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D. Mark Durcan (often listed as Dermot Mark Durcan) is an individual corporate director and retired technology executive who serves on the Board of Directors of Cencora, Inc. (NYSE: COR), where he has been a director since 2015 and Lead Independent Director since 2023.[[1]](https://investor.cencora.com/news/news-details/2025/Cencora-Appoints-Mark-Durcan-as-Chairman-of-Its-Board-of-Directors/default.aspx)[[3]](https://investor.cencora.com/governance/board-of-directors/person-details/default.aspx?itemid=61741735-0491-4ed6-9fa3-cc2903bf60af)[[4]](https://app.boardroomalpha.com/profiles/companies/SDJFCP2S-CENCORA_INC) In 2025, Cencora announced that Durcan would become Chairman of its Board of Directors, effective October 1, 2025.[[1]](https://investor.cencora.com/news/news-details/2025/Cencora-Appoints-Mark-Durcan-as-Chairman-of-Its-Board-of-Directors/default.aspx) He has recently reported insider purchases of Cencora stock, including an open‑market buy of 4,000 shares on May 28, 2026, at $266.26 per share, increasing his direct holdings to 27,767 shares.[[5]](https://www.stocktitan.net/sec-filings/COR/form-4-cencora-inc-insider-trading-activity-51f95c51a609.html)[[6]](https://cbonds.com/news/3943637/) Earlier Form 4 filings also show multiple Cencora-related insider transactions in 2023–2024.[[7]](https://markets.businessinsider.com/stocks/insideractivitytrader/durcan-dermot-mark-404249?miRedirects=1)
Durcan is best known for his long career at Micron Technology, Inc., where he served as Chief Executive Officer and Director from February 2012 to May 2017, after previously holding senior roles including President and Chief Operating Officer, Chief Operating Officer, and Chief Technology Officer, as well as various other positions with Micron and its subsidiaries dating back to the mid‑1980s.[[1]](https://investor.cencora.com/news/news-details/2025/Cencora-Appoints-Mark-Durcan-as-Chairman-of-Its-Board-of-Directors/default.aspx)[[3]](https://investor.cencora.com/governance/board-of-directors/person-details/default.aspx?itemid=61741735-0491-4ed6-9fa3-cc2903bf60af) He has also built a significant portfolio of board roles in the technology and healthcare sectors, having served as a director of Advanced Micro Devices, Inc., Freescale Semiconductor, Inc., Micron Technology, Inc., MWI Veterinary Supply, Inc., St. Luke’s Health System of Idaho, and Veoneer, and currently serving on the boards of ASML Holding NV and Rice University’s Board of Trustees.[[1]](https://investor.cencora.com/news/news-details/2025/Cencora-Appoints-Mark-Durcan-as-Chairman-of-Its-Board-of-Directors/default.aspx)[[3]](https://investor.cencora.com/governance/board-of-directors/person-details/default.aspx?itemid=61741735-0491-4ed6-9fa3-cc2903bf60af)[[8]](https://investor.amerisourcebergen.com/governance/board-of-directors/default.aspx) Public filings and analyst aggregators estimate his net worth in the hundreds of millions of dollars, driven largely by long‑term holdings in Micron and Cencora.[[2]](https://www.gurufocus.com/insider/721/dermot-mark-durcan)
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