RSU vested recently
ML is a brokerage firm. Tell them to sell. If you can't or don't know how to do it on-line - call them and do it over the phone. Your citizenship might come in effect when tax are withheld, you need to fill form W8-BEN if you haven't done so yet. If US taxes are withheld, you can file 1040NR to request refund, or get it credited against your local tax liabilities.
I see several interesting statement in your question.  A. my only income is from my Employer B. I also receive employer stock (ESPP, RSU, NSO). However, employer withholds taxes for these stock transactions through my broker (I see them broken down on my W2).  C. I have been subject to Alternative Minimum Tax. A implies a simple tax return. B and C tell the opposite story. In fact if B is not done correctly The amount withheld due to payroll may be perfect but the under withholding could be due to the ESPP's, RSUs and NSOs.  The AMT can throw everything else out the window.  If a person has a very simple tax situation: Income doesn't change a lot from paycheck to paycheck; they take the standard deduction; the number of exemptions equals the number of people in the family. Then the withholding is very close to perfect.  The role of the exemptions on the W-4 is to compensate for situations that go above the standard deduction. The role of extra withholding is when the situation requires more withholding due to situations that will bring in extra income or if the AMT is involved. From the instructions: If you do not need to make any adjustments to the basis or type of   gain or loss (short-term or long-term) reported to you on Form 1099-B   (or substitute statement) or to your gain or loss for any transactions   for which basis has been reported to the IRS (normally reported on   Form 8949 with box A checked), you do not have to include those   transactions on Form 8949. Instead, you can report summary information   for those transactions directly on Schedule D. For more information,   see Exception 1, later. However, in case of ESPP and RSU, it is likely that you actually do need to make adjustments. Since 2014, brokers are no longer required to track basis for these, so you better check that the calculations are correct. If the numbers are right and you just summarized instead of reporting each on a separate line, its probably not an issue. As long as the gains reported are correct, no-one will waste their time on you. If you missed several thousand dollars because of incorrect calculations, some might think you were intentionally trying to hide something by aggregating and may come after you. I've seen many buyouts in my own portfolio, including the company I worked for.  There have been several different scenarios: The terms of the deal are subject to the deal -- frankly whatever makes sense to the buyer and that is accepted by the seller. So sometimes brokers charge reorganization fees.  check into those for your broker.  I've not seen one in a while, but my brokerage account is substantial, and often that's a perk they offer higher-value accounts. Also watch out for taxes.  The transaction where my employer was bought by another publicly traded company -- we got bit because the IRS treated it as a taxable transaction, and all our RSUs were effectively sold and then repurchased.  So we ended up with a big tax bill (capital gains) without any cash to offset the big tax bill.  I suspect its because my old employer was a US based company, whereas the new company is not. "This is the best tl;dr I could make, [original](http://www.businessinsider.com/rest-and-vest-millionaire-engineers-who-barely-work-silicon-valley-2017-7) reduced by 96%. (I'm a bot) ***** &gt; OGs refer to engineers who worked at the company before the IPO. &amp;quot;Their Facebook stock quadruples and they don&amp;#039;t leave. They are really good engineers, really indispensable. And then they start to pull 9-5 days,&amp;quot; this person said.  &gt; Facebook declined to comment but several engineers told us that Facebook has a reputation of requiring long hours from their engineers.  &gt; &amp;quot;Most of my friends at Google work four hours a day. They are senior engineers and don&amp;#039;t work hard. They know the Google system, know when to kick into gear. They are engineers, so they optimized the performance cycles of their own jobs,&amp;quot; one engineer described.   ***** [**Extended Summary**](http://np.reddit.com/r/autotldr/comments/6s69a6/inside_the_world_of_silicon_valleys_coasters_the/) | [FAQ](http://np.reddit.com/r/autotldr/comments/31b9fm/faq_autotldr_bot/ ""Version 1.65, ~185383 tl;drs so far."") | [Feedback](http://np.reddit.com/message/compose?to=%23autotldr ""PM's and comments are monitored, constructive feedback is welcome."") | *Top* *keywords*: **engineer**^#1 **work**^#2 **company**^#3 **vest**^#4 **Google**^#5" You'd probably have to sue them to get the money. In most cases those statements have disclaimers all over them telling you about the vesting period and technically that extra money was probably never really in your account.  Normally the statements also break out the actual contributions from the employer match part and have a footnote about the vesting policy. Unless the employer was completely incompetent in their management of this account, I am betting they will have documentation of the policy that you supposedly were given.  You probably have very slim chances of prevailing on this unless they were very lax in their documentation. I'd say re-check the statements and your employee manually carefully for any mention of vesting. If you don't find it, ask the employer (nicely) where you were notified of this. If they still can't produce any documentation, then sue them. Terminology aside.  Your gains for this year in a mutual fund do seem low.  These are things that can be quickly, and precisely answered through a conversation with your broker. You can request info on the performance of the fund you are invested in from the broker.  They are required to disclose this information to you.   They can give you the performance of the fund overall, as well as break down for you the specific stocks and bonds that make up the fund, and how they are performing. Talk about what kind of fund it is.  If your projected retirement date is far in the future your fund should probably be on the aggressive side.  Ask what the historic average is for the fund you're in.  Ask about more aggressive funds, or less if you prefer a lower average but more stable performance.  Your broker should be able to adequately, and in most cases accurately, set your expectation. Also ask about fees.  Good brokerages charge reasonable fees, that are typically based on the gains the fund makes, not your total investment.  Make sure you understand what you are paying. Even without knowing the management fees, your growth this year should be of concern.  It is exceptionally low, in a year that showed good gains in many market sectors.  Speak with your broker and decide if you will stick with this fund or have your IRA invest in a different fund. Finally JW8 makes a great point, in that your fund may perform well or poorly over any given short term, but long term your average should fall within the expected range for the type of fund you're invested in (though, not guaranteed). MOST importantly, actually talk to your broker.  Get real answers, since they are as easy to come by as posting on stack. I assume US as mhoran_psprep edited, although I'm not sure IRS necessarily means US. (It definitely used to also include Britain's Inland Revenue, but they changed.)  (US) Stockbrokers do not normally withhold on either dividends/interest/distributions or realized capital gains, especially since gains might be reduced or eliminated by later losses. (They can be required to apply backup withholding to dividends and interest; don't ask how I know :-) You are normally required to pay most of your tax during the year, defined as within 10% or $1000 whichever is more, by withholding and/or estimated payments. Thus if the tax on your income including your recent gain will exceed your withholding by 10% and $1000, you should either adjust your withholding or make an estimated payment or some combination, although even if you have a job the last week of December is too late for you to adjust withholding significantly, or even to make a timely estimated payment if 'earlier in the year' means in an earlier quarter as defined for tax (Jan-Mar, Apr-May, June-Aug, Sept-Dec). See https://www.irs.gov/businesses/small-businesses-self-employed/estimated-taxes and for details its link to Publication 505. But a 'safe harbor' may apply since you say this is your first time to have capital gains. If you did not owe any income tax for last year (and were a citizen or resident), or (except very high earners) if you did owe tax and your withholding plus estimated payments this year is enough to pay last year's tax, you are exempt from the Form 2210 penalty and you have until the filing deadline (normally April 15 but this year April 18 due to weekend and holiday) to pay. The latter is likely if your job and therefore payroll income and withholding this year was the same or nearly the same as last year and there was no other big change other than the new capital gain. Also note that gains on investments held more than one year are classified as long-term and taxed at lower rates, which reduces the tax you will owe (all else equal) and thus the payments you need to make. But your wording 'bought and sold ... earlier this year' suggests your holding was not long-term, and short-term gains are taxed as 'ordinary' income. Added: if the state you live in has a state income tax similar considerations apply but to smaller amounts. TTBOMK all states tax capital gains (and other investment income, other than interest on exempt bonds), and don't necessarily give the lower rates for long-term gains. And all states I have lived in have 'must have withholding or estimated payments' rules generally similar to the Federal ones, though not identical. i cannot directly tell from the provided information if it is already included in Net A/R but if there is a balance sheet you can check yourself if the Total Cash Flow matches the difference between cash position year 0&amp;1 and see if it is net or still to be included.