Since the GDPR came into force on May 25th 2018, the Irish Data Protection Commission has fined:

1 company*

Live fine count also available in JSON format

* Fines have been issued to state agencies - however only one private company has received a fine under GDPR to date.

Reading Material

Document obtained under FOI listing the 180+ events at which "DPC staff spoke or presented" in 2019 [PDF]