What we know about this broker
Confirmed 2026-06-16. Magnite is a large programmatic SSP (sell-side platform) registered as a data broker with CA AG, CA CPPA, Oregon, and Texas. The User Choice Portal at magnite.com/legal/user-choice-portal/ offers a toggle-based opt-out of sale/sharing for CA, VA, UT, CO, and CT residents. GPC (Global Privacy Control) signal is honored: users with GPC enabled in their browser are automatically opted out on Magnite client sites. Opt-out is cookie-based — must be repeated if cookies are cleared, browser is changed, or device changes. For access/deletion requests requiring identity linkage, Magnite requires the user's Digital Identifiers (cookie values 'khaos'/'ruid' from rubiconproject.com, 'tvid' from tremorhub.com, or 'fsk_retargeting' from freeskreen.com) and may request a screenshot of these identifiers. Authorized agents accepted conditionally: agent must provide signed written permission; subject may also need to independently verify identity. Privacy contact: [email protected]; phone: +1.888.812.3839. Additional Magnite legacy domains (rubiconproject.com, tremorhub.com, freeskreen.com) are operated under the same entity but covered by the same opt-out flow. Verify is broker_confirmed — ad-tech cookie-state, not a public search profile.
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