Unlocking potential in Mid-America

We partner with early stage B2B Software, Enterprise IT and Healthcare IT companies.

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About Us

We provide Entrepreneurial Stage Capital to fast-growing, recurring revenue-model, software-enabled companies which address healthcare business needs or supply chain inefficiencies. We focus on opportunities throughout the Mid-America.

We are often the lead institutional investor in a Series A round with check size from $1.5-3.0 million, but we also participate with smaller investments in earlier rounds in order to partner with Series A prospects, as well as participate in follow-on rounds when we’ve previously invested in an A round.

We have significant experience with entrepreneurial stage companies and know where we can add value by challenging, but not second-guessing management.


>86 Repairs
>Deep Lense
>HealthPlan Data Solutions
>Healthy Roster
>Super Dispatch
>Vantage Point Logistics


Ben Trumbull

Ben joined Mark to help launch Tamarind Hill in 2017 and leads the firms Ann Arbor office. Ben serves on the Board for Tamarind Hill portfolio companies TrackAbout, 86 Repairs, and Handle (Observer).

Before Tamarind Hill, Ben managed the Rocket Venture Fund, a seed-stage venture capital fund targeting B2B software investments. Prior to being named fund manager, Ben served as an EIR and CFO for two portfolio companies, where he aided in fundraising rounds and organizational development for both companies.  Ben also provided venture assistance to Plymouth Venture Partners, where he conducted due diligence and managed investment pipeline.  Additionally, Ben held management roles for a family office in Toledo, where he oversaw venture capital and private equity investments and was a market researcher covering P&G (Oral Care & Pet Care) for the Nielsen Company.

Ben holds a BA in economics from Denison and an MBA from IU’s Kelley School of Business.  He lives in Ann Arbor, MI with his wife, Kate, and three children.

Mark Shary

Prior to co-founding Tamarind Hill, Mark has been a prolific founder, seed investor, advisor, board member and executive for more than a dozen technology start-ups.  He chairs the boards of two portfolio companies, Updox and Vantage Point Logistics, and serves on the board of two others, Deep Lens and HealthPlan Data Solutions. Mark also is an executive committee member of the board of Rev1 Ventures, a venture development organization with over $100 million under investment, and is a director at hc1.com, as well. 

Software companies that Mark founded or co-founded have raised over $80 million in private capital and have collectively grown to over $135 million revenue.  The first, HUBLink, merged with Healthcare.com and reached $70 million revenue prior to ultimately being acquired by Infor.  Additionally, Mark has been a NASDAQ CFO, an executive with Ernst & Young, an audit chair for a regulated investment company, and a co-founder of a 28 year running public charity.

Mark holds a BBA in accounting from the Mendoza School of Business at Notre Dame.  He lives in Columbus, OH with his wife Teresa and is the proud father of two adult sons.

Dr. Steve Allen

Dr. Steve Allen joined Tamarind Hill in March 2020 as an Executive in Residence helping with due diligence, portfolio company strategy and Healthcare industry connectivity.  In addition to his activity at Tamarind Hill, Steve is Executive Emeritus at Nationwide Children's Hospital and a Professor at Ohio State University.  Steve was the CEO of Nationwide Children’s for 13 years and oversaw its transformation to being a Top 10 Children's hospital and research institution with internationally recognized clinical programs and research efforts.  

Prior to his involvement at Nationwide Children’s, he served as a clinician, teacher, researcher and executive at The University of Texas -Houston Health Science Center and Memorial Hermann Health System in Houston for 24 years.

Dr. Allen received his undergraduate education from Rice University and an MBA from University of Houston-Clear Lake. He received his M.D. from University of Texas Medical Branch at Galveston​. Outside of his executive leadership, Dr. Allen is board certified in Anesthesiology and Critical Care Medicine, and is the author of nearly 150 medical journal articles, reviews and book chapters.

Steve is married to Dr. Jamie Keller Allen and has five children.  He splits time between Columbus and Park City where he enjoys skiing, golfing, biking and cooking. 

Mike Louge

Mike joined Tamarind Hill in January, 2021 as an Executive in Residence for due diligence, portfolio company strategy and healthcare industry connectivity. In addition to his work with Tamarind Hill, Mike is on the Board of Coverys, an international provider of medical professional liability insurance. Mike was the Executive Vice President and Chief Operating Officer of OhioHealth Corp. and prior to that Executive Vice President and Chief Financial Officer before retiring in November 2020. Mike also served ten years on the Board of the Ohio Hospital Association and most recently served as Chair of that Board in 2019.


Prior to his work with OhioHealth, Mike served in various senior executive roles in large integrated delivery systems in Austin and Dallas, Texas.


Mike graduated from Texas A&M University with a degree in Finance and Accounting. He is a CPA in Ohio and Texas. Mike lives in Columbus with his wife, Karen, and has 2 adult daughters and 1 adult son.

David Verbance

David joined Tamarind Hill in September 2020.  David contributes to Tamarind Hill by providing guidance to our entrepreneurs on strategy as well as personal coaching.  Additionally, David aids our Management Team with counsel on building the systems, governance, and team to manage Tamarind Hill.  He has a diverse background having helped grow and sell a transportation business contemporaneously with his early career in banking at Bank of America.   Recently David retired from Nationwide Investments as their Global Head of Alternative Investments where he spent two decades building portfolio management, third party management and alternative assets to $7 billion. During his career at Nationwide he also served at the CIO of the Property & Casualty division.  


David graduated from University of Alabama at Birmingham and received an MBA from DePaul University.


Stephanie Fortner

VP at Crane Investment Company

Matt Wilson

Managing Director - Head of Private Equity / Alternative Investments at Nationwide Insurance

Kurt Dalton

Managing Director at Mardal Investments

Chris Ostrander

Chairman/Partner at Cornerstone Consulting, Chairman/Partner at Kensington Hill Capital


206 E. Huron St.  |   Ann Arbor, MI 48104   |   (419)345-7688

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