Additional Proxy Soliciting Materials (Form DEFA14A)

Preliminary Proxy Statement

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

Definitive Proxy Statement

Definitive Additional Materials

Soliciting Material under Rule 14a-12

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.

C/O TABULATOR, P.O. BOX 8016, CARY, NC 27512-9903

Proxy Materials: Notice of Annual Meeting & Proxy

Statement and Annual Report on Form 10-K

Important Notice Regarding the Availability of Proxy Materials for the Shareholders Meeting to be held on May 27, 2026 for Shareholders of record as of April 2, 2026.

Tenet Healthcare Corporation

Annual Meeting of Shareholders

Wednesday, May 27, 2026 at 9:00 AM, Central Time

Annual Meeting to be held live via the Internet - please visit www.proxydocs.com/THC for more details.

You must register to attend, participate and/or vote at the annual meeting at

www.proxydocs.com/THC.

For a convenient way to view proxy materials, VOTE and obtain directions to attend the meeting go to www.proxydocs.com/THC.

To vote your proxy while visiting this site, you will need the 12 digit control number in the box below.

This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. This is not a ballot. You cannot use this notice to vote your shares. We encourage you to access and review all of the important information contained in the proxy materials before voting.

To order paper materials, use one of the following methods:

Internet:

www.investorelections.com/THC

Call:

1-866-648-8133

Under U.S. Securities and Exchange Commission rules, proxy materials do not have to be delivered in paper. Proxy materials can be distributed by making them available on the Internet.

If you want to receive a paper or e-mail copy of the proxy materials, you must request one. There is no charge to you for requesting a copy. In order to receive a paper package in time for this year's meeting, you must make this request on or before May 22, 2026.

Email:

[email protected]

* If requesting materials by e-mail, please send a blank e-mail with the 12 digit control number (located below) in the subject line. No other requests, instructions OR inquiries should be included with your e-mail requesting materials.

Have the 12 digit control number located in the box above available when you access the website and follow the instructions.

Tenet Healthcare Corporation Annual Meeting of Shareholders