Astrana Health, Inc.

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

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Filed by a Party other than the Registrant☐

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☐ 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 Pursuant to §240.14a-12

Astrana Health, Inc.

(Name of Registrant as Specified in Its Charter)

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

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NOTICE OF 2026 ANNUAL MEETING OF STOCKHOLDERS

NOTICE IS HEREBY GIVEN for the 2026 Annual Meeting of Stockholders (the “2026 Annual Meeting”) of Astrana Health, Inc. (the “Company,” “we,” “our,” or “us”).

Date: Wednesday, June 10, 2026 at 10:00 a.m., Pacific Time

Location: 1668 S. Garfield Avenue, 3rd Floor Conference Room, Alhambra, California 91801

Items of business: To consider and vote upon the following:

These matters are described more fully in the proxy statement accompanying this notice.

Record date: The Board has fixed the close of business on April 14, 2026 as the record date (the “Record Date”) for determining those stockholders who will be entitled to notice of and to vote at the 2026 Annual Meeting. Only stockholders of record at the close of business on the Record Date will be entitled to notice of, and to vote at, the meeting.

Voting: We urge you to submit your proxy promptly by Internet, telephone, or mail, even if your shares were sold after the Record Date. If your broker, bank, or other nominee is the holder of record of your shares (i.e., your shares are held in “street name”), you will receive voting instructions from such broker, bank, or other nominee. You must follow these instructions in order for your shares to be voted.

Please read the accompanying proxy materials carefully. Your vote is important, and we appreciate your cooperation in considering and acting on the matters presented. Even if you plan to attend the 2026 Annual Meeting, we recommend that you vote prior to the meeting to ensure that your shares will be represented.

By Order of the Board of Directors,

Kenneth Sim, M.D.

Executive Chairman

April 17, 2026

Alhambra, California

IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE ANNUAL MEETING OF STOCKHOLDERS TO BE HELD ON JUNE 10, 2026:

The Notice of Annual Meeting, Proxy Statement, and Annual Report to Stockholders are available atwww.proxyvote.com

ASTRANA HEALTH, INC.

TABLE OF CONTENTS

This document includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements involve risks and uncertainties and are based on current expectations, are inherently uncertain, and are subject to changing assumptions. The forward-looking statements include, but are not limited to, statements relating to our ability to realize the anticipated benefits of our completed acquisition of certain businesses and assets relating to Prospect Health Systems (“Prospect Health”). Actual results could differ materially from any future results expressed or implied by the forward-looking statements for a variety of reasons, including due to the risks and uncertainties that are discussed in our most recently filed periodic reports on Form 10-K and Form 10-Q and subsequent filings. We do not undertake any obligation to update our forward-looking statements to reflect future events or circumstances, except as otherwise required by law. No assurance can be given that any plan, initiative, projection, goal, target, commitment, expectation, or prospect set forth in this proxy statement can or will be achieved. Inclusion of information in this proxy statement is not an indication that the subject or information is material to our business or operating results. In addition, the information on or accessible through, including any reports available on, our website is not, and shall not be deemed to be, a part of this proxy statement or incorporated by reference into this or any other filing we make with the SEC. Any reference to our website throughout this proxy statement is intended to be an inactive textual reference only.

2026 PROXY STATEMENT