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A who’s who of government, business and international finance lost a total of more than $600 million they had invested in scandal-plagued Theranos Inc., according to previously sealed documents made public in a lawsuit. High on the list is Education Secretary Betsy DeVos, whose family invested $100 million in the Silicon Valley blood-testing company, the documents show. Mrs. DeVos had previously disclosed that her family was a Theranos investor in a government filing, but the size of the investment wasn’t known. (Carreyrou, 5/3)

The company became a Silicon Valley fairy tale, with investors awarding the privately held company a valuation of around $9 billion. But the story began to unravel in October 2015 after The Wall Street Journal, owned by Mr. Murdoch’s News Corp., began questioning whether the tests worked. Theranos became the subject of federal investigations into its testing and claims of proprietary technology, which were called “nanotainers.” Much of the time the company had to resort to using conventional blood testing methods, unable to get federal approval for any test but one for Herpes. Theranos and its founder also became embroiled in a series of lawsuits, involving investors as well as one of its key partners, Walgreens, a large drugstore chain, where it offered its tests. The company reached a settlement with Walgreens last August. (Abelson and Thomas, 5/4)

TriHealth asked its vice president of finance to shadow executives at an affiliated health system. Sending a senior executive off-site to expand his perspective was part of the Cincinnati-based health system's leadership institute, which aims to develop the skills of some 1,000 administrative and physician executives and prepare them for new roles. While many executives move around within their organization's network, the approach aimed to expose the employee—who had spent much of his career at TriHealth—to another corporate culture and operations. (Kacik, 5/5)

Hospital giant Partners HealthCare, looking to fortify its position in the rapidly changing health care market, is in potential merger negotiations with Harvard Pilgrim Health Care, one of the state’s largest medical insurers. ... Any deal is likely to face scrutiny in a state where policy makers and consumer groups are focused on controlling medical costs. (Dayal McCluskey, 5/4)