This site provides genome data and a UCSC Genome Browser track hub for the telomere-to-telomere (T2T) haplotype-resolved diploid assembly of the H9 (WAe009-A) human embryonic stem cell line. The hub includes gene annotations (CAT consensus genes, miRNAs, and tRNAs), multi-lab H9 RNA-Seq datasets, methylation and ATAC-seq tracks, Hi-C compartments, repeat and segmental duplication annotations, and whole-genome alignments to T2T-CHM13 and GRCh38. H9-specific genomic features are well-represented, including telomere annotations, CENP-B boxes, and variants linked to pluripotency and neurodevelopmental phenotypes.