The Vermeulen family has been connected to organ building for centuries. The origins of the company date back to 1700 when Henricus Beerens in Nederweert built organs and organ cases. In 1730, this company built the organ in Bocholt. Henricus's daughter Maria Beerens married Petrus Vermeulen, who continued the business with Johannes Beerens. In the late 18th century, the company moved to Weert.

In 1850, Elisabeth Vermeulen married Matieu van Dinter, a member of an organ-building family in Tienen. A new workshop on Langstraat was opened. Matieu moved to Detroit in 1869. Lambert Vermeulen and his nephew Jan Vermeulen remained in Weert, expanding the business further. In 1871, they moved to Hoogstraat. In 1900, Joseph Vermeulen moved to Alkmaar and took over the L. Ypma organ company. The company became known as Gebr. Vermeulen, Weert, and Alkmaar. In 1930, the company celebrated its 200th anniversary. By then, they had already built around 250 organs.

In 1987, Joost Vermeulen merged the Alkmaar firm with Flentrop in Zaandam, and in 1998, due to a lack of succession, the Weert organ-building firm was also incorporated into Flentrop by Frans Vermeulen. This company is now a subsidiary of Flentrop.

https://repertorium.library.uu.nl/collectie/vermeulen/
https://nl.wikipedia.org/wiki/Vermeulen_(bedrijf)