ACI Worldwide

ACI Worldwide powers electronic payments for more than 5,100 organizations around the world. More than 1,000 of the largest financial institutions and intermediaries, as well as thousands of leading merchants globally, rely on ACI to execute $14 trillion each day in payments and securities.

Clarion Partners

Clarion Partners is a leading U.S. real estate investment manager for almost 30 years, with a presence in major markets across the United States. The company owns and manages Waltham Woods including 880 and 890 Winter Street in Waltham.

Davis Marcus Partners

Davis Marcus Partners (“DMP”) is a venture between Marcus Partners and The Davis Companies. DMP affiliates own and operate a portfolio of real estate in excess of four million square feet, valued at more than 1.0 billion dollars. Locally DMP owns and operates Reservoir Woods Office Park in Waltham, a 1.3 million square foot office, biotechnology and medical campus.

Fresenius Medical Care

Fresenius Medical Care North America is a major provider of kidney dialysis services and renal care products, providing products, dialysis care services, education and support for Chronic Kidney Disease. It maintains its corporate headquarters in Waltham.


ImmunoGen, Inc., with its corporate headquarters in Waltham, develops targeted anticancer therapeutics using our expertise in cancer biology, engineered antibodies and highly potent cancer-cell killing agents.

King Street Partners

King Street is a private real estate investment management firm focused on serving the complex needs of science based companies and institutions. They have a proven track record of delivering superior risk-adjusted returns through its value-add and core-plus investments in the life science real estate sector. Whether for value-add or core-plus, King Street invests only in or near established life science nodes. The company is extremely active in the core science submarkets of Boston including Cambridge, Waltham and Lexington.

Mass Medical

The Massachusetts Medical Society, with its main office in Waltham, is the statewide professional association for physicians and medical students. They are dedicated to educating and advocating for the patients and physicians of Massachusetts.

The MMS publishes the New England Journal of Medicine, a leading global medical journal and web site, and Journal Watch alerts and newsletters covering 12 specialties.

National Grid

National Grid is an international electricity and gas company and one of the largest investor-owned energy companies in the world. Their core business is the delivery of electricity and natural gas. Northeast Operations, located in Waltham, maintains and operates a 9,000-mile transmission system serving five states. It provides transmission services for more than 310 generators, five electric distribution companies, 53 municipal electric companies and interconnect with a dozen other transmission providers.


PerkinElmer, with corporate headquarters in Waltham, designs, manufactures and delivers advanced technology solutions that address the world’s most critical health and safety concerns, including maternal and fetal health, clean water and air, and safe food and toys. The company’s expertise combines science innovation and a culture of operational excellence to offer customers technology services and support that improve the quality of people’s lives worldwide.

Thermo Fisher Scientific

Thermo Fisher Scientific is a global leader of nearly 40,000 employees. They have offices around the world, with their World Headquarters along along Route 128 in Waltham, MA.

Raytheon Company

Raytheon Company is a technology and innovation leader specializing in defense, civil government and cybersecurity solutions. Founded in 1922, Raytheon provides state-of-the-art electronics, mission systems integration, capabilities in C5I (command, control, communications, computing, cyber and intelligence), sensing, effects and mission support services. Raytheon relocated its corporate headquarters from Lexington, Massachusetts to Waltham, Massachusetts in 2003.

Amadeus North America

Amadeus is a leading provider of advanced technology solutions for the global travel industry. Customer groups include travel providers, sellers and buyers. Worldwide, the Amadeus group employs around 10,000 people, across central sites in Spain, France and Germany as well as 71 local Amadeus commercial organizations globally. In addition to Waltham, the company has North American office locations in Chicago, Dallas, Miami, Toronto, and Tucson. More information about Amadeus can be found at