Immuron (NASDAQ: IMRN) now has 322.8M ordinary shares on issue

Rhea-AI Filing Summary

Immuron Limited reports that 3,805,528 IMC ordinary fully paid shares have ceased on the ASX as of 29/6/2026. The company paid consideration of AUD 0 per security for this cessation.

After this change, Immuron has 322,848,081 IMC ordinary fully paid shares on issue, along with 3,767,492 IMCAE performance rights and 8,000,000 IMCAI options expiring on various dates at various prices. These figures will be used by the ASX to calculate the company’s market capitalization.

Key Figures

Securities ceased: 3,805,528 shares Consideration per ceased share: AUD 0 Ordinary shares on issue: 322,848,081 shares +3 more

6 metrics

Securities ceased 3,805,528 shares IMC ordinary fully paid shares ceased on 29/6/2026

Consideration per ceased share AUD 0 Consideration amount per security for cessation

Ordinary shares on issue 322,848,081 shares IMC ordinary fully paid shares after cessation

Performance rights on issue 3,767,492 rights IMCAE performance rights outstanding

Options on issue 8,000,000 options IMCAI options expiring various dates at various prices

Cessation date 29/6/2026 Date the 3,805,528 IMC ordinary shares ceased

Key Terms

Notification of cessation of securities, ORDINARY FULLY PAID, issued capital, performance rights, +1 more

5 terms

Notification of cessation of securities regulatory

"Exhibit 99.1 | Notification of cessation of securities - IMC"

ORDINARY FULLY PAID financial

"IMC | ORDINARY FULLY PAID | 3,805,528"

issued capital financial

"We (the entity named above) provide the following information about our issued capital."

performance rights financial

"IMCAE PERFORMANCE RIGHTS | 3,767,492"

Performance rights are conditional awards that give employees or executives the promise of receiving company shares or cash only if the business meets specific targets or survives for a set period. They work like a bonus you only get when certain goals are hit, so they matter to investors because they can increase the number of shares outstanding (dilution), signal management’s incentives and confidence in future results, and affect per-share earnings and valuation.

options expiring various dates financial

"IMCAI OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES | 8,000,000"

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Form 6-K: How Foreign Companies Report to the SEC →

Available on EDGAR 06/29/2026 - 08:00 AM Accepted by SEC EDGAR 06/29/2026 - 08:00 AM Learn about SEC filing dates

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the Month of June 2026

Commission File Number: 001-38104

IMMURON LIMITED

(Name of Registrant)

Level 3, 62 Lygon Street, Carlton South, Victoria, 3053, Australia

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒       Form 40-F ☐

Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ☐       No ☒

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-

IMMURON LIMITED

EXPLANATORY NOTE

Immuron Limited (the “Company”) published an announcement (the “Public Notices”) to the Australian Securities Exchange on June 29, 2026 titled:

- Notification of cessation of securities - IMC

A copy of the Public Notice is attached as an exhibit to this report on Form 6-K.

This report on Form 6-K (including the exhibit hereto) shall not be deemed to be “filed” for purposes of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and shall not be incorporated by reference into any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

1

EXHIBITS

Exhibit Number		Description
99.1		Notification of cessation of securities - IMC

2

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	IMMURON LIMITED
Date: June 29, 2026	By:	/s/ Olga Smejkalova
		Olga Smejkalova
		Company Secretary

3

Exhibit 99.1

Appendix 3H - Notification of cessation of securities

Announcement Summary

Entity name

IMMURON LIMITED

Announcement Type

New announcement

Date of this announcement

Monday June 29, 2026

Details of +securities that have ceased

ASX +security code		Security description		Number of +securities that have ceased				The +securities have ceased due to		Date of cessation
IMC		ORDINARY FULLY PAID			3,805,528			Other		29/06/2026

Refer to next page for full details of the announcement

Appendix 3H - Notification of cessation of securities 1 / 4

Appendix 3H - Notification of cessation of securities

Part 1 - Announcement Details

1.1 Name of +Entity

IMMURON LIMITED

We (the entity named above) provide the following information about our issued capital.

	1.2 Registered Number Type	Registration Number
	ACN	063114045

1.3 ASX issuer code

IMC

1.4 The announcement is

New announcement

1.5 Date of this announcement

29/6/2026

Appendix 3H - Notification of cessation of securities 2 / 4

Appendix 3H - Notification of cessation of securities

Part 2 - Details of +equity securities or +debt securities that have ceased

ASX +Security Code and Description

IMC : ORDINARY FULLY PAID

Quoted +equity securities or +debt securities that have ceased
Number of securities that have ceased

3,805,528

Reason for cessation

Other

Please provide additional details

Shares are being cancelled pursuant to the buy-back of unmarketable parcels.

	Date of cessation		Is the entity paying any consideration for the cessation?
	29/6/2026		Yes

	In what currency is the consideration being paid?		Consideration amount per +security paid by the entity for the cessation
	AUD - Australian Dollar		AUD 0.032000000000

Any other information the entity wishes to notify to ASX about the cessation?

Shares are being cancelled pursuant to the buy-back of unmarketable parcels, as announced on the ASX on 23 June 2026. The announcement can be found here: https://announcements.asx.com.au/asxpdf/20260623/pdf/070wzn623b8hhf.pdf

Appendix 3H - Notification of cessation of securities 3 / 4

Appendix 3H - Notification of cessation of securities

Part 3 - Issued capital following changes

Following the cessation of the +securities the subject of this notification, the issued capital of the entity will comprise:

The figures in parts 3.1 and 3.2 below are automatically generated and may not reflect the entity’s current issued capital if other Appendix 2A, Appendix 3G or Appendix 3H forms are currently with ASX for processing.

3.1 Quoted +equity securities and +debt securities (total number of each +class of +securities quoted on ASX)

ASX +security code and description		Total number of +securities on issue
IMC : ORDINARY FULLY PAID			322,848,081

3.2 Unquoted +equity securities (total number of each +class of +equity securities issued but not quoted on ASX)

ASX +security code and description		Total number of +securities on issue
IMCAE : PERFORMANCE RIGHTS			3,767,492
IMCAI : OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES			8,000,000

Note: the figures stated in the tables above are used to calculate the total market capitalisation of the entity published by ASX from time to time. The table will not include those classes of +securities that have ceased or lapsed in their entirety in ASX records before the announcement date described in Q1.5, even if the entity has advised ASX of a change to that class of +security in Part 2 of this form.

Appendix 3H - Notification of cessation of securities 4 / 4

FAQ

What did Immuron Limited (IMRN) announce in this Form 6-K?

Immuron Limited reported the cessation of 3,805,528 IMC ordinary fully paid shares on the ASX. The change updates its issued capital structure and will be used by the ASX when calculating the company’s market capitalization going forward.

How many Immuron (IMRN) ordinary shares remain on issue after the cessation?

Following the cessation, Immuron has 322,848,081 IMC ordinary fully paid shares on issue. This total reflects the updated share count that the ASX will use for market capitalization calculations after removing the 3,805,528 ceased securities.

Did Immuron (IMRN) pay consideration for the ceased securities?

Yes. Immuron indicated it is paying consideration in Australian dollars, with a consideration amount per security of AUD 0. This means the 3,805,528 ceased IMC ordinary fully paid shares did not involve a cash outlay per share by the company.

When did Immuron’s 3,805,528 IMC ordinary shares cease on the ASX?

The 3,805,528 IMC ordinary fully paid shares ceased on the ASX on 29 June 2026. This cessation date is the reference point for the updated issued capital figures that the ASX uses in its market capitalization calculations for Immuron.

What other Immuron (IMRN) securities remain on issue besides ordinary shares?

In addition to 322,848,081 IMC ordinary fully paid shares, Immuron has 3,767,492 IMCAE performance rights and 8,000,000 IMCAI options with various expiry dates and exercise prices. These additional securities form part of the company’s overall capital structure.

Does this Immuron (IMRN) update affect all IMC securities on the ASX?

No. The notification specifically covers the cessation of 3,805,528 IMC ordinary fully paid shares. After this event, 322,848,081 IMC ordinary shares, 3,767,492 performance rights and 8,000,000 options remain on issue according to the figures provided to the ASX.

Filing Exhibits & Attachments

1 document

Press Releases

• EX-99.1 NOTIFICATION OF CESSATION OF SECURITIES - IMC 26.7 KB