Additional Proxy Soliciting Materials (Form DEFA14A)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_____________________________

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of

The Securities Exchange Act of 1934

(Amendment No. )

_____________________________

Filed by the Registrant [X]

Filed by a Party other than the Registrant [ ]

Check the appropriate box:

[ ] Preliminary Proxy Statement

[ ] Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

[ ] Definitive Proxy Statement

[X] Definitive Additional Materials

[ ] Soliciting Material Pursuant to Section 240.14a-12

PRINCIPAL EXCHANGE-TRADED FUNDS

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all the boxes that apply):

[X] No fee required.

[ ] Fee paid previously with preliminary materials.

[ ] Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

Principal Capital Appreciation Select ETF

May 12, 2026

DEAR SHAREHOLDER,

As a shareholder in the Principal Capital Appreciation Select ETF (the "Fund"), you recently received a proxy communication via e-mail or in the mail in connection with the Special Meeting of Shareholders to be held on June 25, 2026.

Please join your fellow shareholders by taking a few minutes to sign, date and mail the enclosed card in the prepaid envelope or follow the instructions below to vote by telephone or internet. As of the date of this letter, we have received strong support in favor of the proposal from shareholders who have already voted.

			Vote by Phone by calling 1-888-569-8137 and speaking with a proxy voting specialist today. Our representatives are available weekdays from 10 a.m. to 11 p.m. Eastern time. You may also call the toll-free number on the enclosed card and follow the prompts.
			Vote by Internet by visiting the internet address on the enclosed card and following the instructions.

If you have any questions or need assistance in voting, please contact our proxy solicitor, Sodali Fund Solutions ("SFS") at 1-888-569-8137. Please note that an SFS representative may call you to assist in voting.

Thank you,

DEANNA Y. PELLACK

COUNSEL AND SECRETARY

PRINCIPAL EXCHANGE TRADED FUNDS