Atomic clock performance beyond the geodetic limit

We present recent updates in the development of optical lattice clocks, with particular emphasis on systems using ultracold ytterbium. Over the last several years, the intersection of quantum control, optical coherence, and precision measurement has afforded substantial progress in the development of these clock systems. Measurements can now reach 10^-18 precision or better, at a level capable of beyond state-of-the-art geodesy through determination of the gravitational redshift. We will highlight a variety of Yb clock measurement campaigns that have recently been carried out, including optical frequency ratio measurements with other optical clocks. These measurements are analyzed in the context of beyond-Standard-Model physics, such as fundamental constant variation and dark matter searches. Finally, we will discuss prospects for continued improvements and future measurement applications.