Magnite, Inc.
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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.
| Holder | Schedule | % of class | Shares | Filed |
|---|---|---|---|---|
| Wellington Management Group LLP | 13G/APassive | 4.2% | 6.04M | Aug 13, 2026 |
| Wellington Group Holdings LLP | 13G/APassive | 4.2% | 6.04M | Aug 13, 2026 |
| Wellington Investment Advisors Holdings LLP | 13G/APassive | 4.2% | 6.04M | Aug 13, 2026 |
| FMR LLC | 13GPassive | 5.4% | 7.76M | Aug 6, 2026 |
| Abigail P. Johnson | 13GPassive | 5.4% | 7.76M | Aug 6, 2026 |
| Capital Research Global Investors | 13G/APassive | 3.5% | 5.02M | May 14, 2026 |
| Vanguard Capital Management | 13GPassive | 5.04% | 7.28M | Apr 30, 2026 |
| Vanguard Portfolio Management | 13GPassive | 5.43% | 7.85M | Apr 29, 2026 |
| The Vanguard Group | 13G/APassive | 0% | 0 | Mar 27, 2026 |