THE ALGER FUNDS

THE ALGER INSTITUTIONAL FUNDS

THE ALGER FUNDS II

ALGER GLOBAL FOCUS FUND

April 12, 2019 Supplement to the Summary

Prospectus dated March 1, 2019, as supplemented to date

The section titled “Optional Internet Availability of Alger Shareholder Reports” in the summary prospectus is hereby deleted and replaced with the following:

Optional Internet Availability of Alger Shareholder Reports

Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s shareholder reports will no longer be sent by mail, unless you specifically request paper copies of the reports from the Fund or from your financial intermediary. Instead, the reports will be made available on a website, and you will be notified by mail each time a report is posted and provided with a website link to access the report.

If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically by signing up for paperless delivery at www.icsdelivery.com/alger. If you own these shares through a financial intermediary, contact your financial intermediary.

You may elect to receive all future reports in paper free of charge. You can inform the Fund or financial intermediary that you wish to continue receiving paper copies of your shareholder reports by contacting us at 1-866-345-5954 or fundreports.com. If you own these shares through a financial intermediary contact your financial intermediary to elect to continue to receive paper copies of your shareholder reports. Your election to receive reports in paper will apply to all funds held with the Alger Fund Complex.