One of their major shareholders being bought out doesn't require an announcement. If they had been approached then that's a different thing.
What investor would be annoyed about a potentially possible interest by another company taking a large position in their company. If his were to go ahead they would shareholder approval anyway as it's greater than 19.9%.
Just relax and enjoy the ride.
SIR Price at posting:
$3.25 Sentiment: Buy Disclosure: Held