Realizing the promise of
dual-payload antibody-drug conjugates
to transform cancer patient outcomes
About Us
We are developing next-generation, dual-payload antibody-drug conjugates (ADCs) that feature differentiated payload and linker technologies.
This enables targeted delivery of drug combinations to tumor cells to maximize therapeutic benefit for cancer patients. Our lead program is a dual-payload HER2-targeted ADC.
Our Team

Zachary Hornby
Chief Executive Officer
Zachary (“Zach”) Hornby is Chief Executive Officer of Callio Therapeutics. He has served in executive and director roles for multiple public and private biotechnology companies, and was most recently CEO, President, and a Director at Boundless Bio (Nasdaq: BOLD), a next-generation precision oncology company that raised $350M in private and public capital and brought three novel, internally discovered molecules into clinical development, one achieving FTD status. Prior to Boundless Bio,

Piers Ingram, PhD
President, Co-Founder
Piers is the President and co-founder of Callio Therapeutics. Prior to co-founding the company, he co-founded Hummingbird Bioscience. Piers previously spent 15 years in the biopharmaceutical industry in R&D consulting, commercial strategy and academia. Between 2013 and 2015, Piers was Head of Strategic Planning, South East Asia at Sanofi (NASDAQ: SNY) and

Jerome Boyd-Kirkup, PhD
Chief Scientific Officer, Co-Founder
Jerome is Chief Scientific Officer and co-founder of Callio Therapeutics where he oversees research and early development. Prior to co-founding Callio, Jerome co-founded Hummingbird Bioscience. Jerome’s career has focused on tackling human disease by applying systems biology approaches. A molecular biologist by background with extensive experience in computational and wet lab biology,

Naomi Hunder, MD
Chief Medical Officer
Naomi is Chief Medical Officer at Callio Therapeutics and leads the clinical development of its pipeline. Naomi has almost 20 years of experience leading development programs from initial design to global regulatory approvals and commercialization. Previously, she was Chief Medical Officer at ProfoundBio prior to the company’s acquisition by Genmab in May 2024

Kiran Asarpota
Chief Operating Officer
Kiran Asarpota is Chief Operating Officer at Callio Therapeutics and leads all finance and operational matters of the company. With over 20 years of leadership experience across U.S. and international capital markets, biotech operations, and financial strategy, Kiran was most recently Chief Operating Officer of ASLAN Pharmaceuticals.

Kevin Hambly
Chief Business Officer
Kevin Hambly serves as Chief Business Officer of Callio Therapeutics where he oversees business development activities. Kevin has more than 20 years of experience in business development, corporate strategy, financing, and investor relations across a diverse range of private and public biotechnology companies. Most recently, he served as Chief Business Officer at ProfoundBio, a private clinical-stage ADC company, where he oversaw the Series B financing and subsequent $1.8B acquisition by Genmab in 2024. Prior to that,

Jeremy Sauer, PhD
Vice President, Head of Strategy
Jeremy is Vice President, Head of Strategy at Callio Therapeutics where he focuses on maximizing value of the company’s multi-payload ADC platform. He brings over a decade of cross-functional biopharma experience. Most recently, Jeremy held leadership roles at Seagen (acquired by Pfizer) spanning competitive intelligence, early-phase clinical development, business development, and R&D external innovation. Prior to Seagen,
Board of Directors

Adam Simpson
Board Chair
Adam Simpson is a Venture Partner at Frazier Life Sciences, where he is focused on company creation opportunities. Adam has broad emerging company and operational experience with a particular focus on team building, advancing novel technologies through clinical proof of concept and leading significant fundraising, partnering and acquisition transactions.

Dan Estes, PhD
Frazier Life Sciences
Daniel Estes, Ph.D. is a general partner on the Frazier Life Sciences team and has been involved with investing in and building many of Frazier’s biopharmaceutical portfolio companies over the past 13 years. Dan has been a co-founder and board member of Lengo Therapeutics (acquired by Blueprint Medicines), Arcutis, Sudo Bio, Inipharm and Radionetics Oncology. He has also led Frazier’s

Jolene Ooi, PhD
EDBI
In her role with the Healthcare investment team at EDBI, Jolene leads strategic investments into biotechnology and other healthcare companies developing cutting-edge next-generation therapeutic modalities and precision medicines, such as ElevateBio, Nuevocor, Nuvation Bio, Engine Bio, Hummingbird Bioscience, and MiRXES.

Ken Harrison, PhD
Novo Holdings
Ken Harrison is a Senior Partner with the Venture Investments team at Novo Holdings US and is based in San Francisco. Ken currently serves on the boards of several private and publicly traded biotech companies. Prior to joining Novo Holdings, Ken worked in strategic planning at Genentech, management consulting at L.E.K. Consulting and was a seed-stage investor with Mission Bay Capital,

Vincent Ossipow, PhD, CFA
Omega Funds
Vincent joined Omega Funds in 2014. Previously, Vincent worked with Sectoral Asset Management, a healthcare institutional investor, as a Partner for private investments, prior to it he worked at Pictet Bank as a research analyst for biotechnology equities and as a co-manager of the Pictet Biotech Fund. He was before a research fellow at the University of Geneva, studying neuroscience, and trained as a postdoctoral fellow

Thomas Lynch, MD
Fred Hutchinson Cancer Center
Dr. Thomas J. Lynch Jr. is a world-renowned scientist, highly respected oncologist, and successful NCI-designated comprehensive cancer center leader.
As the President and Director of Fred Hutchinson Cancer Center, and holder of the Raisbeck Endowed Chair, Dr. Lynch brings more than three decades of experience at highly regarded U.S. cancer centers.

Ksenija Pavletic
Jeito Capital
Ksenija Pavletic is General Partner and Chief Commercial Officer (“CCO”) at Jeito Capital with over 25 years’ experience in pharma & biotech. She is an expert in both investment strategies and healthcare companies scaleups with a successful track record in fund raising, M&A, company & teams build ups, commercial organization build ups, product launches, market access.

Piers Ingram, PhD
President, Co-Founder
Piers is the President and co-founder of Callio Therapeutics. Prior to co-founding the company, he co-founded Hummingbird Bioscience. Piers previously spent 15 years in the biopharmaceutical industry in R&D consulting, commercial strategy and academia. Between 2013 and 2015, Piers was Head of Strategic Planning, South East Asia at Sanofi (NASDAQ: SNY) and

Zachary Hornby
Chief Executive Officer
Zachary (“Zach”) Hornby is Chief Executive Officer of Callio Therapeutics. He has served in executive and director roles for multiple public and private biotechnology companies, and was most recently CEO, President, and a Director at Boundless Bio (Nasdaq: BOLD), a next-generation precision oncology company that raised $350M in private and public capital and brought three novel, internally discovered molecules into clinical development, one achieving FTD status. Prior to Boundless Bio,
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1201 3rd Ave Suite 2200
Seattle WA 98101
The Galen
61 Science Park Road, #06-15
Singapore 117525