John Hennessey

Angel Investor and member of Boston Harbor Angels

📍 Weston, Massachusetts, United States🔄 Updated October 2026💼 5 investments📅 38 years investing🗓 Last invested Jan 2015𝕏 @upgrade_to_unlock
VC🌍 United States
5
Total investments
1
Early stage
0
Mid stage
1
Late stage
38y
Years active

Portfolio

2 investments · sorted by recency
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Late stage
Angel Investor and Advisor
Jan 2015
Boston Harbor Angels, Celebrating 20 Years of Angel Investing, like a lighthouse, helps entrepreneurs navigate and grow their start-up businesses through the treacherous waters of an increasingly competitive environment in our global economy. Boston Harbor Angels is a group of proven business leaders interested in investing a portion of our assets in high-growth, early-stage companies. Since 2004 we have made investments in companies in medical devices, IT, consumer products, business products, specialty materials, Internet, aviation, etc. We believe we contribute more than money to the companies we fund and welcome the opportunity to work with entrepreneurs who are open to taking advice, yet have the smarts and determination to make their company successful.
Angel Investor
2012
Siva Therapeutics’ mission is to develop cancer therapies that are: •Less Invasive •Safer •More Effective •Less Costly •Practical Currently, cancer patients face treatments that are invasive, risky, disfiguring, moderately effective at best, and very costly. Siva Therapeutics Inc is developing Targeted Hyperthermia™, a photothermal device cancer therapy which uses heat to irreversibly damage solid tumor tissue. The heat is delivered to tumors by infrared light that is absorbed by gold nanorods (‘SivaRods™’) and re-emitted as heat. The size, shape, and surface chemistry of the particles target the leaky vasculature of solid tumors, and the selective thermal sensitivity of tumor tissue enables the therapy to deliver clean margins. Siva therapy promises to be extremely safe, effective, and competitive in cost relative to surgery, chemotherapy, and radiation for cancer treatment.
early stageMedical Device
Experience · 6 entries
All (6)
Investments (5)
Board (2)
2015
Boston Harbor Angels
Angel Investor and Advisor
Jan 2015
Angel Investor and Advisor
Jan 2015
Boston Harbor Angels, Celebrating 20 Years of Angel Investing, like a lighthouse, helps entrepreneurs navigate and grow their start-up businesses through the treacherous waters of an increasingly competitive environment in our global economy. Boston Harbor Angels is a group of proven business leaders interested in investing a portion of our assets in high-growth, early-stage companies. Since 2004 we have made investments in companies in medical devices, IT, consumer products, business products, specialty materials, Internet, aviation, etc. We believe we contribute more than money to the companies we fund and welcome the opportunity to work with entrepreneurs who are open to taking advice, yet have the smarts and determination to make their company successful.
2012
Angel Investor
2012
Siva Therapeutics’ mission is to develop cancer therapies that are: •Less Invasive •Safer •More Effective •Less Costly •Practical Currently, cancer patients face treatments that are invasive, risky, disfiguring, moderately effective at best, and very costly. Siva Therapeutics Inc is developing Targeted Hyperthermia™, a photothermal device cancer therapy which uses heat to irreversibly damage solid tumor tissue. The heat is delivered to tumors by infrared light that is absorbed by gold nanorods (‘SivaRods™’) and re-emitted as heat. The size, shape, and surface chemistry of the particles target the leaky vasculature of solid tumors, and the selective thermal sensitivity of tumor tissue enables the therapy to deliver clean margins. Siva therapy promises to be extremely safe, effective, and competitive in cost relative to surgery, chemotherapy, and radiation for cancer treatment.
early stageMedical Device
2002
Brain Injury Association of Massachusetts
Board Member
2002
1989
STRATEGIC SYSTEMS CONSULTANT - Retail Marketing / Strategic Systems
1989
Fidelity’s mission is to strengthen the financial well-being of our customers and deliver better outcomes for the clients and businesses we serve. Fidelity’s strength comes from the scale of our diversified, market-leading financial services businesses that serve individuals, families, employers, wealth management firms, and institutions. With assets under administration of $15.0 trillion, including discretionary assets of $5.9 trillion as of March 31, 2025, we focus on meeting the unique needs of a broad and growing customer base. Privately held for 78 years, Fidelity employs more than 77,000 associates across the United States, Ireland, and India. For our Terms and Conditions, please visit http://go.fidelity.com/LIterms
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Investment activity
1988–2015 · 5 investments
19881200212012120152
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