o We understand what it takes to grow and scale health services companies, and have created billions of dollars in exit value.

With more than 100 years of collective experience, our partners bring extensive investing, management and operational expertise.

Our combined knowledge enables us to deliver superior returns to our investors, and empowers our companies to develop true value for shareholders, providers, payors and patients, and become leaders in the markets in which they operate.


Diane Daych

Managing Partner and Co-Founder
(203) 479-9582

Diane Daych is a managing partner and co-founder of Granite Growth.  She has more than 30 years of investing, advisory and operant experience, with more than 25 years of experience in the health services industry. Before founding Granite Growth, Diane led Apple Tree Partners’ healthcare services investing team.  From 2010 to 2012, she was a managing director and co-head, Private Equity, of the Marwood Group. Previously, she was a partner and principal at CCP Equity Partners. Diane’s current investments include CleanSlate Outpatient Addiction Medicine, Three Oaks Hospice, and QualDerm Partners.  She currently sits on the board of Directors of CleanSlate, QualDerm, Three Oaks Hospice, the National Venture Capital Association and is Vice Chair of The Healthcare Private Equity Association. Diane earned an MBA from the Tuck School at Dartmouth College and a BA in Economics from Lehigh University.


Mark Brooks

Managing Partner and Co-Founder
(650) 624-7700

Mark Brooks is a managing partner and co-founder at Granite Growth. He previously co-founded MMC Health Services and Scale Venture Partners, a diversified venture firm with over $1.5 billion AUM, where he co-led the healthcare group for more than 15 years. He has more than 25 years of experience investing in, operating and managing high-growth health services companies, several of which have become market leaders. Mark currently sits on the Board of Directors of Alternative Behavior Strategies, CutisCare, Three Oaks Hospice and CleanSlate Outpatient Addiction Medicine. He is a board observer for QualDerm Partners. He has helped a number of companies successfully exit health services investments, including IPC The Hospitalist Company, Healogics, U.S. HealthWorks and New Century Hospice. Prior to joining Scale Venture Partners, Mark spent a number of years with Mercer Management Consulting, where he managed and executed projects for companies in the health services and telecommunications industries, and with Manufacturers Hanover Trust Company. Mark earned an MBA in Finance and Management from Wharton and a BA in Economics from Dartmouth College.


Paul Brown

Advisory Partner
(203) 479-9516

Paul Brown is an Advisory Partner at Granite Growth. He holds the James Lee Sorenson Presidential Chair and is a professor of entrepreneurship at the University of Utah’s David Eccles School of Business. He is also a senior director at the Sorenson Impact Center and an entrepreneur in residence at the University of Utah’s Center for Medical Innovation.

Prior to teaching, Paul was a managing director at Sandbox Industries in Chicago where he co-led the firm’s $300M healthcare venture capital fund. He also was the founder, president and CEO of Sandbox Innovation Partners, an innovation consulting practice. Prior to Sandbox, Paul was a vice president at the Blue Cross and Blue Shield Association for ten years, where he served on the CEO’s strategy council. Previous to that, he was a partner in the Chicago office of Kirkland & Ellis LLP.

Paul serves on the boards of CleanSlate Outpatient Addiction Medicine, QualDerm Partners, Central Logic, SwellCX, and amplify.io.

Paul earned a JD from the Northwestern University Pritzker School of Law and dual BAs from The University of Utah.


Mike Kaplan

Advisory Partner
(203) 479-9757

Mike Kaplan is an Advisory Partner at Granite Growth.  He is also the Managing Director of Altos Health, a venture capital firm he founded in 2009. Mike’s current boards include Alternative Behavior Strategies (autism treatment), Latitude Food Allergy Care (food allergy clinics), and Sterling Administration (HSA Administration).

Mike was previously a Partner at Three Arch Partners, a $1.1 billion fund focused on life sciences and healthcare services.  His notable investments included Free & Clear, Ascend Health, Habit Holdings, Novacept, Vascular Control Systems, and eValve.  Before joining Three Arch, Mike was an operating executive at Blue Shield of California, serving as Vice President of Corporate Development and Strategic Planning, Regional Chief Executive for Northern California, and Vice President of Business Transformation. Earlier in his career, Mike was a Senior Manager in consulting for APM/CSC Healthcare and a Financial Analyst at Kidder, Peabody & Co.

Mike earned an MBA from the Stanford Graduate School of Business and a BS in Business Administration from Washington University in St. Louis where he serves on the National Council.