COMAP Season 2 95% upper limits (given P(k) > 0) on the z ~ 3 CO(1–0) power spectrum, with analogous limits from COPSS (Keating et al. 2016) and COMAP Season 1 (Chung et al. 2022). Some k-bins in COPSS and COMAP Season 2 data show marginal excesses, influencing analyses in this work; we thus show 1σ intervals for these bins unlike in Stutzer et al. (2024). We also show predictions based on Chung et al. (2022), Padmanabhan (2018), Pullen et al. (2013), Li et al. (2016), and Yang et al. (2022), plus a variation on the Li et al. (2016) model from Keating et al. (2020), and the Keating et al. (2020) re-analysis of COPSS constraining clustering (triangles) and shot-noise amplitudes (dashed line).