OK. There's way too much speculation and misinformation going on here on the topic of what is required disclosure by the SEC for listed US companies.
Here's what the SEC says is ..."The comprehensive list of prescribed corporate events that are presumptively material and that must be disclosed, or will likely be required to be disclosed, with the U.S. SEC on Form 8-K:"
• Changes in control of a company;
• A company’s acquisition or disposition of a significant amount of assets;
• A company’s bankruptcy or receivership;
• Changes in a company’s certifying accountant;
• Resignations of a company’s directors, circumstances for the departure of a director, the appointment or departure of a principal officer, and the election of new directors other than pursuant to a vote of security holders at an annual meeting;
• Change in a company’s fiscal year and amendments to a company’s articles of incorporation or bylaws that were not previously disclosed in a proxy statement or other such disclosure document;
• Entry into a material agreement not made in the ordinary course of business;
• Termination of a material agreement not made in the ordinary course of business;
• Termination or reduction of a business relationship with a customer that constitutes a specified amount of the company’s revenues;
• Creation of a direct or contingent financial obligation that is material to the company;
• Events triggering a direct or contingent financial obligation that is material to the company, including any default or acceleration of an obligation;
• Exit activities including material write-offs and restructuring charges;
• Any material impairment;
• A change in a rating agency decision, issuance of a credit watch or change in a company outlook;
• Movement of the company’s securities from one exchange or quotation system to another, delisting of the company’s securities from an exchange or quotation system, or a notice that a company does not comply with a listing standard;
• Conclusion or notice that security holders no longer should rely on the company’s previously issued financial statements or a related audit report;
• Any material limitation, restriction or prohibition, including the beginning and end of lock-out periods, regarding the company’s employee benefits, retirement and stock ownership plan;
• Unregistered sales of equity securities by the company;
• Material modifications to rights of holders of the company’s securities;
• Earnings releases;
• Changes in earnings guidance; and
• Other materially different information regarding key financial or operations trends from that set forth in periodic reports.
Here's the link: http://idea.sec.gov/about/offices/oi...incdisclos.pdf
(see pp. 9-10).There is absolutely nothing there about the health of a CEO. Period.