Regex expression with (text)

Hello everyone,
I would like to extract a certain data set from a PDF (converted with Tika Parser) with Regex Extractor.
Text with Tika Parser
...Marketing (regional) ___Investitionen/Aufwand  13.750.875,14 € 6,0% ...
My Regex
(?:\(regional\)  ___Investitionen/Aufwand\s)(?<Invest>(?:(?!___).)*)
This does not work.
By doing this
(?: ___Investitionen/Aufwand\s)(?<Invest>(?:(?!___).)*)
It works, but I need the addition "(regional)".
What is the correct expression?
Many thanks!