June 15 : iRhythm Holdings on Monday reported unauthorized activity involving data maintained on some third-party applications last week, but said it has not identified any impact on products, patient safety or medical device systems from the cyber attack. Here are some details from the company's filing: • The medtech firm said it identified unauthorized activity on June 8 and launched an investigation with external cybersecurity experts. • The company added that on June 9 it received a payment