Histogram of all spectroscopically confirmed redshifts, within the NIRISS field of view. Here, we plot only the ‘secure’ NIRISS redshifts, and redshifts from ALT where at least two lines were detected. Many galaxies are observed by multiple instruments, although they are only included once in this figure and assigned in the order: ‘ground’, NIRSpec, NIRCam-WFSS, and NIRISS. The blue region on this histogram thus corresponds to the distribution of new secure redshifts presented in this catalogue.