With reference to your request for information I inform you on the following.
Since you were under the age of thirty when you obtained your residence permit as a highly skilled migrant, your wage criteria was that of an applicant under the age of thirty. You are allowed to have the same wage criteria even if you will over thirty years of age as long as you are still working for the same company. Currently that wage criteria is € 37.575 gross per year, including holiday benefits.