UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K/A

(Amendment No. 1)

(Mark One)

x	ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2014

¨	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission file number: 000-50700

ATLAS AMERICA PUBLIC #12-2003 LIMITED PARTNERSHIP

(Exact name of registrant as specified in its charter)

Delaware		54-2113989
(State or other jurisdiction or incorporation or organization)		(I.R.S. Employer Identification No.)
Park Place Corporate Center One 1000 Commerce Drive, Suite 400 Pittsburgh, PA		15275
(Address of principal executive offices)		Zip code

Registrant’s telephone number, including area code: (412) 489-0006

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Name of each exchange on which registered
None		None

Securities registered pursuant to Section 12(g) of the Exchange Act:

Common Units representing Limited Partnership Interests

(Title of Class)

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ¨ No x

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ¨ No x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes x No ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. x

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definitions of “large accelerated filer”, “accelerated filer”, and “small reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer ¨

Accelerated filer ¨

Non-accelerated filer ¨

Smaller reporting company x

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ¨ No x

DOCUMENTS INCORPORATED BY REFERENCE: None

ATLAS AMERICA PUBLIC #12-2003 LIMITED PARTNERSHIP

Explanatory Note

This abbreviated amendment on Form 10-K/A (this “Amendment”) amends the Form 10-K for the year ended December 31, 2014 filed by Atlas America Public #12-2003 Limited Partnership on March 31, 2015 (the “Original Filing”). This Amendment is being filed solely to correct the signature page contained in the Original Filing.

Except as described above and in the revised exhibit list included below, this Amendment does not revise or update or in any way affect any information or disclosures contained in the Original Filing.

PART IV

ITEM 15: EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

EXHIBIT INDEX

	Description	Location

4(a)	Certificate of Limited Partnership for Atlas America Public #12-2003 Limited Partnership	Previously filed in our Form S-1/A on June 3, 2003

4(b)	Amended and Restated Certificate and Agreement of Limited	Previously filed in our Form S-1/A on June 3, 2003
	Partnership for Atlas America Public #12-2003 Limited Partnership

4(c)	Drilling and Operating Agreement for Atlas America Public #12-2003 Limited Partnership ⁽¹⁾	Previously filed in our Form S-1/A on June 3, 2003

23.1	Consent of Wright & Company, Inc.	Previously filed as an exhibit to our Form 10-K filed on March 31, 2015

31.1	Rule 13a-14(a)/15(d) – 14 (a) Certification	Filed herewith

31.2	Rule 13a-14(a)/15(d) – 14 (a) Certification.	Filed herewith

32.1	Section 1350 Certification.	Filed herewith

32.2	Section 1350 Certification.	Filed herewith

99.1	Summary Reserve Report	Previously filed as an exhibit to our Form 10-K filed on March 31, 2015

101	Interactive Data File	Previously filed as an exhibit to our Form 10-K filed on March 31, 2015


(1)	Filed on September 3, 2003 in the Form S-1 Registration Statement dated September 3, 2003, File No. 333-105811

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities of the Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	ATLAS AMERICA PUBLIC #12-2003 LIMITED PARTNERSHIP

	BY: ATLAS RESOURCES, LLC, ITS GENERAL PARTNER
Date: September 11, 2015	By:	/s/ FREDDIE M. KOTEK
		Freddie M. Kotek, Chairman of the Board of Directors and Chief Executive Officer (principal executive officer)

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following person on behalf of the registrant and in the capacities and on the dates indicated.



Date: September 11, 2015	By:	/s/ FREDDIE M. KOTEK
		Freddie M. Kotek, Chairman of the Board of Directors and Chief Executive Officer (principal executive officer)

Date: September 11, 2015	By:	/s/ SEAN P. MCGRATH
		Sean P. McGrath, Chief Financial Officer (principal financial officer and principal accounting officer)

Date: September 11, 2015	By:	/s/ DANIEL C. HERZ
		Daniel C. Herz, Director

ATLAS AMERICA PUBLIC #12-2003 Limited Partnership 10-K/A