Why do different ETF tools show different information (specifically which stocks are in an ETF)?

Question

I'm looking for ETFs with a specific stock (in this case: SNDL) in it. But when I look at different sites that track ETFs, some sites say an ETF will have the stock and other sites don't list it at all.

1. Why are these sites reporting different info?

2. What should I look at to know what stocks are in an ETF?

Examples

• https://fknol.com/etf/exposure/sndl.php - Says MJ, POTX, and THCX have SNDL

• https://fintel.io/soe/us/sndl - Says MJ and POTX have SNDL

• https://www.etf.com/MJ - SNDL is not listed

• https://www.etf.com/POTX - SNDL is not listed

• https://www.etf.com/THCX - SNDL is not listed

Answer 1

Most ETFs are designed to follow an underlying benchmark like the S&P 500 Index of DJIA.

Actively managed ETFs take positions based on the strategy of the portfolio manager. If the ETFs in question are actively managed, the position may have been sold.

Other possibilities might be that:

• an ETF only lists its top holdings and not small positions

• an ETF has a lag in reporting additions and deletions

To determine if any of these apply, you're going to have to do some digging. I didn't.