Every new Connecticut business filing, every daySironax
SHEFALI AGARWAL, Principal
Sironax USA, Inc. is a biotechnology company targeting neurodegenerative, inflammatory, and metabolic diseases, as described on its website. The company is led by Shefali Agarwal, who is listed as the principal on the LLC filing and appears on the site's leadership page. Its principal address is in New Haven, CT, with a corporate office at 86 Jianguo Road, Waltham, MA, as shown on the site's contact page. The company has announced key leadership appointments and a partnership with Novartis for its brain delivery platform, per press releases.
Filed July 25, 2025 · New Haven, CT · New Haven County
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Connecticut Secretary of the State (business.ct.gov) · Entity 3262467 · Retrieved July 26, 2026
About Sironax
Sironax USA, Inc. filed in Connecticut on July 25, 2025, as a biotechnology company focused on therapeutic drug development, based in New Haven. The principal is Shefali Agarwal. The company's domain was registered on June 5, 2017, over eight years before the filing, using Squarespace Domains II, and the website is modern, built with WP Rocket, and confirms the company's identity. We estimate annual revenue between $10 million and $50 million with over 100 employees. No annual report or EIN on file yet.
- Domain registered 2,972 days before the filing, suggesting an established entity.
- Website is modern, built with WP Rocket, with confirmed identity.
- Hybrid footprint indicates both physical and online operations.
- No annual report or EIN on file yet.
- High revenue and employee estimates suggest a larger operation.
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 144 new businesses registered in New Haven in July 2025, and the only biotechnology 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 Sironax registered?
Sironax was registered as Corp on July 25, 2025 in Connecticut.
Where is Sironax located?
Sironax is based in New Haven, CT, 06519-2850, in New Haven County.
What type of business is Sironax?
Sironax is classified as a biotechnology business (therapeutic drug development).
Does Sironax have an EIN on file?
No EIN was found on file for Sironax at the time of registration.
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