I fear it's even a bit more complicated than I thought.
Here's Utrecht: https://en.numista.com/catalogue/mint.php?id=23
Dates of operation 1010-2020
BUT mintmaster entries include:
Stephan Satijn, Mint Master, Utrecht (2017-2021)
Bert van Ravenswaaij, Mint Master, Utrecht (2022-date)
Here's Royal Dutch Mint: https://en.numista.com/catalogue/mint.php?id=4668
Dates of operation 2020-date
BUT only one mintmaster entry attached:
J.W.A. van Hengel, Mint Master, Royal Dutch Mint (1945-1969)
Someone else will need to be the judge whether the 2020 split makes, from the wikipedia entry (https://en.wikipedia.org/wiki/Royal_Dutch_Mint) I don't see why any split makes sense and should be specifically 2020 rather than 2016 when it was sold or 1994 when it was renamed etc ….
Edit:
From the Royal Dutch Mint's website (https://royaldutchmint-corporate.com/about-us/#history):
The Royal Dutch Mint was founded in Utrecht in 1567, placing it among the oldest businesses in the Netherlands. During the 16th century, the Netherlands was home to a number of mints, each of which struck their own currency. In 1806, it was decided that the country should have one, central mint – the Utrecht Mint – and a single national currency.
After many years as a State-run institution, the Mint became an independent commercial organisation in 1994. The Dutch State remained involved as 100% shareholder. In 1999, the Mint was granted the right to bear the prestigious ‘Royal’ predicate. The King of the Netherlands reserves this predicate for a select group of Dutch businesses, as it symbolises the King’s respect, trust and appreciation for those organisations. In 2016, the Royal Dutch Mint became the first European mint to privatize its operations. This step enabled the Mint to improve its responsiveness, customer service and efficiency by means of a more effective decision-making structure and the ability to pursue long-term goals and strategies.