This proved to be a good investment, particularly with regard to De Courant, enabling Holdert between 1903 and 1923 to take over one newspaper after another, suspending publication as he went.

In 1926, Holdert began construction of a new printing facility at the Nieuwezijds Voorburgwal in Amsterdam, designed by J. F. Staal and G. J. Langhout.

The prohibition was lifted in 1949 and De Telegraaf flourished anew to become the biggest newspaper in the Netherlands.

At one point, in June 1966, the Telegraaf building was besieged by angry construction workers and Provo followers, after a false report that a victim of a labour dispute had been killed not by the police but by a co-worker.

On 26 June 2018, a delivery van intentionally rammed into the office building of De Telegraaf, catching fire afterwards which was probably started by the driver who made his getaway with another car.

[11] The newspaper contains many sensational and sports-related articles, and one or more pages supplied by the gossip-magazine Privé ("Private").