According to a recent report, between 2013 and 2015 ...

... the percentages of employers offering at least one self-insured health plan have changed as follows:

• small employers with fewer than 100 workers increased 7% (from 13.3% to 14.2%)
• midsized employers with 100 to 499 workers increased 19% (from 25.3% to 30.1%)
• large employers with more than 500 workers decreased 4% (from 83.9% to 80.4%)

Source: "Self-Insured Growing in Small, Medium-Sized Firms," Employee Benefit Reseearch Institute News Release, July 28, 2016, https://www.ebri.org/pdf/PR1166.Self-Ins.27July16.pdf