Katherine Sullivan, Principal
Katherine Sullivan LLC appears to be the professional entity for Katherine Sullivan, a licensed clinical social worker (LCSW) based in Westport, CT. The Healthgrades profile lists her practice address at 215 Main St, Westport, CT, and indicates she is accepting new patients. The filing's principal address is 181 Post Road West, Westport, CT, suggesting a possible office location or registered address.
Filed March 3, 2026 · Westport, CT
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Katherine Sullivan is a healthcare business (LLC) registered on March 3, 2026 with the Connecticut Division of Corporations. The business is located in Westport, Connecticut 06880. The filing lists Katherine Sullivan as Principal.
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We matched this business to its website and pulled the domain's registration (WHOIS) record. Domain age is one of the strongest signals that a filing is a truly new business and not a re-filing or paperwork change.
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Katherine Sullivan was registered as LLC on March 3, 2026 in Connecticut.
Katherine Sullivan is based in Westport, CT, 06880.
Katherine Sullivan is classified as a healthcare business (social work / mental health).
No EIN was found on file for Katherine Sullivan at the time of registration.
Based on the business category, these service providers typically target this type of business.
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