The Carnegie-Spitzer-IMACS Survey is a wide-field, near-IR selected spectrophotometric redshift survey targeting nearly 15 sq degs using Baade 6.5m telescope at Magellan. Because the target selection is performed using Spitzer IRAC imaging, the survey efficiently traces the stellar mass of average galaxies to z~1.5. Here I briefly discuss the survey selection, observations, highlighting some of the more interesting aspects of the data. In particular I discuss our particular methods of fitting synthetic templates of spectral energy distributions to the low-dispersion spectra and panchromatic photometry to derive redshifts, stellar masses, emission line luminosities, and coarse information on recent star-formation.
The first 43,347 galaxies in the first 5.3 sq degs of the SWIRE XMM-LSS field are done, and analysis proceeds in the SWIRE CDFS and ELAIS-S1 fields. Over the full range of 3.6 micron fluxes of our selection, we find typical redshift uncertainties of <1.5% in sigma_z/(1+z) in the XMM-LSS field, with comparisons to previously published spectroscopic redshifts indicating errors <1% below z=1.2. Early results on the direct measurements of the hierarchical growth of galaxy groups will be discussed, as will a new, preliminary anlysis of galaxy stellar mass functions in tandem with the star-formation main sequence. All important mysteries of the universe are expected to be resolved.