Why Is MAGNITE INC (MGNI) Stock Up Today?

Magnite Inc (MGNI) shares surged 20.54% to close at $27.47, driven by strong third-quarter 2026 results and a significant raise in full-year guidance. The stock printed five fresh 52-week highs on November 5, 2026, as analysts upgraded their price targets following the earnings release.

What Happened

Magnite reported third-quarter 2026 financial results that highlighted a surge in connected TV advertising and a boom in political ad spending. The company raised its full-year 2026 contribution ex-TAC growth outlook to approximately 17% and increased its FY2026 contribution ex-TAC guidance from a range of $756.648M to $763.344M to a new figure of $783.400M. Management also signaled a 2027 adjusted EBITDA margin of at least 38.5%.

In response to the strong performance, several analysts raised their price targets. Susquehanna maintained its rating and lifted its target to $35 from $30. B. Riley raised its target to $32 from $30, while Lake Street increased its target to $29 from $25. Scotiabank also raised its price target, citing the strong earnings.

What The Data Shows

The stock opened at $24.88, a 9.2% gap up from the prior close of $22.79. The session high reached $28.17 at 9:45 AM ET, while the low was $24.88 at 7:05 AM ET. Volume stood at 1.7M shares, which is 0.7x the 3-month daily average. The company has a market cap of $3.2B, a P/E of 20.7, and a beta of 2.39. Revenue grew 8.3% on a trailing twelve-month basis, with a net margin of 22.5%. The 52-week range is $10.82 to $26.84.

Recent insider activity shows 21 sells totaling $16.5M over the last 90 days, with no buys recorded. The most recent insider sale occurred on October 14, 2026. Over the last eight sessions prior to the move, the stock had risen 5.4% from $21.62 to $22.79.

What To Watch

Investors will monitor the company's ability to sustain the raised 2026 contribution ex-TAC guidance and achieve the projected 2027 adjusted EBITDA margin of at least 38.5%. The breadth of analyst coverage, with 15 stories from 6 sources in the last 36 hours, suggests continued focus on the stock's valuation and growth trajectory.