This is from July of 2020 so I am sure its a little different now but it was 11.3%. Of note 6 tech companies (Apple, Microsoft, Amazon, Alphabet, Facebook and Tesla) made up almost 50% of the index.

https://www.cnbc.com/2020/07/22/these-six-tech-stocks-make-up-half-the-nasdaq-100s-value.html

[removed]