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A maker of software that automates the buying and selling of digital ad space, Magnite runs one of the world's largest marketplaces for connected TV advertising, with tools like SpringServe and ClearLine serving publishers and advertisers. Born from the 2020 merger of Rubicon Project and Telaria, it took its name from the mineral magnetite, a nod to the way its platform magnetically draws together buyers and sellers. Its roots trace to 2007, when Rubicon Project's founders set out to build an automated stock exchange for ad impressions.
Select a row to see that insider’s individual transactions. † Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 6 months: -381.8K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.