SEC Form POSASR filed by Jamf Holding Corp.

Registration No. 333-265821

As filed with the Securities and Exchange Commission on January 30, 2026

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

POST-EFFECTIVE AMENDMENT NO. 1 TO

FORM S-3

REGISTRATION STATEMENT NO. 333-265821

UNDER

THE SECURITIES ACT OF 1933

Jamf Holding Corp.

(Exact name of registrant as specified in its charter)

100 Washington Ave S, Suite 900

Minneapolis, MN 55401

(612) 605-6625

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Jeff Lendino

Chief Legal Officer

100 Washington Ave S, Suite 900

Minneapolis, MN 55401

(612) 605-6625

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Approximate date of commencement of proposed sale to the public: Not Applicable. The registrant is filing this post-effective amendment to remove from registration any securities registered hereunder that remain unsold.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box: ¨

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933 (the “Securities Act”), other than securities offered only in connection with dividend or interest reinvestment plans, check the following box: ¨

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. x

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Securities Exchange Act of 1934:

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ¨

EXPLANATORY NOTE

DEREGISTRATION OF SECURITIES

This Post-Effective Amendment No. 1 relates to the Registration Statement on Form S-3 (No. 333-265821) (the “Registration Statement”) of Jamf Holding Corp., a Delaware corporation (the “Registrant”), previously filed with the Securities and Exchange Commission (the “SEC”) on June 24, 2022 to register an indeterminate amount of the Registrant’s common stock, par value $0.001 per share (the “Common Stock”). This Post-Effective Amendment No. 1 is being filed to deregister any and all securities that remain unsold or otherwise unissued under the Registration Statement.

On January 30, 2026, pursuant to the Agreement and Plan of Merger, dated as of October 28, 2025, by and among Jawbreaker Parent, Inc., a Delaware corporation (“Parent”), Jawbreaker Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent (“Merger Sub”), and the Registrant (the “Merger Agreement”), Merger Sub merged with and into the Registrant, with the Registrant surviving such merger as a wholly owned subsidiary of Parent (the “Merger”).

In connection with the foregoing, the Registrant has determined to terminate the offerings of Common Stock under the Registration Statement. Accordingly, the Registrant is filing this Post-Effective Amendment No. 1 to terminate the effectiveness of the Registration Statement, and, in accordance with the undertakings made by the Registrant in the Registration Statement, to remove and withdraw from registration any and all of the Common Stock that remain unsold as of the date hereof. The Registration Statement is hereby amended, as appropriate, to reflect the deregistration of all such Common Stock.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Post-Effective Amendment No. 1 to the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Minneapolis, State of Minnesota, on January 30, 2026.

No other person is required to sign this Post-Effective Amendment No. 1 to the Registration Statement in reliance on Rule 478 under the Securities Act of 1933, as amended.