DFAN14A 1 dfan14a09076074_06092026.htm

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

(Amendment No. )

Filed by the Registrant ☐

Filed by a Party other than the Registrant ☒

Check the appropriate box:

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Preliminary Proxy Statement

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

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Definitive Proxy Statement

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Definitive Additional Materials

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Soliciting Material Under § 240.14a-12

SEER, INC.

(Name of Registrant as Specified In Its Charter)

BRADLEY L. RADOFF

THE RADOFF FAMILY FOUNDATION

JEC II ASSOCIATES, LLC

THE MOS TRUST

MOS PTC, LLC

MICHAEL TOROK

HOWARD H. BERMAN

JOSHUA S. HOROWITZ

LUIS E. RINALDINI

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

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

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No fee required

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Fee paid previously with preliminary materials

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

Bradley L. Radoff, Michael Torok and the other participants named herein (collectively, the “Radoff-JEC Group”) have filed a definitive proxy statement and accompanying WHITE universal proxy card with the Securities and Exchange Commission to be used to solicit votes for the election of its slate of highly qualified director nominees at the 2026 annual meeting of stockholders of Seer, Inc., a Delaware corporation (the “Company”).

On the evening of June 8, 2026, the Radoff-JEC Group mailed an open letter and information sheet to stockholders of the Company, which are included below and are also attached hereto as Exhibit 1 and incorporated herein by reference.

SEC Form DFAN14A filed by Seer Inc.