NYSE & NASDAQ: Mkt Cap: $1 billion+
Try Google Finance Screener ; you will be able to filter for NASDAQ and NYSE exchanges.
You are right: if the combined value of all outstanding GOOG shares was $495B, and the combined value of all GOOGL shares was $495B, then yes, Alphabet would have a market cap of at least $990B (where I say at least only because I myself don't know that there aren't other issues that should be in the count as well). The respective values of the total outstanding GOOG and GOOGL shares are significantly less than that at present though. Using numbers I just grabbed for those tickers from Google Finance (of course), they currently stand thus: There's a case to be made that companies below a certain market cap have more potential than the higher ones.  Consider, Apple cannot grow 100 fold from its current value. At $700B or so in value, that would be a $70T goal, just about the value of all the combined wealth in the entire US. At some point, the laws of large numbers take over, and exponential growth starts to flatten out.  On the flip side, Apple may have as good or better chance to rise 10% over the next 6-12 months as a random small cap stock. "EDIT: It was System Disruption or Malfunctions August 24, 2015 2:12 PM EDT   Pursuant to Rule 11890(b) NASDAQ, on its own motion, in conjunction   with BATS, and FINRA has determined to cancel all trades in security   Blackrock Capital Investment. (Nasdaq: BKCC) at or below $5.86 that   were executed in NASDAQ between 09:38:00 and 09:46:00 ET. This   decision cannot be appealed. NASDAQ will be canceling trades on the   participants behalf. A person on Reddit claimed that he was the buyer. He used Robinhood, a $0 commission broker and start-up.  The canceled trades are reflected on CTA/UTP and the current charts will differ from the one posted below.  It is an undesired effect of the 5-minute Trading Halt.  It is not ""within 1 hour of opening, BKCC traded between $0.97 and $9.5"".  Those trades only occurred for a few seconds on two occasions.  One possible reason is that when the trading halt ended, there was a lot of Market Order to sell accumulated.  Refer to the following chart, where each candle represents a 10 second period. As you can see, the low prices did not ""sustain"" for hours.   And the published halts." I think Infochimps has what you are looking for: NYSE and NASDAQ. "You cannot determine this solely by the ticker length. However, there are some conventions that may help steer you there. Nasdaq has 2-4 base letters BATS has 4 base letters NYSE equity securities have 1-4 base letters. NYSE Mkt (formerly Amex) have 1-4 base letters. NYSE Arca has 4 base letters OTC has 4 base letters. Security types other than equities may have additional letters added, and each exchange (and data vendors) have different conventions for how this is handled. So if you see ""T"" for a US-listed security it would be only be either NASDAQ, NYSE or NYSE Mkt. If you see ""ANET"" then you cannot tell which exchange it is listed on.  (In this case, ANET Arista Networks is actually a NYSE stock). For some non-equity security types, such as hybrids, and debt instruments, some exchanges add ""P"" to the end for ""preferreds"" (Nasdaq and OTC) and NYSE/NYSE Mkt have a variety of methods (including not adding anything) to the ticker.  Examples include NYSE:TFG, NYSEMkt:IPB, Nasdaaq: AGNCP, Nasdaq:OXLCN.  It all becomes rather confusing given the changes in conventions over the years. Essentially, you require data that provides you with ticker, listing location and security type. The exchanges allocate security tickers in conjunction with the SEC so there are no overlaps.  eg. The same ticker cannot represent two different securities. However, tickers can be re-used.  For example, the ticker AB has been used by the following companies:" Securities change in prices. You can buy ten 10'000 share of a stock for $1 each one day on release and sell it for $40 each if you're lucky in the future for a gross profit of 40*10000 = 400'0000 Your 1099-B report for ADNT on the fractional shares of cash should answer this question for you.  The one I am looking at shows ADNT .8 shares were sold for $36.16 which would equal a sale price of $45.20 per share, and a cost basis of $37.27 for the .8 shares or $46.59 per share. You're only counting one year.   Let's say 30 years of data, minutewise, for 2,000 stocks, and 50 characters per data line. That's 1.5TB of data.  Since the market has grown, that's an overestimate - 30 years ago there weren't 2,000 stocks in the NYSE - but it still gives us ballpark of roughly 1 TB.  Not an easy download. "It's easy to own many of the larger UK stocks. Companies like British Petroleum, Glaxo, and Royal Dutch Shell, list what they call ADRs (American Depositary Receipts) on the U.S. stock exchanges. That is, they will deposit local shares with Bank of NY Mellon, JP Morgan Chase, or Citicorp (the three banks that do this type of business), and the banks will turn around and issue ADRs equivalent to the number of shares on deposit. This is not true with ""small cap"" companies. In those cases, a broker like Schwab may occasionally help you, usually not. But you might have difficulty trading U.S. small cap companies as well." I should have been clearer but my point was that the NYSE seems to be blaming third party vendors for reporting invalid test data but their own website reported the same data so it seems like there might be another issue.   Edit: Found the full comment. It seems that NASDAQ distributed the test data and other parties including the NYSE incorrectly displayed it. I can (barely) understand some third parties incorrectly reporting this data but it seems really bizarre that NYSE wouldn't know how to handle this. Listing on NYSE has more associated overhead costs than listing on NASDAQ.  In the case of young technology companies, this makes NASDAQ a more attractive option. Perhaps the most important factor is that NYSE requires that a company has an independent compensation committee and an independent nominating committee while NASDAQ requires only that executive compensation and nominating decisions are made by a majority of independent directors.  No self-respecting, would-be-instant-billionare tech entreprenuer is going to want some independent committee lording it over their pay packet.  Additionally, listing on NYSE requires a company have stated guidance for corporate governance while NASDAQ imposes no such requirement.  Similarly, NYSE requires a company have an internal audit team while NASDAQ imposes no such requirement.   Fees on NYSE are also a bit higher than NASDAQ, but the difference is not significant. A good rundown of the pros/cons: http://www.investopedia.com/ask/answers/062215/what-are-advantages-and-disadvantages-listing-nasdaq-versus-other-stock-exchanges.asp "You are comparing two things that are not comparable.  The ""market size"" would be the total annual revenue in one market, in this year.  The ""market caps"" of a company is the number of shares multiplied by the share price. This should be equal to the total profit that the company is going to make through its life time, taking into account that you would get interest on an investment, so future profits have to be counted less accordingly.  So if the ""market size"" is ten million dollars, and a company has four million revenue in that market with one million profit, and everyone thinks that company will continue making that profit for the next fifty years, then surely one million a year for the next 50 years is worth more than ten million.  That's if the market stands still. If the ""market size"" is ten million, and we expect that market size to double for the next three years, then the market size is still ten million, but a company having a 40% share of a market growing at that speed is going to be worth a lot more!" One share costs the 202 $. You need to invest 3000 $ total at a minimum, meaning you have to buy some 14.9 shares at minimum. You should not worry about the exact number of shares, they are just to keep track, and you can buy every decimal part of them too. For example, if you invest now 5000 $, you will get 24.7525 shares. Next year, if they are for example worth 220 $ per share, you have a value of 24.7525 * 220 = 5445.55 $ It depends on the offering company, but that (a certain fixed amount per paycheck) is a typical way to invest (and a good way - you implictly take advantage of prices changing a bit - you buy more shares when the price is down and less when it's up). Probably you can make it an automated deduction from your checking account, or you send it every week/month/whenever. Good plan! "I bought 1000 shares of Apple, when it was $5. And yet, while the purchase was smart, the sales were the dumbest of my life.  ""You can't go wrong taking a profit"" ""When a stock doubles sell half and let it ride"", etc.  It doubled, I sold half, a $5000 gain. Then it split, and kept going up. Long story short, I took gains of just under $50,000 as it rose, and had 100 shares left for the 7 to 1 split.  The 700 shares are worth $79,000. But, if I simply let it ride, 1000 shares split to 14,000. $1.4M. I suppose turning $5,000 into $130K is cause for celebration, but it will stay with me as the lost $1.3M opportunity.  Look at the chart and tell me the value of selling stocks at their 52 week high. Yet, if you chart stocks heading into the dotcom bubble, you'll see a history of $100 stocks crashing to single digits. But none of them sported a P/E of 12." 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