P&I 1,000

How the data were compiled

Pensions & Investments gathered information for this report, published annually since 1974, in three steps.

Questionnaires were sent to more than 1,300 fund sponsors in P&I's database. The largest 1,000 were identified from completed questionnaires, follow-up phone calls and emails, and database searches.

Data for sponsoring entities that did not respond were culled from published annual or quarterly reports and Form 5500s filed with the Department of Labor. Morningstar Inc. provided source materials used as references to gather the most recent historical asset data for certain plans.

P&I's survey generally covers the 12 months ended Sept. 30, 2017. In cases where no information was available from the fund, or the data were older than June 30, 2017, P&I calculated estimates to Sept. 30.

Dollar amounts generally are rounded to the nearest million; in certain tables and charts, they are rounded to billions. The aggregate asset mixes represent the weighted averages of all reported allocations for the respective funds.

All data in this special report are 2018 Crain Communications Inc. Reproduction without permission is prohibited.