Justin B. Smith
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Justin B. Smith is Co-Founder and CEO of Semafor. According to Semafor, he was previously CEO of Bloomberg Media. Earlier in his career, he was President of Atlantic Media, where he co-founded Quartz, served as President of The Week magazine, and led corporate strategy at The Economist Group. He is known for co-founding Semafor and for his leadership roles across media organizations.
Updated 6 September 2026
Public sources: semafor.com
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