Alexion Pharmaceuticals

Among leading biotech and emerging pharmaceutical companies, short sellers moved on BioMarin Pharmaceutical (NASDAQ: BMRN), Celgene (NASDAQ: CELG) and Regeneron Pharmaceuticals (NASDAQ: REGN) the most between the August 30 and September 13 settlement dates. The number of shares sold short in...

Declining short interest in Alexion Pharmaceuticals (NASDAQ: ALXN) and Pharmacyclics (NASDAQ: PCYC) bucked the trend among leading biotech and emerging pharmaceutical companies between the August 15 and August 30 settlement dates. The number of shares sold short in Amgen (NASDAQ: AMGN), Biogen...

Among leading biotech and emerging pharmaceutical companies, Celgene (NASDAQ: CELG), Onyx Pharmaceuticals (NASDAQ: ONXX) and Vertex Pharmaceuticals (NASDAQ: VRTX) saw significant percentage declines in short interest between the July 31 and August 15 settlement dates. Short sellers also shied away...

Among biotech and emerging pharmaceutical companies, Amgen (NASDAQ: AMGN), Onyx Pharmaceuticals (NASDAQ: ONXX) and Pharmacyclics (NASDAQ: PCYC) saw the most significant percentage declines in short interest between the June 28 and July 15 settlement dates. Short sellers also shied away from...

Among biotech and emerging pharmaceutical companies, Gilead Sciences (NASDAQ: GILD) and Onyx Pharmaceuticals (NASDAQ: ONXX) saw the most significant rises in short interest between the June 14 and June 28 settlement dates. The number of shares sold short in Amgen (NASDAQ: AMGN), Arena...

Among biotech and emerging pharmaceutical companies, Celgene (NASDAQ: CELG) and saw the most significant rise in short interest between the May 31 and June 14 settlement dates. The number of shares sold short in Onyx Pharmaceuticals (NASDAQ: ONXX), Pharmacyclics (NASDAQ: PCYC) and Regeneron...

Among biotech and emerging pharmaceutical companies, Biogen Idec (NASDAQ: BIIB), saw the most significant rise in short interest between the May 15 and May 31 settlement dates. The number of shares sold short in Amgen (NASDAQ: AMGN), Dendreon (NASDAQ: DNDN), Onyx Pharmaceuticals (NASDAQ: ONXX)...

Among biotech and emerging pharmaceutical companies, Regeneron Pharmaceuticals (NASDAQ: REGN) and Vertex Pharmaceuticals (NASDAQ: VRTX) saw he most significant rise in short interest between the April 30 and May 15 settlement dates. The number of shares sold short in Alexion Pharmaceuticals (...

The short interest moves in biotech and emerging pharmaceutical companies were mixed in the latter two weeks of April. The number of shares sold short in Dendreon (NASDAQ: DNDN), Gilead Sciences (NASDAQ: GILD), Illumina (NASDAQ: ILMN), Onyx Pharmaceuticals (NASDAQ: ONXX) and VIVUS (NASDAQ: VVUS)...

The short interest moves in biotech and emerging pharmaceutical companies were mixed in the first two weeks of April. The number of shares sold short in Alexion Pharmaceuticals (NASDAQ: ALXN), Amgen (NASDAQ: AMGN), Biogen Idec (NASDAQ: BIIB), Dendreon (NASDAQ: DNDN), Gilead Sciences (NASDAQ: GILD...

The short interest in biotech and emerging pharmaceutical companies was mixed in the final two weeks of March. The number of shares sold short in Alexion Pharmaceuticals (NASDAQ: ALXN), Arena Pharmaceuticals (NASDAQ: ARNA), Illumina (NASDAQ: ILMN), Onyx Pharmaceuticals (NASDAQ: ONXX), Vertex...

The short interest in biotech and emerging pharmaceutical companies was mixed again in the first two weeks of March. The number of shares sold short in Arena Pharmaceuticals (NASDAQ: ARNA), Dendreon (NASDAQ: DNDN), Illumina (NASDAQ: ILMN) and VIVUS (NASDAQ: VVUS) grew somewhat between the...

The short interest in biotech and emerging pharmaceutical companies was mixed again in the final two weeks of February. The number of shares sold short in Alexion Pharmaceuticals (NASDAQ: ALXN), Arena Pharmaceuticals (NASDAQ: ARNA), Dendreon (NASDAQ: DNDN), Gilead Sciences (NASDAQ: GILD), Onyx...

The short interest in biotech and emerging pharmaceutical companies was mixed again in the first two weeks of February. The number of shares sold short in Arena Pharmaceuticals (NASDAQ: ARNA), Illumina (NASDAQ: ILMN) and Vertex Pharmaceuticals (NASDAQ: VRTX) grew somewhat between the January 31...

The short interest in biotech and emerging pharmaceutical companies was mixed again in the latter two weeks of January. The number of shares sold short in Arena Pharmaceuticals (NASDAQ: ARNA), Dendreon (NASDAQ: DNDN), Gilead Sciences (NASDAQ: GILD), Vertex Pharmaceuticals (NASDAQ: VRTX) and VIVUS...