# Thomas Mac Mahon > Thomas Mac Mahon is a Series C investor at Flare Capital Partners backing Health Care. See 2 investments, check sizes, portfolio. Updated Aug 2026. - Type: Angel Investor - Fund: [Flare Capital Partners](https://shizune.co/investors/profile/flare-capitalpartners) - Total investments: 2 - Last investment: Jul 2013 - Lead investor: 50% - Last updated: Aug 2026 Thomas Mac Mahon is a Series C investor at Flare Capital Partners focused on Health Care and Medical Device. Mr. Thomas P. Mac Mahon, Tom served as the Chairman of Laboratory Corp. of America Holdings from April 28, 1996 to May 2009 and its Chief Executive Officer and President from January 1997 to December 2006. Mr. Mac Mahon has experience in the areas of financial reporting, accounting and controls, mergers and acquisitions, corporate finance, costcontrol and restructuring, operations, public policy, law and compliance, government regulation, and information services. He has experience in a variety of business sectors including extensive healthcare experience. He has over ten years of experience as the Chief Executive Officer. Mr. Mac Mahon served as a Senior Vice President of Hoffmann-La Roche Inc. from 1993 to December 1996 and President of Roche Diagnostics Group. He served as the Chairman of PharMerica Corporation from July 31, 2007 to January 1, 2011. Since April 28, 1995, he served as the Vice Chairman at LabCorp from April 1995 to April 1996. Mr. Mac Mahon has been a Presiding Director of Aristotle Holding, Inc. and Express Scripts Holding Company since May 2008. He serves as a Director of SynapDx Corporation. He has been Director of Aushon BiosyStems, Inc. since February 26, 2013. Mr. Mac Mahon has been a Director of Aristotle Holding, Inc. and Express Scripts Holding Company since March 2001. He has been an Independent Director of PharMerica Corporation since July 31, 2007. He served as a Director of Laboratory Corp. of America Holdings from April 1996 to May 8, 2013. He served as a Member of Scientific Advisory Board of Hatteras Venture Partners. He served as an Independent Director of Golden Pond Healthcare, Inc. from 2007 to 2009. He served as a Director of the Executive Committee of Hoffmann-La Roche from 1988 to December 1996. He serves or served on the boards of public and private companies. He holds a B.S. in Marketing from St. Peter’s College and an MBA in Marketing from Fairleigh Dickinson University. ## Investment focus ### Industry | Industry | Investments | Share | | --- | --- | --- | | Health Care | 1 | 50% | | Medical Device | 1 | 50% | | Health Diagnostics | 1 | 50% | ### Stage | Stage | Investments | Share | | --- | --- | --- | | Series C | 1 | 50% | | Funding Round | 1 | 50% | ## Investments | Company | Description | Amount | Stage | Date | Website | | --- | --- | --- | --- | --- | --- | | SynapDx | SynapDx's mission is to provide laboratory testing services to physicians who evaluate children for developmental disorders with the initial goal of enabling earlier detection of autism. Autism Spectrum Disorders are currently estimated to affect 1 in 110 children in the United States according to the Centers for Disease Control.SynapDxwas founded by Stanley Lapidus and closed a Series A round of venture funding in May 2010 from North Bridge Venture Partners, Bain Capital Ventures, and General Catalyst Partners. SynapDx's corporate headquarters is located in Lexington, Massachusetts. | $15.4M | | Jul 22, 2013 | | | SynapDx | SynapDx's mission is to provide laboratory testing services to physicians who evaluate children for developmental disorders with the initial goal of enabling earlier detection of autism. Autism Spectrum Disorders are currently estimated to affect 1 in 110 children in the United States according to the Centers for Disease Control.SynapDxwas founded by Stanley Lapidus and closed a Series A round of venture funding in May 2010 from North Bridge Venture Partners, Bain Capital Ventures, and General Catalyst Partners. SynapDx's corporate headquarters is located in Lexington, Massachusetts. | $2M | Series C | | | 2 of 2 investments shown. ## Co-investors - [The Kraft Group](https://shizune.co/investors/profile/kraft-group) — VC Fund, 1 deal together ## About Flare Capital Partners VC Fund · Boston, United States Flare Capital Partners provides capital for early-stage and emerging healthcare technology companies. The firm invests across the United States, recognizing that healthcare technology innovation is occurring in many cities around the country. 5 contacts available at Flare Capital Partners. | Name | Title | Profile | | --- | --- | --- | | Thomas Mac Mahon | Executive Partner | https://shizune.co/investors/profile/thomas-mac-mahon | | Adam Bruce | Chief Financial Officer and Partner | https://shizune.co/investors/profile/adam-bruce-3 | | Bill Geary | Executive Partner Advisor | https://shizune.co/investors/profile/bill-geary | | Carter Prince | Flare Scholar | https://shizune.co/investors/profile/carter-prince | | Chris Kryder | Executive Partner | https://shizune.co/investors/profile/chris-kryder | ## Similar investors ### Similar stage - [Sequoia Capital](https://shizune.co/investors/profile/sequoia-capital) — VC Fund - [New Enterprise Associates](https://shizune.co/investors/profile/new-enterprise-associates) — VC Fund - [Bessemer Venture Partners](https://shizune.co/investors/profile/bessemer-venture-partners) — VC Fund ## FAQ ### What does Thomas Mac Mahon invest in? Thomas Mac Mahon invests primarily in Health Care, Medical Device and Health Diagnostics startups, most often at Series C and Funding Round stage. Most of the 2 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio. ### When did Thomas Mac Mahon last invest? The most recent investment recorded for Thomas Mac Mahon closed in Jul 2013. Shizune tracks 2 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly. ### Is Shizune's investor data accurate? Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page. # About Shizune Shizune.co is an investor database. 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