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.


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Principal Capital Appreciation Select ETF
YOUR VOTE IS URGENTLY NEEDED!
June 15, 2026
Dear Shareholder,
The Special Meeting of Shareholders of the Principal Capital Appreciation Select ETF (the “Fund”) is scheduled to be held in less than two weeks, on June 25, 2026. We have not received your vote as of this writing.
We kindly ask that you please take 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.
Calls, emails, and mailings will STOP within 3 business days once you vote your shares.
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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.
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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,
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DEANNA Y. PELLACK
COUNSEL AND SECRETARY
PRINCIPAL EXCHANGE-TRADED FUNDS


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