How did my number of shares get reduced?
How can they reduce the number of shares I hold? They may have purchased them.  You don't say what stock it is, so we can only speculate.  Let's say that the stock is called PENNY.  So they may have taken your 1600 PENNY shares and renamed them to 1600 PENNYOLD shares.  Then they created a new $5 PENNY share and gave you .2357 shares of that in exchange for your 1600 PENNYOLD shares.  This suggests that your old shares were worth $1.1785 or less than a tenth of a cent each.   As an example, MYLAN did this in 2015 as part of their tax inversion (moved official headquarters from the US to Europe).  They did not change the number of shares at that time, but MYLAN is not a penny stock.   This is the kind of thing that might happen in a bankruptcy.   A reverse split (where they give you one share in exchange for more than one share) is also possible, although you received an odd amount for a reverse split.  Usually those produce rounder numbers.  A number like .2357 sounds more like a market price, as those can be bizarre. Your question is missing information. The most probable reason is that the company made a split or a dividend paid in stock and that you might be confusing your historical price (which is relevant for tax purposes) with your actual market price. It is VERY important to understand this concepts before trading stocks.
Unlike the stock market which offers growth long term, the derivatives market is a zero sum game.  This phrase is how one describes a poker game. 7 people walk in, and walk out with the same total amount of money (note, the 7th guy is the 'house', and with nothing at risk, he gets his cut). No money is created, the total value doesn't change.  When I buy or sell an option, there is someone on the other side of that trade with a gain or loss equal and opposite to my position. At option expiration, or a repurchase that closes an open contract, the whole series of trades resulted in no net gain of wealth.  The huge losses were spread among the banks, the investors, the insurance companies, and the government. By government, I mean the taxpayer. You paid your share, my friend, as did I. Welcome to Money.SE. Get to 150 rep, and vote in the election. "We change it every so often to reduce fraud. If you're absolutely sure you didn't just send money to a scammer impersonating a landlord, this has nothing to do with fraud-- they're playing a game with you. By changing the account number frequently, it makes it more likely you make a mistake in entering the payment account. When they come back to you a few days past due saying ""we never received your rent,"" you'll eventually realize it got sent to the wrong account. Now you owe them late fees, and there's really nothing you can do about it-- you did not in fact pay them on time; you sent it to the wrong account! It's an easy way for them to collect an additional few thousand dollars a year. Anytime a small business or landlord says they have to do something ""weird"" to reduce fraud, chances are it's a pretense to you getting hosed in some way." Does this make sense? I'm concerned that by buying shares with post tax income, I'll have ended up being taxed twice or have increased my taxable income. ... The company will then re-reimburse me for the difference in stock price between the vesting and the purchase share price. Sure.  Assuming you received a 100-share RSU for shares worth $10, and your marginal tax rate is 30% (all made up numbers), either: or So you're in the same spot either way.  You paid $300 to get $1,000 worth of stock. Taxes are the same as well.  The full value of the RSU will count as income either way, and you'll either pay tax on the gains of the 100 shares in your RSU our you'll pay tax on gains on the 70 shares in your RSU and the 30 shares you bought.  Since they're reimbursing you for any difference the cost basis will be the same (although you might get taxed on the reimbursement, but that should be a relatively small amount). This first year I wanted to keep all of the shares, due to tax reasons and because believe the share price will go up. I don't see how this would make a difference from a tax standpoint. You're going to pay tax on the RSU either way - either in shares or in cash.  how does the value of the shares going up make a difference in tax? Additionally I'm concerned that by doing this I'm going to be hit by my bank for GBP->USD exchange fees, foreign money transfer charges, broker purchase fees etc.  That might be true - if that's the case then you need to decide whether to keep fighting or decide if it's worth the transaction costs. The stock market is just like any other market, but stocks are bought and sold here. Just like you buy and sell your electronics at the electronics market, this is a place where buyers and sellers come together to buy and sell shares or stocks or equity, no matter what you call it. What are these shares?  A share is nothing but a portion of ownership of a company. Suppose a company has 100 shares issued to it, and you were sold 10 out of those, it literally means you are a 10% owner of the company. Why do companies sell shares? Companies sell shares to grow or expand. Suppose a business is manufacturing or producing and selling goods or services that are high in demand, the owners would want to take advantage of it and increase the production of his goods or services. And in order to increase production he would need money to buy land or equipment or labor, etc. Now either he could go get a loan by pledging something, or he could partner with someone who could give him money in exchange for some portion of the ownership of the company. This way, the owner gets the money to expand his business and make more profit, and the lender gets a portion of profit every time the company makes some. Now if the owner decides to sell shares rather than getting a loan, that's when the stock market comes into the picture. Why would a person want to trade stocks? First of all, please remember that stocks were never meant to be traded. You always invest in stocks. What's the difference? Trading is short term and investing is long term, in very simple language. It's the greed of humans which led to this concept of trading stocks. A person should only buy stocks if he believes in the business the company is doing and sees the potential of growth. Back to the question: a person would want to buy stocks of the company because: How does a stock market help society? Look around you for the answer to this question. Let me give you a start and I wish everyone reading this post to add at least one point to the answer. Corporations in general allow many people come together and invest in a business without fear that their investment will cause them undue liability - because shareholders are ultimately not liable for the actions of a corporation. The cornerstone North American case of how corporations add value is by allowing many investors to have put money towards the railroads that were built across America and Canada. For The stock market in particular, by making it easier to trade shares of a company once the company sells them, the number of people able to conveniently invest grows exponentially. This means that someone can buy shares in a company without needing to knock door to door in 5 years trying to find someone to sell to. Participating in the stock market creates 'liquidity', which is essentially the ease with which stocks are converted into cash. High liquidity reduces risk overall, and it means that those who want risk [because high risk often creates high reward] can buy shares, and those who want low risk [because say they are retiring and don't have a risk appetite anymore] can sell shares. "Companies normally do not give you X% of shares, but in effect give you a fixed ""N"" number of shares. The ""N"" may translate initially to X%, but this can go down. If say we began with 100 shares, A holding 50 shares and B holding 50 shares. As the startup grows, there is need for more money. Create 50 more shares and sell it at an arranged price to investor C. Now the percentage of each investor is 33.33%. The money that comes in will go to the company and not to A & B.   From here on, A & C together can decide to slowly cut out B by, for example: After any of the above the % of shares held by B would definitely go down." "You didn't win in case B. Borrowing shares and then selling them is known as ""selling short"".  You received $2000 when you sold short 100 shares at $20.  You spent $1000 to buy them back at $10, so you come out $1000 ahead on that deal.  But at the same time, the 100 shares you already owned have declined in value from $20 to $10, so you are down $1000 on that deal.  So you've simply broken even, and you are still out the interest and transaction fees. In effect, a short sale allows you to sell shares you don't own.  But if you do already own them, then the effect is the same as if you just sold your own shares.  This makes it easier to see that this is just a complicated and expensive way of accomplishing nothing at all." In common with many companies, Microsoft has been engaging in share buyback programmes, where it buys its own shares in the market and then cancels them. It's often a more tax-efficient way to distribute profits to the shareholders than paying a dividend. So there were more Microsoft shares in circulation in 1999 than there are now. See here for information. Do a share split.  Your initial 1 share each becomes 10 (or 100) shares each,  then you can sell/gift/etc shares as needed.