MAGNITE, INC.
In the published model solve dated 2026-Q2, anchored at $19.79, MAGNITE, INC. (MGNI) is priced for today's economics sustained for ~16.3 years. boothcheck publishes no house fair value, target price, or buy/sell rating; individual model outputs and user-controlled scenarios are analytical inputs, not Boothcheck targets. The narrative was composed June 27, 2026 from SEC EDGAR filings.
Magnite is the largest independent sell-side advertising platform, the technology that streaming services and publishers use to sell their ad inventory programmatically. The pivot to connected TV has worked: in Q1 2026, CTV crossed 50% of revenue for the first time, up from 43% a year earlier, with CTV contribution ex-TAC growing 30%. The company turned profitable. Q1 revenue rose 6% to $164.4 million, contribution ex-TAC rose 10%, and Magnite swung to net income of $4.4 million from a loss, wi
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286 institutional managers reported holding MGNI in 13F filings for the quarter ended 2026-03-31. Together they hold about 88% of the company; the top 10 hold 45%. 41 opened new positions that quarter. Held by Vanguard Group, BlackRock, Wellington Management, among others. On the short side, 13.4M shares were sold short as of the 2026-06-15 count, about 9% of shares outstanding (4.7 days of typical volume to cover).
Quarterly 13F filings arrive up to 45 days after quarter end, so the picture is never current (filed through 2026-05-29). Nothing here is investment advice.
MGNI's share count grew 13.9% over the past five years even with $97.01M spent on repurchases. It pays no dividend. Cash returned over the past three years: $75.34M in repurchases.
Share counts are split-adjusted; repurchase totals are gross of share issuance. Nothing here is investment advice.
No open-market insider buys on file at MGNI over the trailing three years. Absence is a fact about the company, not a signal. 16 officers and directors are on file.
Code P open-market purchases from SEC Form 4 filings, non-derivative, excluding scheduled 10b5-1 plans. Nothing here is investment advice.
MGNI's recent reports: the day-one move, then what the following quarter actually did.
| report | day one | next quarter |
|---|---|---|
| 2023-08-10 | -43.5% | -11.7% |
| 2023-11-09 | +1.7% | +24.0% |
| 2024-02-29 | +4.3% | -24.1% |
| 2024-05-09 | -2.0% | +52.1% |
Day-one is the close-to-close move around the filing. Nothing here is investment advice.
MGNI's latest 8-K filings: 2026-06-11 (items 5.07); 2026-05-06 (items 2.02, 9.01); 2026-04-20 (items 5.02, 7.01, 9.01); 2026-04-10 (items 5.02); 2026-02-25 (items 2.02, 9.01).
Item codes are the SEC's own classification of what each report discloses. Dates link to the filing on EDGAR. Nothing here is investment advice.
Model solve date: 2026-Q2
Narrative composed: June 27, 2026
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For informational and research purposes only. Not investment advice. Not a recommendation to buy, sell, or hold any security. boothcheck is not a registered investment adviser. Past performance does not guarantee future results.