Shares held by directors

Ans to question no. 1)
There is no restrictions to hold minimum /maximum no. of shares to become ineligible/ eligible for directorship.

Answer to question no.2)
Abovementioned answer is applicable in listed companies also.

Answer to question no.3)
SEBI (Insider trading) regulation ,2015 does not prohibit to hold major shareholding, but it prohibits to disclose unpublished price sensitive information at public domain