Jeb Keiper — investor profile photo

Jeb Keiper

Biotech Board Director; Venture Partner, Third Rock Ventures

📍 Cambridge, Massachusetts, United States🔄 Updated November 2026💼 2 investments📅 8 years investing🗓 Last invested May 2019𝕏 @upgrade_to_unlock
VC🌍 United States
2
Total investments
2
Early stage
0
Mid stage
0
Late stage
8y
Years active

Portfolio

2 investments · sorted by recency
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Late stage
Board Member
May 2019
ROME Therapeutics is developing novel therapies for cancer and autoimmune diseases by harnessing the power of the repeatome – vast stretches of uncharted genetic material that have long been dismissed as “junk DNA.” With several drug targets identified and multiple discovery programs underway, ROME is moving rapidly to leverage this new frontier in biology. To lead this exploration, ROME has assembled a team of world-class leaders across fields including oncology, immunology, virology and machine learning. ROME was launched in April 2020 and was incubated at GV, in collaboration with ARCH Venture Partners and Partners Innovation Fund. ROME is based in Cambridge, Mass. For more information, please visit www.rometx.com.
Member of the Board
Aug 2018
Cardurion Pharmaceuticals is a next generation cardiovascular company focused on the discovery and development of novel therapeutics for the treatment of heart failure and other cardiovascular diseases. Led by an experienced team of CV experts and industry veterans, we are developing groundbreaking clinical programs in PDE9 and CaMKII inhibition. We take a strategic portfolio approach driven by in-house drug discovery and our office of strategy and have concluded foundational partnerships with key strategics and investors, including an up to $300 million dollar investment from Bain Capital to support current programs and pipeline growth. Cardurion Pharmaceuticals has facilities in Burlington, Massachusetts and Shonan, Japan. For more information, please visit the company’s website at http://www.cardurion.com.
Experience · 3 entries
All (3)
Investments (2)
Board (2)
2026
Venture Partner
Jan 2026
We discover, launch and build great companies based on bold ideas that meet at the intersection of science, strategy, business and medicine – where transformational science meets operational reality – providing the best opportunity to make a dramatic difference in patients’ lives. THE THIRD ROCK TEAM Our team has a proven record of translating disruptive technologies into valuable business enterprises. Working closely with leading scientific and business visionaries as well as industry partners, we identify opportunities to change the future of medicine and rigorously vet those ideas through our discovery process to develop the vision, strategy and plan needed to succeed. A FORMULA FOR INNOVATION We only invest in the best of those ideas. We are actively involved in the early stages of our companies’ development, typically serving as members of the founding management teams, to build a strong foundation, put in place the right people and culture, and set the companies on a path to scientific and operational excellence. We believe in the companies we launch and make big initial investments, often complemented by strategic alliances, to enable our companies to advance life-changing therapies, devices and diagnostics. By creating value for patients, we create value for our investors.
2019
Board Member
May 2019
ROME Therapeutics is developing novel therapies for cancer and autoimmune diseases by harnessing the power of the repeatome – vast stretches of uncharted genetic material that have long been dismissed as “junk DNA.” With several drug targets identified and multiple discovery programs underway, ROME is moving rapidly to leverage this new frontier in biology. To lead this exploration, ROME has assembled a team of world-class leaders across fields including oncology, immunology, virology and machine learning. ROME was launched in April 2020 and was incubated at GV, in collaboration with ARCH Venture Partners and Partners Innovation Fund. ROME is based in Cambridge, Mass. For more information, please visit www.rometx.com.
2018
Member of the Board
Aug 2018
Cardurion Pharmaceuticals is a next generation cardiovascular company focused on the discovery and development of novel therapeutics for the treatment of heart failure and other cardiovascular diseases. Led by an experienced team of CV experts and industry veterans, we are developing groundbreaking clinical programs in PDE9 and CaMKII inhibition. We take a strategic portfolio approach driven by in-house drug discovery and our office of strategy and have concluded foundational partnerships with key strategics and investors, including an up to $300 million dollar investment from Bain Capital to support current programs and pipeline growth. Cardurion Pharmaceuticals has facilities in Burlington, Massachusetts and Shonan, Japan. For more information, please visit the company’s website at http://www.cardurion.com.
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