{"entity":{"id":"heidelberg-pharma","kind":"company","name":"Heidelberg Pharma","aka":["Heidelberg Pharma AG"],"tldr":"Heidelberg Pharma is a German company building antibody-drug conjugates around amanitin, a toxin from the death cap mushroom that kills cells by blocking RNA polymerase II, with its lead candidate HDP-101 in multiple myeloma.","summary":"Heidelberg Pharma, based in Ladenburg near Heidelberg and listed in Frankfurt, develops antibody-targeted amanitin conjugates (ATACs): the payload amanitin inhibits RNA polymerase II, a mechanism distinct from the microtubule and DNA-damaging payloads of most ADCs and active in slowly dividing cells. Its lead candidate HDP-101 targets BCMA in relapsed multiple myeloma, and the platform is licensed to partners including Takeda. It appears on OnCo as a lead sponsor of phase 3 cancer trials on ClinicalTrials.gov, from earlier programmes.","asOf":"2026-09-11","links":[{"label":"Official website","url":"https://heidelberg-pharma.com"},{"label":"ClinicalTrials.gov: trials led by Heidelberg Pharma","url":"https://clinicaltrials.gov/search?lead=Heidelberg%20Pharma"},{"label":"Wikipedia","url":"https://en.wikipedia.org/wiki/Heidelberg_Pharma"}],"tags":["ctgov-sponsor"],"related":[],"cancers":["multiple-myeloma"],"sections":["adcs"],"technologies":["adc"],"targets":["bcma"],"drugs":[],"companies":["takeda"],"institutions":[],"pathways":[],"terms":[],"trials":[],"people":[],"bottlenecks":[],"keyPapers":[],"journals":[],"notes":[],"provenance":{"editedBy":"OnCo ingestion (ClinicalTrials.gov v2 + sponsor websites)","editedOn":"2026-09-11"},"hq":"Ladenburg","country":"DE","companyType":"biotech","website":"https://heidelberg-pharma.com","stage":"public","investors":[],"funding":[]},"route":"/companies/heidelberg-pharma/","neighbours":{"cancer":[{"id":"multiple-myeloma","kind":"cancer","name":"Multiple myeloma","route":"/cancers/multiple-myeloma/"}],"section":[{"id":"adcs","kind":"section","name":"Antibody-Drug Conjugates","route":"/fronts/adcs/"}],"technology":[{"id":"adc","kind":"technology","name":"Antibody-drug conjugate (ADC)","route":"/technologies/adc/"}],"target":[{"id":"bcma","kind":"target","name":"BCMA","route":"/targets/bcma/"}],"company":[{"id":"takeda","kind":"company","name":"Takeda","route":"/companies/takeda/"}]}}