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Top Analyst Upgrades and Downgrades: Apple, BHP Billiton, Broadcom, McDonald's, Sophiris, Tech Data and More

Allegheny Technologies Inc. (NYSE: ATI) was raised to Buy from Hold at Deutsche Bank.

Barracuda Networks Inc. (NYSE: CUDA) was raised to Overweight from Sector Weight at Pacific Crest.

Gemphire Therapeutics Inc. (NASDAQ: GEMP) at was started as Buy with a $15 price target (versus a $10.15 close) at Jefferies. The firm said that Gemcabene is being developed to address the large and evolving global dyslipidemia market. RBC also started it as Outperform with a $25 price target. Canaccord Genuity started it as Buy with a $17 price target.

Gigamon Inc. (NYSE: GIMO) was started as Hold at Stifel.

HEICO Corp. (NYSE: HEI) was downgraded to Neutral from Buy with an unchanged price objective of $75 at Merrill Lynch.

Imperva Inc. (NYSE: IMPV) was downgraded to Sector Weight from Overweight at Pacific Crest.

Inphi Corp. (NYSE: IPHI) was started as Overweight at JPMorgan.

Karyopharm Therapeutics Inc. (NASDAQ: KPTI) was raised to Buy from Hold and the price target was raised to $12 from $9 (versus a $7.12 close) at Jefferies. The call is based on its future revenue opportunity in multiple myeloma.

ManTech International Corp. (NASDAQ: MANT) was downgraded to Underperform from Market Perform at Wells Fargo.

ONE Gas Inc. (NYSE: OGS) was started as Market Perform at Wells Fargo.

Signet Jewelers Ltd. (NYSE: SIG) was downgraded to Neutral from Overweight with a $90 price target (versus an $80.18 close) at JPMorgan.

Tesaro Inc. (NASDAQ: TSRO) was started as Neutral and was assigned a $97 price objective (versus a $76.54 close) at Merrill Lynch.

Elsewhere in research and analyst calls:

Monday’s top analyst upgrades and downgrades included Harley-Davidson, HP, KeyCorp, KLA-Tencor, Netflix, Square, T-Mobile and a dozen more.

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