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We report the discovery and validation of four extrasolar planets hosted bythe nearby, bright, Sun-like (G3V) star HD~108236 using data from theTransiting Exoplanet Survey Satellite (TESS). We present transit photometry,reconnaissance and precise Doppler spectroscopy as well as high-resolutionimaging, to validate the planetary nature of the objects transiting HD~108236,also known as the TESS Object of Interest (TOI) 1233. The innermost planet is apossibly-rocky super-Earth with a period of $3.79523_{-0.00044}^{+0.00047}$days and has a radius of $1.586\pm0.098$ $R_\oplus$. The outer planets aresub-Neptunes, with potential gaseous envelopes, having radii of$2.068_{-0.091}^{+0.10}$ $R_\oplus$, $2.72\pm0.11$ $R_\oplus$, and$3.12_{-0.12}^{+0.13}$ $R_\oplus$ and periods of$6.20370_{-0.00052}^{+0.00064}$ days, $14.17555_{-0.0011}^{+0.00099}$ days, and$19.5917_{-0.0020}^{+0.0022}$ days, respectively. With V and K$_{\rm s}$magnitudes of 9.2 and 7.6, respectively, the bright host star makes thetransiting planets favorable targets for mass measurements and, potentially,for atmospheric characterization via transmission spectroscopy. HD~108236 isthe brightest Sun-like star in the visual (V) band known to host four or moretransiting exoplanets. The discovered planets span a broad range of planetaryradii and equilibrium temperatures, and share a common history of insolationfrom a Sun-like star ($R_\star = 0.888 \pm 0.017$ R$_\odot$, $T_{\rm eff} =5730 \pm 50$ K), making HD 108236 an exciting, opportune cosmic laboratory fortesting models of planet formation and evolution.

TESS discovery of a super-Earth and three sub-Neptunes hosted by the bright, Sun-like star HD 108236