SUMMARY

The State of Wisconsin Investment Board (SWIB) invests assets for the Wisconsin Retirement System that are held in the Core Retirement Investment Trust Fund and Variable Retirement Investment Trust Fund. Together, these funds are known as the Retirement Funds. We provided unmodified opinions on the financial statements of the Retirement Funds for the year ended December 31, 2017. The financial statements and our auditor's opinions are published separately in SWIB’s 2017 Retirement Funds Annual Report.