Can you clarify what you're looking for? Rand/objectivism's intellectual impact hasn't been seen in philosophy but she has been influential on a number of policy makers. I'm not sure however if that sort of practical as opposed to academic answer is what you're looking for.

I like this answer from /r/askphilosophy

http://www.reddit.com/r/askphilosophy/comments/2tagku/should_i_study_rand/cnxp5co

Tl;dr Essentially she's had no impact on academic philosophy but (disclaimer to note that I'm not a supporter of Rand's views) sometimes here works/objectivism can be treated as straw men which is by nature problematic. She makes serious philosophical claims and i'm guessing anyone who says here attempts at philosophy are relegated to the fiction section is trafficking in an urban legend. That being said there are clear problems with her work that help explain why she's not treated as a major/important/sometimes even serious philosopher.

Rands Objectivism is very supportive of narcissistic individualism as as the optimal form of individual and social behavior. She had influence with right wing politicians for that reason. Most academics would consider her "philosophy" sophomoric. Rands role as a "philosopher" is probably similar to L. Ron Hubbards role as a "theologian." Not sure if ask history is where you want to be asking your question.

Rand's impact on the academic world has been trivial. This would be expected since her work is a scathing indictment of modern intellectuals. However, she has had a major impact on the culture; Atlas Shrugged and the Fountainhead are the second and third most influential books among the American public behind (unfortunately) the Bible, and I think it's safe to say she has more admirers than any living philosopher. So in summary: no impact on academia, big impact on non-academia.