Every new Florida business filing, every dayMonster Gainz
Miguel Marrone, Authorized Member
Monster Gainz LLC appears to operate a fitness gym in the Miami area, based on the LLC name and the matching website Gainz Fit Miami, which offers personal training and gym services in Hialeah, FL.
Filed February 8, 2023 · Miami, FL · Miami-Dade County
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Florida Division of Corporations (Sunbiz) · Entity L23000071859 · Retrieved May 5, 2026
About Monster Gainz
MONSTER GAINZ LLC was filed in Florida on February 8, 2023, as an active gym and fitness business based in Miami, Florida, in Miami-Dade County. The company is managed by Miguel Marrone, who filed personally as the registered agent. The domain was registered over six years before the filing, on January 12, 2017, through GoDaddy, and the website is modern. The company was reinstated on April 25, 2025, after a prior lapse. It has two other entities with the same owner name. No annual report or EIN on file yet. We estimate the business has a revenue range of $100K-$1M and an employee range of 6-25.
- Domain registered 2,218 days before filing, indicating a long-established online presence.
- Owner Miguel Marrone filed personally as the registered agent.
- Reinstated on April 25, 2025, after a period of inactivity.
- Two other entities share the same owner name.
- We estimate revenue of $100K-$1M and 6-25 employees.
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 24, 2026.
One of 677 new businesses registered in Miami in February 2023, one of 2 fitness 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.
Officers / Authorized Persons
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Frequently Asked Questions
When was Monster Gainz registered?
Monster Gainz was registered as FLAL on February 8, 2023 in Florida.
Where is Monster Gainz located?
Monster Gainz is based in Miami, FL, 33132, in Miami-Dade County.
What type of business is Monster Gainz?
Monster Gainz is classified as a fitness business (gym).
Is Monster Gainz still active?
According to the Florida Division of Corporations, Monster Gainz's current record status is "active".
Does Monster Gainz have an EIN on file?
No EIN was found on file for Monster Gainz at the time of registration.
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