Polypore International Inc.(NYSE:PPO): After Polypore dropped sharply on news that LG Chem would begin to compete with Polypore by producing battery separators, Stifel Nicolaus notes that Polypore said it remains confident in the expansion of its battery separator business. The firm maintains a $72 target and reiterates a Buy rating on Polypore.

Westport Innovations Inc.(NASDAQ:WPRT): Lazard Capital raised its price target for Westport Innovations after meetings with management and industry contacts indicated growing potential for the company’s natural gas engines. The firm keeps a Buy rating on the stock.

Seagate Technology.(NASDAQ:STX): Baird raised its price target on Seagate following Q2 results. The firm cited higher Q3 guidance and Q4 outlook, its plans to return cash to shareholders, and continued supply constraints. Shares are Outperform rated. This note corrects the prior price target.

Hologic Inc.(NASDAQ:HOLX): Argus raised its target on Hologic as it believes that the company reported strong Q1 results. The firm believes that the company’s products are selling well and it maintains a Buy rating.

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