No insider sale for Chen or Fairfax/WatsaChen has approx 7,225,000 common shares, Fairfax has over 47,000,000 common shares (not to mention $330m of convertible debentures which represent another 55m shares). No share sales reported as of todays insider summaries (per INK Research).
Either they felt the door opening was to narrow to allow them to sell, or they possess material infomation that prevented then from selling, or they feel a better time to sell will come