Hi
35% allocation to a single stock seems a bit risky for concentration risk. Depend on the size of the portfolio, i would suggest 5 to 10 companies (unless you have million dollars of fund, you can increase the number of the companies).
For example, I am holding about 5 stocks and average about 20% per stock. If i have high conviction on the stock, i may deviate 20% rules and increase to 25-30% range for awhile. If i dont feel comfortable, i will sell down the stock to reduce the size of the portfolio.
Happy investing!
Chenge