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Seamax Aircraft

Seamax Aircraft is a Brazilian manufacturer of amphibious light-sport aircraft.

Last updated August 31, 2026

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Overview

Seamax Aircraft is a Brazilian aircraft manufacturer focused on amphibious light-sport aircraft. The company was established in 1997 by designer and engineer Miguel Rosário to develop and produce aircraft capable of operating from both land and water. It began in the metropolitan area of Rio de Janeiro before becoming associated with São João da Boa Vista in the state of São Paulo. The company's principal aircraft is the Seamax M-22, an amphibious light-sport aircraft derived from an earlier proof-of-concept design. The prototype first flew in 2000, and series production began in 2001. The M-22 is the central product associated with the Seamax name and represents the company's emphasis on compact, versatile aircraft for recreational, private, and utility-oriented aviation applications. Its amphibious configuration is intended to allow operations from conventional runways as well as suitable bodies of water, subject to applicable aviation and operational requirements. Seamax expanded its manufacturing footprint internationally in October 2020 by opening a factory in the United States. The American facility was described as a dedicated location for building the Seamax M-22, complementing the company's Brazilian operations and giving the brand a production presence in the United States. Publicly available reference material identifies the M-22 as the company's principal, and currently documented, aircraft program; further product lines, ownership structure, executive leadership, financial performance, and sales markets are not established in the supplied sources. The brand's positioning is therefore centered on specialized amphibious aviation rather than a broad commercial-aircraft portfolio. Seamax Aircraft is best characterized as a focused aerospace original-equipment manufacturer serving the light-sport and recreational aircraft segment. Its history is defined by the long-running development and production of the M-22, the transition from prototype to production in the early 2000s, and the later establishment of a United States manufacturing site.

History

Seamax Aircraft was founded in 1997 by Brazilian designer and engineer Miguel Rosário. The company was created with the purpose of developing amphibious aircraft, placing it in the niche segment of small aircraft designed for operation from both land and water. Its early activities were located in the metropolitan area of Rio de Janeiro. The company's development work led to a proof-of-concept aircraft that made its first flight in 2000. This prototype provided the basis for the Seamax M-22, the aircraft that became the company's principal production model. In 2001, Seamax began production of the M-22, marking the transition from experimental development to an established manufacturing program. The M-22 is categorized as an amphibious light-sport aircraft. Its design reflects Seamax's focus on compact aircraft with dual land-and-water operating capability. The model has remained the central aircraft associated with the company in the available historical record. No additional production aircraft or subsequent model family is identified in the supplied reference material. In October 2020, Seamax Aircraft opened a factory in the United States. The facility was described as the sole location building the Seamax M-22, giving the company a dedicated American manufacturing presence while its corporate base remained in São João da Boa Vista, São Paulo, Brazil. This step represented the most clearly documented geographic expansion in the company's history. Available sources provide limited information about Seamax's corporate ownership, management beyond its founder, production volumes, commercial performance, distribution network, regulatory certifications, or geographic sales footprint. They also do not document major acquisitions, public-market activity, controversies, product recalls, or large-scale marketing campaigns. Accordingly, the documented history of Seamax Aircraft is primarily a product-development and manufacturing history centered on the M-22 and the establishment of its United States factory.

  • 2020

    United States factory opens

    [1]

    In October, the company opened a United States factory dedicated to building the Seamax M-22.

  • 2001

    M-22 production begins

    [1]

    Seamax Aircraft started production of the Seamax M-22.

  • 2000

    M-22 proof-of-concept aircraft flies

    [1]

    The prototype that formed the basis for the Seamax M-22 completed its first flight.

  • 1997

    Company founded

    [1]

    Miguel Rosário founded Seamax Aircraft to develop and manufacture amphibious aircraft.

Products and positioning

A specialized aerospace manufacturer focused on amphibious light-sport aircraft, with the Seamax M-22 as its principal documented product.

  • Amphibious light-sport aircraft · 2001

    Seamax M-22

    The Seamax M-22 is Seamax Aircraft's principal documented production aircraft. It is an amphibious light-sport aircraft designed around the company's objective of providing a small aircraft capable of operating from land and water. The model developed from a proof-of-concept prototype that first flew in 2000, with production beginning in 2001. In October 2020, Seamax opened a United States factory described as being dedicated to construction of the M-22. The available sources do not establish detailed specifications, production totals, pricing, or a complete list of markets.

Brand decisions

  • 2020

    Establishment of a United States manufacturing facilityStrategy

    Background

    Seamax had developed and produced the M-22 in Brazil and later established an additional manufacturing presence in the United States.

    Action taken

    The company opened a factory in the United States in October 2020, with the facility described as the sole location building the Seamax M-22.

    Aftermath

    The move gave Seamax a United States production site. The supplied sources do not provide further information about capacity, employment, investment, or subsequent operating results.

Sources1 sources

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