SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 11)*

Sandridge Energy, Inc.

(Name of Issuer)

common stock, par value $0.001 per share

(Title of Class of Securities)

80007P869

(CUSIP Number)

Jesse Lynn, Esq.

Icahn Capital LP

767 Fifth Avenue, 47^th Floor

New York, New York 10153

(212) 702-4300

(Name, Address and Telephone Number of Person Authorized to

Receive Notices and Communications)

May 25, 2018

(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 Section 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 Rule 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).

SCHEDULE 13D

The Schedule 13D filed with the Securities and Exchange Commission on November 22, 2017, as previously amended (the "Schedule 13D"), by High River Limited Partnership, Hopper Investments LLC, Barberry Corp., Icahn Partners Master Fund LP, Icahn Offshore LP, Icahn Partners LP, Icahn Onshore LP, Icahn Capital LP, IPH GP LLC, Icahn Enterprises Holdings L.P., Icahn Enterprises G.P. Inc., Beckton Corp. and Carl C. Icahn (collectively, the "Reporting Persons"), with respect to the shares of common stock, par value $0.001 per share ("Shares"), of Sandridge Energy, Inc. (the "Issuer"), is hereby further amended to furnish the additional information set forth herein. All capitalized terms contained herein but not otherwise defined shall have the meanings ascribed to such terms in the Schedule 13D.

Item 4 of the Schedule 13D is hereby amended by adding the following paragraph at the end thereof:

Item 4 of the Schedule 13D is hereby amended to add the following at the end thereof:

On May 25, 2018, the Reporting Persons released a presentation regarding the Issuer, a copy of which is filed herewith as an exhibit and incorporated herein by reference.

CARL C. ICAHN AND THE OTHER PARTICIPANTS IN SUCH PROXY SOLICITATION (TOGETHER, THE "PARTICIPANTS") FILED A DEFINTIVE PROXY STATEMENT AND ACCOMPANYING GOLD PROXY CARD WITH THE SECURITIES AND EXCHANGE COMMISSION (THE "SEC") TO BE USED TO SOLICIT PROXIES IN CONNECTION WITH THE 2018 ANNUAL MEETING OF STOCKHOLDERS OF SANDRIDGE ENERGY, INC (THE "ANNUAL MEETING"). SECURITY HOLDERS ARE ADVISED TO READ THE PROXY STATEMENT AND OTHER DOCUMENTS RELATED TO THE SOLICITATION OF PROXIES BY THE PARTICIPANTS IN CONNECTION WITH THE ANNUAL MEETING BECAUSE THEY CONTAIN IMPORTANT INFORMATION, INCLUDING INFORMATION RELATING TO THE PARTICIPANTS IN SUCH PROXY SOLICITATION. THESE MATERIALS AND OTHER MATERIALS FILED BY THE PARTICIPANTS WITH THE SEC ARE AVAILABLE AT NO CHARGE AT THE SEC'S WEBSITE AT HTTP://WWW.SEC.GOV. INFORMATION RELATING TO THE PARTICIPANTS IN SUCH PROXY SOLICITATION IS CONTAINED IN THE PROXY STATEMENT. EXCEPT AS OTHERWISE DISCLOSED IN THE PROXY STATEMENT, THE PARTICIPANTS HAVE NO INTEREST IN SANDRIDGE ENERGY, INC. OTHER THAN THROUGH THE BENEFICIAL OWNERSHIP OF SHARES OF COMMON STOCK, PAR VALUE $0.001 PER SHARE, OF SANDRIDGE ENERGY, INC.

Item 7. Material to be Filed as Exhibits

SIGNATURE

After reasonable inquiry and to the best of each of the undersigned knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Dated: May 25, 2018

ICAHN PARTNERS MASTER FUND LP

ICAHN OFFSHORE LP

ICAHN PARTNERS LP

ICAHN ONSHORE LP

BECKTON CORP.

HOPPER INVESTMENTS LLC

BARBERRY CORP.

HIGH RIVER LIMITED PARTNERSHIP

By: Hopper Investments LLC, general partner

By: Barberry Corp.

Name: Edward E. Mattner

Title: Authorized Signatory

ICAHN CAPITAL LP

By: IPH GP LLC, its general partner

By: Icahn Enterprises Holdings L.P., its sole member

By: Icahn Enterprises G.P. Inc., its general partner

IPH GP LLC

By: Icahn Enterprises Holdings L.P., its sole member

By: Icahn Enterprises G.P. Inc., its general partner

ICAHN ENTERPRISES HOLDINGS L.P.

By: Icahn Enterprises G.P. Inc., its general partner

ICAHN ENTERPRISES G.P. INC.

Name: SungHwan Cho

Title: Chief Financial Officer

CARL C. ICAHN

[Signature Page of Amendment No. 11 to Schedule 13D – Sandridge Energy, Inc.]