Every new Connecticut business filing, every dayFifty Under
David Eichinger, Principal
Fifty Under LLC, operating as Fifty Under, provides renewable heating solutions, as stated on their website's title and description. The business is based in Cos Cob, Connecticut, matching the filing's principal address.
Filed June 9, 2026 · Cos Cob, CT · Fairfield County
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Connecticut Secretary of the State (business.ct.gov) · Entity 3458927 · Retrieved July 26, 2026
About Fifty Under
Fifty Under LLC filed in Connecticut on June 9, 2026, as a renewable energy company focused on heating solutions. David Eichinger is the principal. The domain was registered 13 days after the filing, on June 22, 2026, using Squarespace Domains and built with Squarespace. The site matched the filing name and address. No annual report or EIN is on file yet. We estimate revenue between $1 million and $10 million and 1 to 5 employees.
- Filed on June 9, 2026, and first seen by DayOneLead 47 days later.
- Domain registered 13 days after the filing.
- Website built with Squarespace and identity-confirmed.
- Principal is David Eichinger.
- 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 6 new businesses registered in Cos Cob in June 2026, and the only renewable energy business registered there that month.
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Filing Details
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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.
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Frequently Asked Questions
When was Fifty Under registered?
Fifty Under was registered as LLC on June 9, 2026 in Connecticut.
Where is Fifty Under located?
Fifty Under is based in Cos Cob, CT, 06807, in Fairfield County.
What type of business is Fifty Under?
Fifty Under is classified as a renewable energy business (heating solutions).
Does Fifty Under have an EIN on file?
No EIN was found on file for Fifty Under at the time of registration.
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