Northwestern Mutual has chosen Horizon Next, the direct marketing arm spun off from Horizon Media as a stand-alone entity last year, as its agency of record following a review. Horizon Media declined to comment. Northwestern Mutual, a Milwaukee-based financial security company, also declined to comment. A person close to the review said Publicis-owned Spark Foundry,… https://www.adweek.com/agencies/northwestern-mutual-sends-media-account-to-horizon-next/