Strauss Borrelli PLLC, a leading data breach law firm, is investigating Mithun, Inc. regarding its recent data breach. The Mithun data breach involved sensitive personal information belonging to an undetermined number of individuals.
ABOUT MITHUN, INC.:
Mithun is an architecture and design firm based in Washington. Founded in 1949, Mithun develops and designs a range of architecture projects with expertise and services in architecture, interior design, landscape architecture, and urban design and planning.2,3,4 Projects completed by Mithun include public halls, student housing, residential towers, schools, offices, performing arts centers, museums, and more.5 Headquartered in Seattle, Washington, Mithun employs over 210 individuals and has additional locations in San Francisco and Los Angeles.3,6
WHAT HAPPENED?
Recently, Mithun reported to the Attorney General of the Commonwealth of Massachusetts that the sensitive personal identifiable information in its care may have been compromised. In the sample breach notice provided to the Attorney General of the Commonwealth of Massachusetts, Mithun does not elaborate on the nature of the security incident that impacted its systems. While the information impacted varies depending on the individual, the type of information potentially exposed includes:7
- Name
- Social Security number
- Driver’s license information
On October 15, 2025, Mithun began mailing data breach notification letters to impacted individuals. Based on the breach notice sent to Massachusetts residents, Mithun is providing affected individuals with a list of the specific types of sensitive information impacted and 24 months complimentary credit monitoring services. A link to the breach notification letters that Mithun filed with the Attorney General of the Commonwealth of Massachusetts is below.
If you received a breach notification letter from Mithun, Inc.:
We would like to speak with you about your rights and potential legal remedies in response to this data breach. Please fill out the form, below, or contact us at 872.263.1100 or sam@straussborrelli.com.
