Every new New York business filing, every dayMartin Koser
Martin Koser, Registered Agent
Martin Koser LLC operates as a psychotherapy practice in Brooklyn, NY, led by Martin Albert Koser, a licensed clinical social worker (LCSW-R). The practice appears to be a solo practitioner serving the Brooklyn area.
Filed July 27, 2026 · Brooklyn, NY · Kings County
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New York Department of State, Division of Corporations · Entity 7976395 · Retrieved July 29, 2026
About Martin Koser
Martin Koser LLC filed in New York on July 27, 2026, with a principal address in Brooklyn. Owner Martin Koser filed personally as the registered agent. The company's domain was registered 32 days before the filing, using Squarespace Domains and built on Squarespace. We first saw the listing two days after filing. The website matched the filing's name and address and is modern. One other entity shares the same address. No annual report or EIN is on file yet. We estimate revenue between $100K and $1M and 1 to 5 employees.
- Domain registered 32 days before the filing date.
- Owner filed personally as the registered agent.
- Website confirmed to match the filing's name and address.
- One other entity shares the same principal address.
- No annual report or EIN on file yet.
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 2,039 new businesses registered in Brooklyn in July 2026, one of 2 mental health services businesses.
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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.
Frequently Asked Questions
When was Martin Koser registered?
Martin Koser was registered as LLC on July 27, 2026 in New York.
Where is Martin Koser located?
Martin Koser is based in Brooklyn, NY, 11235, in Kings County.
What type of business is Martin Koser?
Martin Koser is classified as a mental health services business (psychotherapy).
Does Martin Koser have an EIN on file?
No EIN was found on file for Martin Koser at the time of registration.
Who Sells to This Business
Based on the business category, these service providers typically target this type of business.
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