Carl Frederik Tietgen, Danish businessman and philanthropist, founded GN Store Nord (born 1829)

Carl Frederik Tietgen was a Danish financier and industrialist. He played an important role in the industrialisation of Denmark as the founder of numerous prominent Danish companies, many of which are still in operation today. Tietgen notably formed conglomerates, thus several of Tietgen's companies attained monopoly-like status, cementing their durability.

GN Store Nord A/S is a Danish manufacturer of hearing aids, speakerphones, videobars and headsets. GN Store Nord A/S is listed on NASDAQ OMX Copenhagen.