Abstract: The NSF’s Laser Interferometer Gravitational-wave Observatory (LIGO) made the historic first observation of gravitational-waves (GWs) from a binary black hole merger on September 14, 2015 — almost exactly 10 years prior to the day of this talk. Here, we celebrate the 10-year anniversary of LIGO’s first direct detection by sharing the newest gravitational-wave event catalogue, GWTC-4.0, from our international LIGO-Virgo-KAGRA (LVK) network of ground-based GW observatories. In GWTC-4.0, we present 128 new GW candidates, more than doubling the number of GW candidates in about 1/3 of the observing time. This enhanced detection rate results from instrumental upgrades which, in the past 10 years, have transformed GW astronomy from a historic first detection, to a regular few-days occurrence in today’s ongoing fourth astrophysical observing run of the LVK. In this talk, we will share some of our major instrumental upgrades and challenges in LIGO (especially with regards to quantum enhancement), and highlight some new events from the GWTC-4.0 catalogue, which includes high-fidelity waveform and population-level studies of stellar-mass black holes via their mergers across cosmic time.