PacBio's shares skyrocketed 76 percent in November on the news that Illumina plans to acquire the firm for $1.2 billion in cash.
After six straight months of gains, the index saw a sharp drop in October that even positive earnings news could not stave off.
The company's shares grew 28 percent in September after it terminated a licensing deal with BioMérieux and regained control of certain intellectual property.
CareDx led the Index for the month — the firm's shares rose 81 percent on the strength of its second quarter earnings report.
Proceeds from the offering, expected to close on or about Aug. 14, could be used to fund acquisitions, to repay existing debts, or for working capital.
Natera led the Index for the second month in a row after it announced that it intended to raise $75 million in a public stock offering.
Natera led the Index with a 61 percent increase in stock price, driven by the firm's announcement that it was entering the transplantation market.
The study solidified how doctors should interpret and act upon an intermediate result from the breast cancer risk test in how to treat early-stage patients.
Though the Dow, the Nasdaq, and the Nasdaq Biotechnology Index all rose in May, they were outperformed by the GenomeWeb Index.
Positive first quarter earnings reports lifted many stocks of life science tools firms even as the broader biotechnology market suffered.
Senator Lamar Alexander (R-Tenn.), who chairs the Senate health committee, will be retiring at the end of his term, Stat News reports.
UCSF researchers find that having two X chromosomes may contribute to women's longer lifespans, according to Discover's D-brief blog.
The Wall Street Journal reports on the US Centers for Disease Control and Prevention's use of genetic approaches to study foodborne illnesses.
In PNAS this week: immune cell profiling of wild baboons by social status, metabolomics profiling of esophageal tumors, and more.