The Hirsch shoe store was founded by Moritz Hirsch before World War I and was originally located in the family's own house at Hochstraße 50. When Moritz Hirsch died in 1927, his widow Meta Hirsch needed the support of their son Rudolf Hirsch to continue the business. He was only 20 years old at the time. He moved the business to a rented store at Hochstraße 130. Even during the Great Depression, the shoe business was still expanding and employed 30 people. Nevertheless, the company had to contend with sales losses.

Franz-August Heeder and his nephew Wilhelm Niemann had already founded a wallpaper and oilcloth factory in 1860. The business address was Bäkerpfad 1, today's Virchowstraße 130. In 1882, the Jewish merchant David Devries joined the company as a co-partner. The company was dissolved in 1888, but was re-established by Devries at the same location only one year later. Devries also retained the original company name "Heeder & Co"

In 1898, the company "Markus Meyer Kartonfabrik Krefeld" was entered in the local commercial register as a letterpress, paper and cardboard wholesaler by Markus Meyer. Over the years, it became the most important family business in its sector in the wide area of the city. In 1927, a large new building was erected for the company at today's Philadelphiastrasse 146-150. It also housed apartments for employees. The building still stands today. 

In August 1879, the Jewish textile merchant Leonhard Tietz opened a textile store in Stralsund that was just 25m² in size. From this, the large and prestigious department store chain "Leonhard Tietz AG" was to emerge in the coming decades. The largest department store group in Germany was also located in Krefeld on the corner of Friedrichstraße and St. Anton Straße from 1904. With 43 locations throughout Germany, the Jewish company employed around 15,000 people. 

Alexander Kamp came to the city shortly after the synagogue was built on the corner of Marktstraße and Petersstraße and set up his business on Petersstraße with his brother Adolf. They sold hides and casings for butcher shops. At the end of the 1870s, he and his business moved to the acquired and larger house on Petersstraße 51-53. Alexander Kamp retired in 1896.

In 1904, the silk and velvet wholesale business "Merländer, Strauß & Co" was founded by Richard Merländer, Hermann Heymann and Siegfried Strauß. At that time, the Heymanns family had lived in Krefeld for almost 300 years. 

Since the 1920s, the company had its business premises on the third floor in the so-called "Sinn-Haus" on Neusser Straße. The Sinn-Haus was the first department store in Krefeld and was designed by Otto Engler in 1906. 

Otto and Hermann Aschaffenburg, founded the company "Gebrüder Aschaffenburg" in 1897 and started their production mechanical looms. Their weaving mill was initially located in rented rooms of the non-Jewish dye works "Simons & Gier" on today's Künkelerstraße 37. Simons & Gier processed the woven goods made by their tenants directly further.

Abraham Gotthelf founded the company ""A. Gotthelf & Cie" in 1861. The "mixed chairware factory" was located at what is now Kapuzinerstrasse 1. The company name suggests that Gotthelf had a partner who is no longer known today. It was a manual operation and it is not certain that all the manual looms (weaving looms operated by hand, not by machine) were together in the factory building. Nevertheless, the business must have flourished very well, because Abraham Gotthelf was at the top of all tax-paying Jews in Gladbach in the years 1869-1873.

Adolf Abraham and his brother Julius worked towards the end of the 19th century in the Bonn branch of Leonhard Tietz's department store group, which was also Jewish. In 1901, the brothers left this branch and opened their own department store in rented premises at Hauptstraße 59 in Rheydt.

Jonas Benjamin Jonas founded together with his brother Abraham Jonas on 1.11.1869 the leather shop "A. & J.B. Jonas", which moved into its business premises at Lüpertzender Straße 71. In January 1878 Abraham Jonas left the joint enterprise, but the business name did not change. A short time later, a shank factory was added to the leather shop. Although the business continued into the 20th century, Jonas Benjamin Jonas retired from the business at an early age and devoted himself to honorary functions.