ANSWER:

In order for any investment into the shares of a company, two conditions must be fulfilled:

1- The line of work is halal. 

2- The company doesn’t deal in Riba by financing its activities through riba or through deposits.

https://islamqa.info/en/answers/112445/ruling-on-buying-and-selling-shares

https://islamqa.info/en/answers/69941/the-difference-between-shares-and-stocks

Can we invest money in stock market in genuine company…

Islamic economy | October 14, 2020 11:04 pm
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Sheikh…can we invest in Wahed, an online shariah-compliant ethical investing platform backed by ….. ….. In this platform, we invest some money and the people working in Wahed invests our money in different halal stocks and gold ETFs. So, my question is it halal to invest in gold ETFs. Because the exchange is not happening on a hand to hand basis. Please briefly comment.
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Is it permissible to be involved in a tontine (system of saving money where there is one beneficiary every month that receives an amount of money contributed by tontine members and which ends when every member has got their turn) with colleagues, Knowing that they are non muslims?