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Stocks to Watch: Allergan, Yahoo, Sysco, IHS

Among the companies with shares expected to trade actively in Tuesday’s session are Allergan PLC, Yahoo Inc. and Sysco Corp.

Allergan on Monday updated its financial projections for the second half of the year and said it expects revenue to increase 10% following the sale of its generics unit to Teva Pharmaceutical Industries Ltd. For the second half of the year, Allergan expects to make between $6.25 and $6.65 a share, excluding certain items, on more than $8 billion in revenue. For the first six months of the year, it reported profit of $8.71 a share on $9.99 billion in revenue. In May, before the deal to sell the generics unit to Teva, the company had projected adjusted earnings for the year between $17 and $18.50 a share on $20.5 billion to $21 billion in revenue.

Yahoo’s bold plan to spin off more than $20 billion worth of shares in Alibaba Holding Group Ltd. without incurring a tax bill just got riskier. The Internet company said in a filing Monday it will move forward with the spinoff despite not having approval from tax regulators. The Internal Revenue Service earlier...