Illumina-Grail Deal Challenge Case Must Be Unsealed, Judge Says

Illumina Inc. lost its bid Thursday to keep a lid on a pension fund lawsuit blaming its board for the costly fallout of its failed $7 billion deal to acquire Grail Inc.

The gene sequencing giant failed to show that disclosing redacted information would do Illumina any meaningful damage, such as by harming its competitive standing or undermining settlement negotiations, a Delaware judge said in a 14-page ruling. The lawsuit targets the company’s current and former directors.

“To shield the information for which continued confidential treatment is sought from the public and the Fourth Estate, the company must demonstrate a ...