Every new Connecticut business filing, every dayKatherine B. Guerin, PhD
Katherine Guerin, Principal
Katherine B. Guerin, PhD, LLC is a psychology practice operated by Dr. Katherine B. Guerin, a licensed psychologist. The practice is located in Rye Brook, New York, as listed on her provider profile, and the LLC's principal address is in Greenwich, Connecticut. Dr. Guerin offers psychological services to patients in the area.
Filed August 11, 2025 · Greenwich, CT · Fairfield County
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Connecticut Secretary of the State (business.ct.gov) · Entity 3271213 · Retrieved July 26, 2026
About Katherine B. Guerin, PhD
Katherine B. Guerin PhD, LLC filed in Connecticut on August 11, 2025, with a principal address in Greenwich. Its domain was registered on December 30, 2003, over 21 years before filing, through NameCheap. The website matched the filing identity. We estimate revenue between $100,000 and $1 million with 1 to 5 employees. No annual report or EIN on file yet.
- Domain registered over 21 years before the filing date.
- Website identity confirmed matching the filing name and address.
- We estimate revenue $100K-$1M and 1 to 5 employees.
- No annual report or EIN on file yet.
- First seen by DayOneLead 349 days after filing.
Compiled from the state record, the company's public web presence, and our own research; revenue, employee, and footprint figures are estimates, not verified financials. Updated August 23, 2026.
One of 60 new businesses registered in Greenwich in August 2025, and the only healthcare business registered there that month.
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Filing Details
Verified Business Profile
Contact Information
Verified Website Profile
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.
Officers / Authorized Persons
Frequently Asked Questions
When was Katherine B. Guerin, PhD registered?
Katherine B. Guerin, PhD was registered as LLC on August 11, 2025 in Connecticut.
Where is Katherine B. Guerin, PhD located?
Katherine B. Guerin, PhD is based in Greenwich, CT, 06830-6956, in Fairfield County.
What type of business is Katherine B. Guerin, PhD?
Katherine B. Guerin, PhD is classified as a healthcare business (psychology).
Does Katherine B. Guerin, PhD have an EIN on file?
No EIN was found on file for Katherine B. Guerin, PhD at the time of registration.
Who Sells to This Business
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