SpeX spectra of TOI-4336 (TOI-4336 A, top row), TIC 166184426 (TOI-4336 B, middle row), and TIC 166184390 (TOI-4336 C, bottom row) from 2021 Jun. 27 (left column) and 2021 Jun. 28 (right column). The target spectrum (blue) is shown alongside the best-fit spectral template from the IRTF Spectral Library (gray). All spectra are normalized to their flux in the 0.9-1.4 μπι region. Wavelengths with strong telluric absorption are shaded (and largely masked from the spectra), and prominent M-dwarf absorption features are highlighted.