2013 the company announced the availability of xps a proprietary cross platform technology solution that deploys display and video creative across online mobile and tablet distribution platforms . 2 about a year later in november 2014 the company acquired prosperio a developer of direct platforms for display and video ads . 3 besides its headquarters in los angeles pk4 media maintains offices in detroit new york and san francisco . citation needed references edit moves could give online marketers more options biz report pk4 media takes on video ad optimization socaltech pk4 media acquires prosperio los angeles business journal external links edit company website facebook page twitter retrieved from https en.wikipedia.org w index.php title pk4 media & oldid 690404301 categories digital mediamedia companies of the united stateshidden categories all articles with unsourced statementsarticles with unsourced statements from may 2015 navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload filespecial pagespermanent linkpage informationwikidata itemcite this page print export create a bookdownload as pdfprintable version languages add links this page was last modified on 13 november 2015 at 03 42 . text is available under the creative commons attribution sharealike license ; additional terms may apply . by using this site you agree to the terms of use and privacy policy . wikipedia is a registered trademark of the wikimedia foundation inc. a non profit organization . privacy policy about wikipedia disclaimers contact wikipedia developers cookie statement mobile view