How would you translate "investment banking firms" in spanish?

Question

We research and discover these companies based on years of experience working in the financial industry and through our contacts with reputable broker/dealer and investment banking firms.

Answer 1

Firmas de inversión bancaria.

Answer 2

Here is what Wikipedia says'

In English:

Investment Bank

En español:

Banca de Inversión

Think about saying:

"Las firmas de banca de inversión", o

"Las firmas de bancas de negocios".

A caution. Wikipedia indicates "Banca" a feminine word. My dictionary indicates "banco" a masculine word. I'm betting on "El banco" in preference to "La banca".

Don't go to print with this until a member whose mother tongue is Spanish comments on this reply.

Is anyone able to confirm or alter this suggestion??