The reason there is no notice is because they havent bought any shares back yet, only the days following a purchase require a notice to keep everyone informed. The example company you gave, GRF, is obviously purchasing shares everyday.
In reply to your answer to me, this first come first serve basis seems to me your a little confused with the process. Oxx is in the market for shares like everyone else, so if you aren't interested in selling your shares at the current price on market why would you want to sell them at the current price to the company. Maybe I missed something in your thinking. Happy to discuss further with you.
Wassa.
OXX Price at posting:
11.5¢ Sentiment: None Disclosure: Held