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, 2015

Commission File Number                         

Novogen Limited

(Translation of registrant’s name into English)

16-20 Edgeworth David Ave, Hornsby, NSW 2077, 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  þ             Form 40-F   ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):  ¨

Note: Regulation S-T Rule 101(b)(1) only permits the submission in paper of a Form 6-K if submitted solely to provide an attached annual report to security holders.

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):  ¨

Note: Regulation S-T Rule 101(b)(7) only permits the submission in paper of a Form 6-K if submitted to furnish a report or other document that the registrant foreign private issuer must furnish and make public under the laws of the jurisdiction in which the registrant is incorporated, domiciled or legally organized (the registrant’s “home country”), or under the rules of the home country exchange on which the registrant’s securities are traded, as long as the report or other document is not a press release, is not required to be and has not been distributed to the registrant’s security holders, and, if discussing a material event, has already been the subject of a Form 6-K submission or other Commission filing on EDGAR.

Indicate by check mark if the registrant by furnishing the information contained in this form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934. Yes  ¨     No  þ

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

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.

Novogen Limited (Registrant)

Lionel Mateo

Lionel Mateo

Company Secretary

Date 12 June 2015

ASX:NRT   NASDAQ:NVGN   Novogen Ltd (Company)   ABN 37 063 259 754     Capital Structure   Ordinary Shares on issue:   423 M     Board of Directors     Dr Graham Kelly Chairman & Executive Director   Steve Coffey Non-Executive Director   John O’Connor Non-Executive Director   Prof Peter Gunning Non-Executive Director   Ian Phillips Non-Executive Director   Bryce Carmine Non-Executive Director MARKET RELEASE 12 June 2015   Novogen to Present at Bio International Convention Philadelphia 2015   12 June 2015, Sydney, Australia: US-Australian drug discovery company, Novogen Limited (ASX:NRT; NASDAQ:NVGN) today announced today that Novogen Group CEO, Graham Kelly, will be presenting at the Bio International Convention 2015 (BIO) being held at the Pennsylvania Convention Centre, 1101 Arch St, Philadelphia, PA 19107.   Details of the Novogen presentation are as follows:   Presentation Date: Tuesday, June 16   Presentation Time: 9:45 AM   Presentation Room: Theater 4, “The Incredible Helix”   BIO Presentation Track: Oncology   Social Media: #BIO2015   The presentation will provide an update on the Company’s oncology pipeline of three drug candidates, Cantrixil, TRXE-009 and Anisina, and their timetables and clinical strategies. The Company also is scheduled to present to a range of investor conferences being held in Philadelphia in conjunction with BIO, as well as meeting with a wide range of companies seeking business development opportunities with Novogen and its subsidiary, CanTx Inc.   About BIO   BIO is the world’s largest biotechnology gathering, allowing companies to reach influential decision-makers who come to discover new players in the industry, hold meetings and evaluate emerging technologies.   Last year BIO 2014 hosted almost 16,000 industry leaders, including nearly 2,500 CEOs. Attendees came from thousands of organisations including the world’s foremost biotech companies and more than 300 academic institutions including major research laboratories and government agencies from around the world, as well as the industry’s leading consultants and service companies.

About Novogen

Novogen is a public, Australian-US drug development company whose shares trade on both The Australian Securities Exchange (NRT) and NASDAQ (NVGN). The Novogen group includes US-based, CanTx Inc, a joint venture company with Yale University. Novogen has two drug technology platforms yielding drug candidates that are first-in-class with potential application across a broad range of degenerative diseases. In the oncology field, the ultimate objective is to see both drug technologies used in combination as first-line therapy across most forms of cancer, with the objective of preventing tumor recurrence. This objective is based on a strategy of achieving comprehensive destruction of the full hierarchy of cells within a tumor with the super-benzopyran technology platform killing the tumor-initiating cells and the anti-tropomyosin technology, combined with vinca alkaloids, to deliver a potent chemical debulking effect on their daughter cells.

For more information, please visit www.novogen.com

Corporate Contact Dr. Graham Kelly Executive Chairman & CEO Novogen Group Graham.Kelly@novogen.com +61 (0) 2 9472 4100 Media Enquiries Prue Kelly Media Officer Novogen Group Prue.Kelly@novogen.com +61 (0) 2 9472 4101

Forward looking statement

All statements other than statements of historical fact included in this announcement including, without limitation, statements regarding future plans and objectives of Novogen Limited (“Novogen”) are forward-looking statements. When used in this announcement, forward-looking statements can be identified by words such as ‘may’, ‘could’, ‘should’, ‘would’, ‘believes’, ‘estimates’, ‘targets’, ‘expects’ or ‘intends’ and other similar words that involve risks and uncertainties.

Such statements relate to future events and expectations and as such involve known and unknown risks and uncertainties. These risks and uncertainties include, among other things, market conditions, weather risks, economic and political risks.

These statements are based on an assessment of present economic and operating conditions, and on a number of assumptions regarding future events and actions that, as at the date of this announcement, are expected to take place. Such forward-looking statements are not guarantees of future performance and involve known and unknown risks, uncertainties, assumptions and other important factors, many of which are beyond the control of Novogen, its directors and management, which could cause Novogen’s actual results to differ materially from the results expressed or anticipated in these statements.

Novogen cannot and does not give any assurance that the results, performance or achievements expressed or implied by the forward-looking statements contained in this announcement will actually occur and investors are cautioned not to place undue reliance on these forward-looking statements. Actual results, actions, and developments may differ materially from those expressed or implied by those forward-looking statements depending on a variety of factors.

Novogen does not undertake to update or revise forward- looking statements, or to publish prospective financial information in the future, regardless of whether new information, future events or any other factors affect the information contained in this announcement, except where required by applicable law and stock exchange listing requirements.