Thanks for your input. Unfortunately, as long as I am employed there I have no choice but to leave it mostly in company stock.
Wow... what a bummer....
Don't quit (jobs are hard to find right now!!) but you might want to check with your HR department or whoever runs the 401k and ask if they've considered opening up other investment options.
Taking it out right now would mean a huge tax hit UNLESS you roll it over into a standard IRA. According to the IRS website, you can avoid any tax consequences if you roll over your 401k to a traditional IRA. Here's a link:
http://www.irs.gov/retirement/article/0,,id=160469,00.html
If I were in your position, here's what I would do:
I would roll over 100% of my current 401k into a traditional IRA. There are any number of reputable investment companies you can roll over to. Smith-Barney, Templeton, Fidelity, ScotTrade, E*Trade, etc are all examples, but personally I would recommend Vanguard.
Vanguard is noted for having very low commission rates, and a wide variety of funds to choose from.
I don't work for Vanguard and have no connection to the company other than the fact that I've heard a lot of favorable things about them.
www.vanguard.com or the personal investor page:
https://personal.vanguard.com/us/home?fromPage=portal
More than likely you can call their customer service (or any other financial management company's customer service!) and they'll probably be able to talk you through the process or even take care of most of the work for you.
Once you've transferred or rolled over your 401k balance, (it will probably be transferred to your IRA as your own company's stock) you can, inside your new IRA, cash in the company stock and re-invest in mutual funds that will greatly spread out (and therefore greatly diminish) your financial risk....
Remember, this doesn't mean you'll have to end your company 401k. It will continue, but at least you'll be able to safeguard the amount you already have. If a year or two goes by and you accumulate another big company 401k balance, you can always choose again to roll it over or leave it where it is.
Even if you don't want to mess with any of the above, at the very least you might want to talk to a CPA or financial advisor. (Find one who charges by the hour, rather than one who makes his money selling on commission - you'll get better advice. If you talk to someone who wants to sell you something like "whole life" life insurance or some sort of annuity, the odds are he's out to make money for himself, rather than you!)
Best of luck to you!