How do you find out who the investors are in a U.S. stock? e.g. how ownership may be concentrated?
I don't think that you will be able to find a list of every owner for a given stock. There are probably very few people who would know this. One source would be whoever sends out the shareholder meeting mailers.  I suspect that the company itself would know this, the exchange to a lesser extent, and possibly the brokerage houses to a even lesser extent. Consider these resources: "Companies absolutely know who ALL their shareholders are. Ownership is filed on Form 3/4 and in 10-Q/Ks. Look there.  Guidelines for required disclosure are as follows: 1) Individuals must disclose when their ownership exceeds 5%; 2) Non-individual legal entities (read: companies; e.g. a hedge fund) must disclose when their ownership exceeds 10% (Form 13-F); and 3) All Officers and Directors Notice the word ""required."" For example, a entity (individual/company) may file ""confidentiality letter"" (which allows them to delay disclosing ownership) with the SEC as they are building a position.  So at any given point in time the information that is publicaly available may not be ""up-to-date."" And in all cases beneficial owner(ship)."
Let me first give you my definitions of the words 'investor' and 'speculator'. To me, anyone looking to 'buy low, sell high' is a speculator. Only 'buy and hold' people are investors.  The news agencies love to report on changes in the price of a stock. This gives them something to talk about. So speculation is encouraged by the news media. What investors care about is dividends. In my opinion whatwhat news agencies should report on are changes to the dividend provided by a security.  I used to be a speculator, but now that I am retired I am an investor. "A more serious problem: how do you know who's really buying your stock? ""Shell companies"" are an increasingly obvious problem in corporate and tax accountability. There are jurisdictions where companies can be created with secret lists of directors and shareholders. If stock is bought by one of these companies, it is very hard to trace it to a particular individual." A lot will depend on wether you have in your possession the physical share documents or just numbers in your brokerage portfolio. Electronic shares are not traceable as they do not exist as individual entities. ETrade certainly knows who bought how much, but no concept of which ones. Lets say ET buys 1000 shares of Acme, their database looks like this: Now they sell 400 shares to Bob: Bob sells 200, Alice buys 100: ( skipped one transaction for brevity ) Did Alice get 100 shares out of ET's original 1000, or did she get 100 shares that were previously owned by Bob? Or 27 from ET and 73 from ET? Another, less exact way to picture the process is one share is 1ml of liquid. If you return 50ml to the pot it becomes indistinguishable from the rest. The reason for such differences is that there's no source to get this information. The companies do not (and cannot) report who are their shareholders except for large shareholders and stakes of interest. These, in the case of GoPro, were identified during the IPO (you can look the filings up on EDGAR). You can get information from this or that publicly traded mutual fund about their larger holdings from their reports, but private investors don't provide even that. Institutional (public) investors buy and sell shares all the time and only report large investments. So there's no reliable way to get a snapshot picture you're looking for. There is no way to know anything about who has shorted stuff or how concentrated the positions are in a few investors.  Short positions are not even reported in 13(F) institutional filings. I'll take the bonus points, though, and point you to the US Equity Short Interest data source at quandl. "1. Most of the information you want can be found in the annual report of the company. Go to their official website, look for shareholders information and then download the annual report. This will answer: ""number of issued stock, voting rights, if there is more than one kind of stock, etc. In summary all the legal and formal details of a given stock. 2. After reading the annual report, check on investors websites to see if you can find analyst reports written on this company. You can sometimes find them in some free newsletters. These reports will complete the information you have found in the annual report like ""if the dividends are always paid, etc.""" It is also worth noting that one of the character defining features of a publicly traded company is that the management that is responsible for the day to day operations of the stands independent of those who have ownership. Shareholder of a public company typically don't have influence over the day to day running of the company. "You can see all the (millions) of trades per day for a US stock only if you purchase that data from the individual exchanges (NYSE, NASDAQ, ARCA, ...), from a commercial market data aggregator (Bloomberg, Axioma, ...), or from the Consolidated Tape Association.  In none of that data will you ever find identifying information for the traders. What you are recalling regarding the names of ""people from the company"" trading company stock is related to SEC regulations stating that people with significant ownership of company stock and/or controlling positions on the company board of directors must publicize (most of) their trades in that stock.  That information can usually be found on the company's investor relations website, or through the SEC website." "Discussing individual stocks is discouraged here, so I'll make my answer somewhat generic. Keep in mind, some companies go public in a way that takes the shares that are held by the investment VCs (venture capitalists) and cashes them out of their positions, i.e. most if not all shares are made public. In that case, the day after IPO, the original investors have their money, and, short of the risk of being sued for fraud, could not care less what the stock does.  Other companies float a small portion up front, and retain the rest. This is a way of creating a market and valuing the company, but not floating so many shares the market has trouble absorbing it. This stock has a ""Shares Outstanding"" of 2.74B but has only floated 757.21M. The nearly 2 billion shares held by the original investors certainly impact their wallets with how this IPO went.  See the key statistics for the details." Shareholders have voting rights, and directors have fiduciary obligations to shareholders. Sure, shareholders have rights to the dividends, but stock confers decisionmaking powers. I'm not really sure what your answer to this is, or how you are differentiating the concept of ownership from this. "I'm not the OP, but I'm happy to give a brief overview.  Basically, pre-JOBS act there were a lot of limits on who could make an equity investment in a non-public company (i.e. a startup or even a hedge fund). There were some loopholes, but basically you had to be an 'accredited investor'. An accredited investor was someone who either has made $200,000+ ($300,000+ for married people) for the past two years and expects to make that much again in the current year. Alternately, they could have a net worth of $1 million, excluding the value of their primary residence. There was also a limit of 500 investors for a non-public company before the company had to become public (they didn't really have to IPO, but they did have to file their financials with the SEC, so the effect was basically the same). Finally, non-public companies were prohibited from seeking investment through advertising basically. They couldn't take out an ad in a paper or event send a mass email and say, ""Hey, we're looking to raise a $1 million funding round, contact us if you're interested!""  Okay, now after the JOBS Act.  The JOBS Act changed a) the number and type of investors who could make equity investments in a non-public company b) the regulation of advertising for investments.  Post-JOBS private companies could have 2,000 shareholders and 500 of those could be unaccredited (e.g. regular people like you and I). The change in the number of shareholders isn't really that important because it's just shareholders of record, but that's another post for another day. There are still some requirements for unaccredited shareholder, which I don't remember off the top of my head. I think you have to have income of at least $40k. They also changed the solicitation ban, so it's possible that you might see an ad in the WSJ someday for a startup company, venture capital fund, hedge fund, etc.  There are some other things it changed, but IMO those are the two most important." "Stock price is determined by the buyers and sellers, correct? Correct! ""Everything is worth what its purchaser will pay for it""-Publius Syrus What causes people to buy or sell? Is it news? earnings? stock analysis and techniques? All of these things influence investors' perception of how much a stock is worth. If AMZN makes a lot of money one quarter, then the price might go up. But maybe public perception of AMZN changes because of a large scandal. This could cause the share price to decline even with the favorable earnings report. Why do these 'good' or 'bad' news make people want to buy/sell a stock? People invest to make money. If it looks like a company is going to take a turn for the worst, people will sell. If it looks like the company has a bright, cash-laden future in front of them, people will buy. News is one of the many factors people use to determine how well a company will do. Theoretically could a bunch of people short AMZN and drive down the price regardless of how well it is doing? Say investors wanted to boycott AMZN in order to drive down the cost and get some cheap shares. This is pretty silly, but say for the sake of the argument that everyone who owned AMZN decided to sell their shares and no other investor was willing to buy the shares for less than $0.01, then AMZN shares would be ""worth"" $0.01 in that aspect. That is extremely unlikely to happen, though, for two reasons:" "The usual pattern is that shareholders don't run companies in a practical sense, so ""if someone was just simply rich to buy > 50%, but does not know how to handle the company"" doesn't change anything. In large companies, the involvement of shareholders is limited to a few votes on key issues such as allocating profit (how much to keep in company vs pay in dividends) and choosing board members. And board members also don't run the company - they oversee how the company is being run, and choose executives who will actually run the company. If a rich person simply buys 50% and doesn't desire to get personally involved, then they just vote for whatever board members seem apropriate and forget about it." It doesn't matter which exchange a share was purchased through (or if it was even purchased on an exchange at all--physical share certificates can be bought and sold outside of any exchange). A share is a share, and any share available for purchase in New York is available to be purchased in London. Buying all of a company's stock is not something that can generally be done through the stock market. The practical way to accomplish buying a company out is to purchase a controlling interest, or enough shares to have enough votes to bind the board to a specific course of action. Then vote to sell all outstanding shares to another company at a particular fixed price per share. Market capitalization is an inaccurate measure of the size of a company in the first place, but if you want to quantify it, you can take the number of outstanding shares (anywhere and everywhere) and multiply them by the price on any of the exchanges that sell it. That will give you the market capitalization in the currency that is used by whatever exchange you chose. If you want to speculate on gold price you should always buy an ETF/ETC (Exchange Traded Commodity). The reasons are simple: Easy to buy and sell (one mouse click) Cheap to buy and sell (small bank commission), compared to buy real gold (always 6 to 12% comission to the local shop when you buy and when you sell), see this one it's one cheap gold buy/sell shop I found on the internet But if you sometimes feel unsecure that you might one day loose everything due to a major economy collapse event (like an armageddon), or not to have enough money in bad periods or during retirment, and it makes you feel better to know you buried 999 Gold Sovereign in your house backyard (along with a rifle as suggested in comments), then just buy them and live an happy life (as long as you hide your gold in good ways and write a good treasury map).