[vostok]

Neither of the two major publicly traded HFT firms would have made the top 10 if they were in the S&P 500.

http://d18rn0p25nwr6d.cloudfront.net/CIK-0001592386/f7d31d31...

https://www.flowtraders.com/system/files/downloads/Flow%20Tr...

I can imagine some smaller firms making the list. Did you have any specific ones in mind?

[dannyw]

The most successful ones won't be publicly traded.

[vostok]

Ok. Optiver was under $1 million per person so wouldn't make the top 10. IMC likely would not have been in the top 10 either.