With more than a decade of design work behind them, the instrumentation program of each of the three Extremely Large Telescope (ELT)-class telescopes is now ready to lock-in the set of capabilities it will be able to offer to their respective community at first light. The Giant Magellan Telescope, the Thirty Meter Telescope, and the European Southern Observatory’s ELT have each followed a formal instrumentation prioritization process with input from the astronomical community, which resulted in extensive and complementary suites of instruments that will be divided into two generations. We present this process as well as the general scientific characteristics of every instrument currently being developed for the three observatories. We also present how these instruments will fit the operation models of the observatories.