I like the cleaness of the design and the way you have used the shadow of the 'G'. Also the difference in the lettering between the 'Greenlight' and 'Capital Markets'.
The 'G' looks, however, a little 'lonely' out there on its own or it does not represent anything in particular beyond just the first letter. I would also like to try the 'Greenlight' in lower case and with a thinner font (as an alternative perhaps still in upper case but thinner font).
I look forward to any new ideas that you may have.