Nowadays a German classical music company.
The company and record factory Deutsche Grammophon GmbH, Deutsche Grammophon Gesellschaft mbH, Deutsche Grammophon Ges. mbH or Deutsche Grammophon-Aktiengesellschaft or Deutsche Grammophon A.G. appears as company

Deutsche Grammophon GmbH was originally founded on 6th December 1898 by the brothers Joseph, Jacob and inventor The Gramophone And Typewriter Ltd., the successor to The Gramophone Co. Ltd. (which, in turn, was renamed The Gramophone Co. Ltd. in 1907).

During the First World War, the German government took control of DGG and the UK parent was shut out without compensation (this came after the war but DGG would never again be a subsidiary of The Gramophone Co. Ltd.)

From 1900 to 1937, the company generally traded as Polydor. The owner, Polyphonwerke AG, was merged with Deutsche Grammophon AG in 1932.

Second history of the Deutsche Grammophon GmbH:
1937: The AG was liquidated and renamed again into Deutsche Grammophon GmbH. The financial owners were Deutsche Bank and Telefunken Gesellschaft. This meant that Telefunken Platte GmbH, which had been founded in 1932, acquired the production plant they needed.
1941: Deutsche Grammophon GmbH was sold to the Siemens & Halske AG electronics company. Siemens Polydor for popular music.
1945: World War II totally ruined the factories and offices at Hanover. A small factory was relocated to Berlin, while the factory and headquarters in Hanover were being rebuilt.
1946: After decades of serving mainly as a record factory for the DG, the old leftover Deutsche Grammophon-label. No one was interested in buying anything that contained "Deutsche" in its name.
1949: For classical music DGG introduced for the first time a label under its own name, the EMI, effective 1 July 1951.
1954: The English subsidiary Polydor Records Ltd. was established in London.
1956: The istrative headquarter was relocated to Hamburg. French and Austrian subsidiaries Polydor S.A. Française and Polydor-Schallplatten-Gesellschaft mbH were established in Paris and Vienna respectively.
1958: The final label Deutsche Grammophon adopted the now-famous label design featuring a yellow cartouche bordered by a garland of tulips.
1959: Opening of the manufacturing plant "Werk II" in Langenhagen near Hanover.
1962: Siemens forms a t venture with Netherlands based Philips to create the DGG/PPI Record Group.
1969: US and Indian subsidiaries Polydor of India Ltd. were established in New York City and Bombay respectively.
1971: Phonogram International.
1987: Siemens sold most of their shares and Philips acquired a 90% ownership of the PolyGram; when the company went public, Philips' ownership was reduced to 75%.
1998: Seagram Company Ltd of Canada purchased PolyGram and merged it in January 1999 with Seagram-owned MCA Records.
2000: Seagram sold Universal Music Group to the French media company Vivendi.

Use Deutsche Grammophon GmbH (1938-present) where it appears as such, or a variation of that name (for instance Deutsche Grammophon Gesellschaft mbH.)
Use Deutsche Grammophon Hamburg where it appears as Deutsche Grammophon, Hamburg or Deutsche Grammophon Gesellschaft, Hamburg, or a variation.
Use Deutsche Grammophon where Deutsche Grammophon or Deutsche Grammophon Gesellschaft is used as label.
Use Deutsche Grammophon Gesellschaft where the Deutsche Grammophon or Deutsche Grammophon Gesellschaft trademark is used for a company credit.
Use Deutsche Grammophon-Aktiengesellschaft (1900-1937), where it appears as such, or a variation of that name (for instancel Deutsche Grammophon AG.)
Use Deutsche Grammophon G.M.B.H. Hannover where it appears as such.
Use Deutsche Grammophon G.m.b.H. Berlin where it appears as such (1945 - 1949).
For lacquer cut & pressing roles, there is Deutsche Grammophon Gesellschaft Pressing Plant (1946-1972), this name will not appear on any record, but can be derived from the runouts.