Venture Capital Cross, a Division of R.F. Lafferty & Co. Inc. will monitor your portfolio for you and provide prompt notification if there is a bid in a name you hold.  This service is totally free, all you need to do is provide your share counts and class of shares, in companies which you own shares. 

Private markets can be slow and fast, meaning that it might take years for the market to reach a critical mass of demand; but when it comes there can be extreme disbalance (such as more buyers than sellers).  When that happens, you want to be ready to respond.

Our Portfolio Monitoring service will notify you immediately if there is an indication that might cross against your position, whether you are a seller or not would remain your choice.   In other words, this is a free information service not a sell indication.