Form 424B3 Anteris Technologies

Filed pursuant to Rule 424(b)(3)

Registration No. 333-291821

Prospectus Supplement No. 8

(To Prospectus dated March 13, 2026)

This prospectus supplement updates, amends and supplements the prospectus, dated March 13, 2026 (the “Prospectus”), which forms part of our Registration Statement on Form S-1 (Registration No. 333-291821) relating to up to 9,103,796 shares of our common stock, par value $0.0001 per share (“Common Stock”), which may be offered for sale by the selling stockholders identified under the heading “Selling Stockholders” in the Prospectus. This prospectus supplement is being filed to update, amend and supplement the information contained in the Prospectus with information contained in our Current Report on Form 8-K, which was filed with the Securities and Exchange Commission (the “SEC”) on September 23, 2026 (the “Current Report”).  Accordingly, we have attached the Current Report to this prospectus supplement.

 

This prospectus supplement is not complete without the Prospectus. This prospectus supplement should be read in conjunction with the Prospectus, which is to be delivered with this prospectus supplement, and is qualified by reference thereto, except to the extent that the information in this prospectus supplement updates or supersedes the information contained in the Prospectus. Please keep this prospectus supplement with your Prospectus for future reference.

Investing in our securities involves a high degree of risk. See the section titled “Risk Factors” in the Prospectus and in the documents incorporated by reference in the Prospectus.

Neither the SEC nor any state securities commission has approved or disapproved of the securities to be offered pursuant to the Prospectus or this prospectus supplement or determined if the Prospectus or this prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus supplement is September 24, 2026.

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Delaware	001-42437	99-1407174
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

Toowong Tower, Level 3, Suite 302 9 Sherwood Road Toowong, QLD Australia		4066
(Address of Principal Executive Offices)		(Zip Code)

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Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, par value $0.0001 per share		AVR		The Nasdaq Global Market

 

Item 9.01.

Financial Statements and Exhibits.

Exhibit No.		Description
10.1		First Amendment to Supply & Quality Agreement, between Anteris Aus Operations Pty Ltd and Harvey Industries Group Pty Ltd, dated September 22, 2026.
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

	Anteris Technologies Global Corp.
Date: September 23, 2026	By:	/s/ Wayne Paterson
		Name: Wayne Paterson
		Title: Vice Chairman and Chief Executive Officer

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REGISTERED OFFICE	Anteris Aus Operations Pty Ltd	26 Harris Road, Malaga, Western
Toowong Tower, Level 3, Suite 302		Australia, 6090
9 Sherwood Road
Toowong, QLD 4066		T: +61 1300 550 310
Australia	ACN: 095 710 339	[email protected]
	BRISBANE | MINNEAPOLIS | GENEVA | MALAGA	anteristech.com

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