Relatively little is known regarding post-intervention reading fluency outcomes for English learners (ELs) in comparison with non-EL peers, yet educators must be prepared to sustain growth for all students transitioning to less-intensive tiers of support. The purpose of this study was to investigate whether EL status moderated post-intervention maintenance effects among U.S. second- and third-grade students who transitioned back to Tier 1 instruction only due to successful performance during a Tier 2 reading fluency intervention. Piecewise multi-level models were estimated to address whether EL status uniquely predicted intervention growth patterns and the extent to which these patterns were maintained over a 12- to 13-week post-intervention period. Reading fluency scores were similar between EL and non-EL students prior to the start of and during the intervention, and all students' performance decreased slightly immediately after support ceased. Regardless of grade level or EL status, post-intervention fluency gains generally remained smaller than those observed during intervention meriting attention to individual- and systems-level instructional considerations for ensuring continued growth.