Certainly, I too was restricted at my company: no shorting (of any stocks!) and no buy/selling of stocks x-days before earnings announcements. A part from that,

Certainly, I too was restricted at my company: no shorting (of any stocks!) and no buy/selling of stocks x-days before earnings announcements. A part from that, you could trade without any other contractual restrictions. The determination of material information wasn't not decided by the company... and I guess it's something that is is only brought up in case of an investigation.