Twitter filed a Form 8-K with the SEC this morning. https://www.sec.gov/Archives/edgar/data/1418091/000156459015008360/0001564590-15-008360-index.htm https://w

Twitter filed a Form 8-K with the SEC this morning. https://www.sec.gov/Archives/edgar/data/1418091/000156459015008360/0001564590-15-008360-index.htm https://www.sec.gov/Archives/edgar/data/1418091/000156459015... I'm not a securities lawyer, but I think the basic idea is that news about the layoffs (and the associated costs) was deemed to be material information, so under reg FD it has to be released to all investors simultaneously.