原则上，WBMD的股票是按比例回购，但是如果你拿的股份数少于100股的话，会全额回购。所以，有IB的同学，可以买99股WBMD。然后，IB 中的Message center 中的cooperation action 里会给你发条消息，问你参不参与交易。按说明，自己选好就行。当然，英文不好的同学就别参与了。
How many shares will the Company purchase in the Offer?
We will purchase up to 2,000,000 shares in the Offer (representing approximately 5.1% of our outstanding shares, including shares of unvested restricted stock), or if a lesser number of shares are properly tendered, all shares that are properly tendered and not properly withdrawn. If more than 2,000,000 shares are properly tendered, we will purchase all shares properly tendered on a pro rata basis, except for “odd lots” (lots held by owners of fewer than 100 shares), which we will purchase on a priority basis, and conditional tenders whose condition was not met, which we will not purchase (except as described in Section 6). We also expressly reserve the right to purchase additional shares, up to 2% of our outstanding shares (approximately 0.8 million shares, based on 39,181,219 shares of our common stock issued and outstanding as of November 10, 2016, including shares of unvested restricted stock), without extending the Offer, and could decide to purchase more shares, subject to applicable legal requirements. See Sections 1 and 7.