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Records prior to registration year 2005 are not available online. Contact the Lobbyist Division here for assistance.	Search data is collected from registration records and disclosure reports submitted by lobbyists, lobbying entities, and their clients. Massachusetts General Law requires any party providing or retaining lobbying services to register annually, and submit disclosure reports twice a year.
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Disclosure reporting details

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Lobbyist disclosure reporting period: 01/01/2025 - 06/30/2025

Lobbyist name	Sara Castegini
Business name	Commonwealth Fusion Systems, LLC
Address	148 Sidney Street
City, state, zip code	Cambridge, MA 02139
Country	US
Agent type	Both
Phone	781-583-3100

Operating Expenses

No operating expenses were filed for this disclosure reporting period.

Activities, Bill Numbers and Titles

Client: Commonwealth Fusion Systems, LLC

Total amount paid by client; lobbyist is unable to report compensation at activity level: $20,000.00

House / Senate	Bill Number or Agency Name	Bill title or activity	Agent position	Amount	Direct business association
Executive	Executive Office of Energy and Environmental Affairs (EEA)	Discussions with the Executive Office Energy and Environmental Affairs regarding Commonwealth Fusion's operations in Massachusetts	Neutral	$0.00	N/A
Executive	Department of Environmental Protection (DEP)	Discussions with the Department of Environmental Protection regarding air quality permitting and regulatory requirements for projects in the Commonwealth	Neutral	$0.00	N/A
Executive	Executive Office of Housing and Economic Development (EOHED)(Executive Office of Health and Human Services)	Discussions with the Executive Office of Economic Development regarding Commonwealth Fusion's operations in Massachusetts	Neutral	$0.00	N/A
Executive	Other	Discussions with the legislature regarding Commonwealth Fusion's operations in Massachusetts	Neutral	$0.00	N/A
Executive	Office of the Governor	Discussions with the Lieutenant Governor regarding Commonwealth Fusion's operations in Massachusetts	Neutral	$0.00	N/A
			Total amount	$0.00

Meals, Travel, and Entertainment Expenses

No meals, travel, or entertainment expenses were filed for this disclosure reporting period.

Additional Expenses

No additional expenses were filed for this disclosure reporting period.

Campaign Contributions

No campaign contributions were filed for this disclosure reporting period.