At a P/E of 18.1 and a price-to-free-cash-flow of 59.5, Magnite (MGNI) trades above a two-stage DCF intrinsic value of about $3.88 per share, so at $19.00 the stock looks overvalued (79.6% above estimated intrinsic value). A high multiple is not the same as overvalued: fast-growing, high-quality businesses can deserve a premium. See the general approach in how to tell if a stock is overvalued.
On quality, Magnite scores 41/100 on Intrinsiqq's quality scorecard (a mixed business on these measures), weighing growth, margins, returns on capital, share count, and balance-sheet strength. All figures are computed from SEC filings; read the full methodology. This is analysis, not investment advice.