Retirement Class HCBRX
Institutional Class HACBX
Harbor Core Bond Fund
Supplement to Summary Prospectus dated March 1, 2021
December 6, 2021
Effective December 1, 2021 (the “Effective Date”), Harbor Capital Advisors, Inc. (the “Adviser”), the investment adviser to Harbor Core Bond Fund (the “Fund”), has reduced its management fee to 0.23% annually as a percentage of the Fund’s average net assets. In addition, as of the Effective Date, the Adviser has contractually agreed to limit the Fund’s operating expenses, excluding interest expense (if any), to 0.26% and 0.34% for the Retirement Class and Institutional Class, respectively, through February 28, 2023. This expense limitation agreement replaces the prior expense limitation agreement as of the Effective Date.
As of the Effective Date, the following replaces the information in the “Fees and Expenses of the Fund” section on page 1 of the Summary Prospectus:
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
 
Retirement
Class
Institutional
Class
Management Fees1
0.23%
0.23%
Distribution and Service (12b-1) Fees
None
None
Other Expenses
0.09%
0.17%
Total Annual Fund Operating Expenses
0.32%
0.40%
Expense Reimbursement2
(0.06)%
(0.06)%
Total Annual Fund Operating Expenses After Expense Reimbursement2
0.26%
0.34%
1Restated to reflect current fees.
2The Adviser has contractually agreed to limit the Fund’s operating expenses, excluding interest expense (if any), to 0.26% and 0.34% for the Retirement Class and Institutional Class, respectively, through February 28, 2023. Only the Fund’s Board of Trustees may modify or terminate this agreement.
Expense Example
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, under these assumptions, your costs would be:
 
One
Year
Three
Years
Five
Years
Ten
Years
Retirement
$27
$97
$174
$400
Institutional
$35
$122
$218
$499
Investors Should Retain This Supplement For Future Reference
S1221.SP.CB