Zacks Investment Research has upgraded shares of workers' compensation insurance provider Employers Holdings Inc. from a "hold" rating to a "strong-buy" rating in a research note published Tuesday, according to the Daily Quint.

Shares of Employers Holdings opened at $29.90 on Tuesday. The company has a 12-month low of $22.58 and a high of $32.03.

The company's executive vice president of corporate and public affairs, Ann Nelson, sold more than 20,000 shares of stock in the company in October. She sold the shares for an average of $30 apiece for a total of $613,740.

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