UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 6)

Osage Exploration and Development, Inc.

(Name of Issuer)

Common Stock, Par Value $0.0001 Per Share

(Title of Class of Securities)

68771L107

(CUSIP Number)

James W. Larimore, Esq.

20 North Broadway, Suite 1800

Oklahoma City, Oklahoma 73102

(405) 235-7700

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

May 17, 2013

(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.  ¨

This Amendment No. 6 (this “Sixth Amendment”) to Schedule 13D is filed by E. Peter Hoffman, Jr. (the “Reporting Person”) with respect to the Reporting Person’s beneficial ownership of shares of common stock, par value $.0001 per share (the “Common Stock”), of Osage Exploration and Development, Inc., a Delaware corporation (the “Issuer”). This Sixth Amendment amends the initial statement on Schedule 13D filed by the Reporting Person on July 3, 2008, as previously amended by Amendment Nos. 1, 2, 3, 4 and 5 to Schedule 13D filed by the Reporting Person on April 8, 2011, December 29, 2011, July 26, 2012, November 14, 2012, and April 26, 2013, respectively (collectively, the “Prior 13D”). Unless otherwise indicated, all capitalized terms used but not defined herein shall have the same meaning ascribed to them in the Prior 13D. Except as indicated herein, the information set forth in the Prior 13D remains unchanged.

The information set forth in the Prior 13D with respect to this Item has not changed as of the date of this Sixth Amendment.

The information set forth in the Prior 13D with respect to this Item has not changed as of the date of this Sixth Amendment.

The information set forth in the Prior 13D with respect to this Item has not changed as of the date of this Sixth Amendment.

The information set forth in the Prior 13D with respect to this Item has not changed as of the date of this Sixth Amendment.

(a) As of the date of this Sixth Amendment, the Reporting Person is the beneficial owner of 2,139,119 shares of Common Stock, which constitutes 4.3% of the outstanding shares of Common Stock. The beneficial ownership percentage of the Reporting Person is calculated based on 49,854,675 shares of Common Stock outstanding as of August 9, 2013, as reported in the Issuer’s Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 14, 2013.

(b) The Reporting Person has sole voting and dispositive power with respect to all of the 2,139,119 shares of Common Stock beneficially owned by him.

(c) In a series of sale transactions on the open market from June 20, 2013, through August 18, 2013, the Reporting Person sold a total of 172,013 shares of Common Stock at prices ranging from $0.94 to $1.20 per share.

(e) The Reporting Person ceased to be the beneficial owner of more than five percent of the Common Stock on May 17, 2013.

The information set forth in the Prior 13D with respect to this Item has not changed as of the date of this Sixth Amendment.

None.

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.