With Experian Business, they are weighed pretty heavily based on a 9 month time line, with zero being excellent, and anything over 4 applications or inquiries being considered on the excessive side and in turn has a significant impact on your business score. There seems to be no difference or further threshold than 4+. Although you could be still rated in the moderate to low risk category with this amount of inquiries, you could possibly see a swing of up to 60 points or so, and on a scale of 0 to 100 with all other scoring metrics within good parameters, that's pretty significant. I can't answer as to how D&B or Equifax treats these, or what their scale or time line is.
