  We briefly review some recent results from Chandra and XMM-Newton studies of
the highest redshift (z > 4) active galactic nuclei (AGNs). Specific topics
covered include radio-quiet quasars, radio-loud quasars, moderate-luminosity
AGNs in X-ray surveys, and future prospects. No significant changes in AGN
X-ray emission properties have yet been found at high redshift, indicating that
the small-scale X-ray emission regions of AGNs are insensitive to the dramatic
changes on larger scales that occur from z = 0-6. X-ray observations are also
constraining the environments of high-redshift AGNs, relevant emission
processes, and high-redshift AGN demography.
