GeneDx Holdings Corp.: WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC discloses a stake of more than 5% (Schedule 13G)

William Blair Investment Management LLC disclosed a stake exceeding 5% in GeneDx Holdings Corp. via a Schedule 13G filing with the SEC (accession 0001644956-26-000030). The filing signals that the institutional manager has crossed the 5% beneficial ownership threshold in the genomics company, a level that typically draws investor attention to a concentrated position. The disclosure comes as a passive-style regulatory notification rather than an activist filing, indicating no stated intent to influence company strategy. Investors will watch for further 13G amendments or 13D filings to gauge whether William Blair's position grows or shifts toward activism.