Filed pursuant to Rule 424(b)(3)

Registration Statement No. 333-160688

Prospectus Supplement No. 3

(To Prospectus dated September 29, 2009)

55,544,300 shares

TransAtlantic Petroleum Ltd.

Common Shares

This Prospectus Supplement No. 3 supplements and amends the prospectus dated September 29, 2009, as supplemented by Prospectus Supplement No. 1 dated October 1, 2009 and Prospectus Supplement No. 2 dated October 8, 2009, collectively referred to herein as the Prospectus.

This prospectus supplement is being filed to include the information set forth in our Current Report on Form 8-K dated October 20, 2009 and filed with the Securities and Exchange Commission on October 21, 2009, which is attached hereto.

This prospectus supplement should be read in conjunction with the Prospectus, which is to be delivered with this prospectus supplement. This prospectus supplement is qualified by reference to the Prospectus, except to the extent that the information in this prospectus supplement updates or supersedes the information contained in the Prospectus, including any supplements and amendments thereto.

This prospectus supplement is not complete without, and may not be delivered or utilized except in connection with, the Prospectus, including any supplements and amendments thereto.

There are significant risks associated with an investment in our common shares. These risks are described under the caption “Risk Factors” beginning on page 5 of the Prospectus, as the same may be updated in prospectus supplements.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the accompanying Prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus supplement is October 21, 2009.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 20, 2009

TRANSATLANTIC PETROLEUM LTD.

(Exact name of registrant as specified in its charter)

Bermuda	000-31643	None
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

5910 N. Central Expressway, Suite 1755 Dallas, Texas	75206
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (214) 220-4323

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01 Other Events.

On October 20, 2009, TransAtlantic Petroleum Ltd. (the “Company”) issued a press release announcing that its ticker symbol on the OTC Bulletin Board has changed from “TAPFF” to “TATPF”. The new symbol has been issued effective October 19, 2009 as a result of the Company’s name change from TransAtlantic Petroleum Corp. to TransAtlantic Petroleum Ltd. and the issuance of a new CUSIP number for the Company’s common shares, which occurred in connection with the Company’s continuance to Bermuda on October 1, 2009. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits.

Exhibit No.	Description of Exhibit
99.1	Press release issued by the Company on October 20, 2009.

SIGNATURES

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 hereunto duly authorized.

Date:	October 21, 2009
		TRANSATLANTIC PETROLEUM LTD.
		By:	/s/    JEFFREY S. MECOM
			Jeffrey S. Mecom
			Vice President and Corporate Secretary

EXHIBIT INDEX

Exhibit No.	Description of Exhibit
99.1	Press release issued by the Company on October 20, 2009.

TransAtlantic Petroleum Ltd.

Announces Change in OTC Bulletin Board Ticker Symbol

FOR IMMEDIATE RELEASE

Dallas, Texas (October 20, 2009) – TransAtlantic Petroleum Ltd. (TSX: TNP) (OTCBB: TATPF.OB) today announced that trading of the Company’s common shares on the OTC Bulletin Board has commenced under a new ticker symbol, “TATPF.” The new symbol has been issued as a result of the Company’s name change from TransAtlantic Petroleum Corp. to TransAtlantic Petroleum Ltd. and the issuance of a new CUSIP number for the Company’s common shares, which occurred in connection with the Company’s continuance to Bermuda on October 1, 2009. The Company’s new CUSIP number is G89982105. Holders of the Company’s common shares do not need to take any action as a result of the recent changes.

About TransAtlantic

TransAtlantic Petroleum Ltd. is a vertically integrated, international energy company engaged in the acquisition, development, exploration, and production of crude oil and natural gas. The Company holds interests in developed and undeveloped oil and gas properties in Turkey, Morocco, Romania, and California. Additional information about the Company may be obtained by visiting the Company’s website, www.transatlanticpetroleum.com.

(NO STOCK EXCHANGE, SECURITIES COMMISSION OR OTHER REGULATORY AUTHORITY HAS APPROVED OR DISAPPROVED THE INFORMATION CONTAINED HEREIN.)

Contact:

Matt McCann, CEO

Scott C. Larsen, President

Phone:	(214) 220-4323
Internet:	http://www.transatlanticpetroleum.com
Address:	5910 N. Central Expressway
	Suite 1755
	Dallas, Texas 75206

This news release contains statements regarding expectations, plans, goals, objectives, assumptions or information about future events, conditions, results of operations or performance that may constitute forward-looking statements or information under applicable securities legislation. Such forward-looking statements or information are based on a number of assumptions which may prove to be incorrect. In addition to other assumptions identified in this news release, assumptions have been made regarding, among other things, the ability of the Company to continue to develop and exploit attractive foreign initiatives.

Although the Company believes that the expectations reflected in such forward-looking statements or information are reasonable, undue reliance should not be placed on forward-looking statements because the Company can give no assurance that such expectations will prove to be correct. Forward-looking statements or information are based on current expectations, estimates and projections that involve a number of risks and uncertainties which could cause actual results to differ materially from those anticipated by the Company and described in the forward-looking statements or information. These risks and uncertainties include but are not limited to the continuing ability of the Company to operate effectively internationally, reliance on current oil and gas laws, rules and regulations, volatility of oil and gas prices, fluctuations in currency and interest rates, imprecision of resource estimates, the results of exploration, development and drilling, imprecision in estimates of future production capacity, changes in environmental and other regulations or the interpretation of such regulations, the ability to obtain necessary regulatory approvals, weather and general economic and business conditions.

The forward-looking statements or information contained in this news release are made as of the date hereof and the Company undertakes no obligation to update publicly or revise any forward-looking statements or information, whether as a result of new information, future events or otherwise, unless so required by applicable securities laws.