I am holding an L1 visa and working in Microsoft. Can I move to Linkedin with the same visa? If yes, do I need to apply for new perm and I140?

I assume that you have not filed for an I-485 adjustment of status application. To move to LinkedIn, the company would have to sponsor you for another nonimmigrant status. That would likely be H-1B, and since that would be a cap H-1B, the petition would likely have to be filed in the first five business days of April for work to begin in October at the earliest if you are selected and approved.  If you have an I-140 approval, you would be able to keep the priority date,  but would have to file for a new PERM and I-140 for permanent residence. Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.