UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D/A

Under the Securities Exchange Act of 1934
(Amendment No. 4)*

HedgePath Pharmaceuticals, Inc.

(Name of Issuer)

Common Stock, $0.0001 par value

(Title of Class of Securities)

42278K 102

(CUSIP Number)

Kate Rintoul

Mayne Pharma Ventures Pty Ltd

Level 1, 99 King Street

Melbourne, Victoria 3000

Australia

61 3 8614 7711

(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)

November 15, 2016

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. ☐

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

^* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

This Amendment No. 4 to Schedule 13D (this “Amendment No. 4”) amends the Schedule 13D originally filed on July 7, 2014 (the “Original Schedule 13D”) by Mayne Pharma Ventures Pty Ltd, an Australian company ACN 168 896 357 (“Mayne Ventures”), Mayne Pharma International Pty Ltd, an Australian company ACN 007 870 984 (“Mayne International”), and Mayne Pharma Group Limited, an Australian company ACN 115 832 963 (“Mayne Group” and, together with Mayne Ventures and Mayne International, collectively, the “Reporting Persons”), as amended by (i) Amendment No. 1 to Schedule 13D filed on May 22, 2015 (“Amendment No. 1”), (ii) Amendment No. 2 to Schedule 13D filed on June 16, 2016 (“Amendment No. 2”) and (ii) Amendment No. 3 to Schedule 13D filed on November 8, 2016 (“Amendment No. 3” and the Original Schedule 13D, as so amended, the “Statement”). Items 3 and 5 of the Statement are hereby amended to the extent hereinafter expressly set forth. Capitalized terms used herein but not defined shall have the meanings attributed to them in the Original Schedule 13D, Amendment No. 1, Amendment No. 2 or Amendment No. 3, as applicable.

Item 3. Source and Amount of Funds or Other Consideration.

The information contained in Item 3 of the Statement is hereby amended and supplemented by adding the following information:

“On November 15, 2016, Mayne Ventures acquired (i) 4,750,569 shares of Common Stock for an aggregate purchase price of $417,099.96 through the exercise of a warrant that was issued by the Issuer to Mayne Ventures on June 24, 2014 (the “2014 Warrant”) at a per share exercise price of $0.0878, (ii) 333 shares of Common Stock for an aggregate purchase price of $24.98 through the exercise of a warrant that was issued by the Issuer to Mayne Ventures on May 15, 2015 (the “2015 Warrant”) at a per share exercise price of $0.075 and (iii) 4,860,000 shares of Common Stock for an aggregate purchase price of $583,200 through the partial exercise of a warrant that was issued by the Issuer to Mayne Ventures on May 25, 2016 (the “2016 Warrant”) at a per share exercise price of $0.12. The source of funds for this acquisition was working capital. As a result of this acquisition, Mayne Ventures now directly holds 197,506,132 shares of Common Stock.”

Item 5. Interest in Securities of the Issuer.

The information contained in Item 5 is hereby amended and restated in its entirety as follows:

“(a) and (b)

Mayne Ventures directly holds 197,506,132 shares of Common Stock. In addition, Mayne Ventures may be deemed to have “beneficial ownership” within the meaning of Rule 13d-3 under the U.S. Securities Exchange Act of 1934, as amended (the “Exchange Act”), of the remaining 23,504,236 shares of Common Stock issuable upon exercise of the 2016 Warrant. Accordingly, Mayne Ventures may be deemed to beneficially own an aggregate of 221,010,368 shares of Common Stock, representing 59.3% of the Issuer’s issued and outstanding Common Stock. This beneficial ownership percentage assumes that there would be 372,386,408 shares of Common Stock issued and outstanding, consisting of 300,438,270 shares of Common Stock reported as issued and outstanding as of October 31, 2016 in the Issuer’s most recent Quarterly Report on Form 10-Q filed on October 31, 2016, plus (i) the 5,500,000 shares of Common Stock acquired by Mayne Ventures upon the partial exercise of the 2014 Warrant on November 4, 2016, (ii) the 33,333,000 shares of Common Stock acquired by Mayne Ventures upon the partial exercise of the 2015 Warrant on November 4, 2016, (iii) the 4,750,569 shares of Common Stock acquired by Mayne Ventures upon the exercise of the 2014 Warrant on November 15, 2016, (iv) the 333 shares of Common Stock acquired by Mayne Ventures upon the exercise of the 2015 Warrant on November 15, 2016, (v) the 4,860,000 shares of Common Stock acquired by Mayne Ventures upon the partial exercise of the 2016 Warrant on November 15, 2016 and (vi) the remaining 23,504,236 shares of Common Stock issuable upon exercise of the 2016 Warrant.

Mayne International holds 100% of the equity securities of Mayne Ventures. Mayne Group holds 100% of the equity securities of Mayne International. Accordingly, Mayne International and Mayne Group may be deemed indirect beneficial owners of the reported securities held by Mayne Ventures. Mayne Ventures, Mayne International and Mayne Group share the power to vote or to direct the vote and dispose or to direct the disposition of the 221,010,368 shares of Common Stock set forth above.

(c)       Except as set forth herein, none of the Reporting Persons has engaged in any transactions in the class of securities reported on that were effected during the past sixty days.

(d)       Not applicable.

(e)       Not applicable.”

Item 7. Material to Be Filed as Exhibits.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date: November 15, 2016

Exhibit 99.1

JOINT FILING AGREEMENT

Each of the undersigned hereby agrees that this Amendment No. 4 to Schedule 13D is being filed with the U.S. Securities and Exchange Commission on behalf of each of the undersigned pursuant to Rule 13d-1(k) under the U.S. Securities Exchange Act of 1934, as amended.

Date: November 15, 2016