We continue to track the short interest changes in a number of solar PV and installation companies. The following information is based on data reported for the two-week period ending April 30.

Canadian Solar Inc. (NASDAQ: CSIQ) saw short interest rise by 0.3% to 3.22 million shares, about 8% of the company’s total float. In the two-week short interest period to April 30, shares rose nearly 8%, but they’re down about 11.7% year to date through Friday to close at $26.32. The stock’s 52-week range is $6.81 to $44.50.

First Solar Inc. (NASDAQ: FSLR) saw short interest fall by 14.4% to 8.75 million shares, which represents 12.1% of the company’s float. In the two-week short interest period to April 30th, shares gained about 1.7% and are up about 16% year-to-date through Friday’s close at $63.21. The stock’s 52-week range is $35.59 to $74.84.

SunEdison Inc. (NYSE: SUNE) showed an increase of 2.1% in short interest, to 58.14 million shares. About 21.9% of the company’s stock is now short. In the latest two-week short interest period, shares gained nearly 14% and are up more than 28% year-to-date through Friday’s close. The stock’s 52-week range is $3.95 to $19.05, and shares last closed at $16.74.

Sunpower Corp. (NASDAQ: SPWR) saw a short interest drop of 1.3% to 12.79 million shares, 30.3% of the company’s total float. In the two-week short interest period to April 30th, shares gained 25% but are up just 10.7% year to date after closing at $33 on Friday. The stock’s 52-week range is $17.52 to $37.14.

SolarCity Corp. (NASDAQ: SCTY) showed a rise of 4.3% in short interest to 10.01 million shares, or 24.4% of the company’s float. In the two-week short interest period, shares rose 3.7% but are down 8.4% for the year through Friday’s close. The stock’s 52-week range is $28.31 to $88.35, and shares closed at $52.04 on Friday.

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