Your response is simply false. Yes, permanently
Post# of 30028
Yes, permanently. There is no mechanism for AMBS to redeem his 250,000 shares of Series F. (I guess he could voluntarily sell them back to the company - but you would hear about that.)
And his 250,000 shares of Series F are not convertible - so he can't convert them to common and sell (even if they were registered - which they are not). So he still holds all of those shares.