Instead of (or in addition to) investing in a particular stock, I'd like to research ETFs that has holdings in a particular stock, and possibly invest in those instead. Is there a central place or places that has this information, aside from the individual ETFs website?
This even tells you what percentage of an ETF is a particular stock.
Be warned that this site is not entirely free. You will be limited to 6 pages in 6 hours unless you pay for a subscription.
Additionally ETFdb.com offers a similar tool.
An ETF does not track any one individual stock. It "is a marketable security that tracks an index, a commodity, bonds, or a basket of assets like an index fund." Check out this link to learn more about ETFs. The easiest way see what ETF tracks a stock is to determine what sector and industry that company is in and find some ETF that trade it. The ETF will likely trade that stock, assuming that its market cap and exchange it trades on fits within the parameters of the ETF.