UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 4)*

CHART ACQUISITION CORP.

(Name of Issuer)

COMMON STOCK, $0.0001 par value

(Title of Class of Securities)

161151204

(CUSIP Number)

December 31, 2015

(Date of Event which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

x	Rule 13d-1(b)

¨	Rule 13d-1(c)

¨	Rule 13d-1(d)

*	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).


CUSIP No. 161151204		13G		Page 2 of 7 Pages


1.	NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) BLUEMOUNTAIN CAPITAL MANAGEMENT, LLC (26-1523875)
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) ¨ (b) x
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware, United States of America
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	SOLE VOTING POWER 00,000
		6.	SHARED VOTING POWER 0
		7.	SOLE DISPOSITIVE POWER 00,000
		8.	SHARED DISPOSITIVE POWER 0
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0
10.	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions) ¨
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0%
12.	TYPE OF REPORTING PERSON (see instructions) IA


CUSIP No. 161151204		13G		Page 3 of 7 Pages


1.	NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) BLUEMOUNTAIN GP HOLDINGS, LLC (26-1523585)
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) ¨ (b) x
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware, United States of America
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	SOLE VOTING POWER 00,000
		6.	SHARED VOTING POWER 0
		7.	SOLE DISPOSITIVE POWER 00,000
		8.	SHARED DISPOSITIVE POWER 0
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0
10.	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions) ¨
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0%
12.	TYPE OF REPORTING PERSON (see instructions) OO


CUSIP No. 161151204		13G		Page 4 of 7 Pages

Item 1.

(a) Name of Issuer

Chart Acquisition Corp.

(b) Address of Issuer’s Principal Executive Offices

c/o The Chart Group, LP

555 Fifth Avenue, 19^th Floor

New York, NY 10017

Item 2.


		(a)		Name of Person Filing This Amendment No. 4 to the Schedule 13G filed with the Securities and Exchange Commission on February 13, 2013 (as amended by Amendment No. 1 thereto filed on February 12, 2014, Amendment No. 2 thereto filed on February 5, 2015 and Amendment No. 3 thereto filed on May 14, 2015, the “Schedule 13G”) is being filed on behalf of BlueMountain Capital Management, LLC (“BMCM”) and BlueMountain GP Holdings, LLC (“GP Holdings” and together with BMCM, the “Reporting Persons”) with respect to the shares of Common Stock, par value $0.0001 per share (the “Common Stock”), of Chart Acquisition Corp., a Delaware corporation. BMCM acts as investment manager to, and exercises investment discretion with respect to the Common Stock directly owned by, certain private funds that previously owned shares of Common Stock. GP Holdings serves as the ultimate general partner of certain private funds that previously owned shares of Common Stock. The filing of this statement should not be construed as an admission that any of the Reporting Persons is, for the purpose of Section 13 of the Act, the beneficial owner of the Common Stock reported herein.

		(b)		Address of the Principal Office or, if none, residence The address of the principal business office of each of the Reporting Persons is 280 Park Avenue, 12^th Floor, New York, New York 10017.

		(c)		Citizenship Each Reporting Person is a limited liability company organized under the laws of the State of Delaware, USA.

		(d)		Title of Class of Securities Common Stock, $0.0001 par value

		(e)		CUSIP Number 161151204

Item 3. If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:


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(c)	¨	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d)	¨	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e)	x	An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);

(f)	¨	An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);

(g)	¨	A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G);

(h)	¨	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)	¨	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)	¨	Group, in accordance with §240.13d-1(b)(1)(ii)(K).

Item 4. Ownership.

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

The information required by Items 4(a) – (c) is set forth in Rows 5-11 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.

BMCM and GP Holdings expressly declare that this filing shall not be construed as an admission that each is, for the purposes of sections 13(d) or 13(g) of the Act, the beneficial owner of any Common Stock.

Instruction. For computations regarding securities which represent a right to acquire an underlying security see §240.13d-3(d)(1).

Item 5. Ownership of Five Percent or Less of a Class.

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following x.

Item 6. Ownership of More than Five Percent on Behalf of Another Person.

Not Applicable

Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company.

Not Applicable

Item 8. Identification and Classification of Members of the Group.

Not Applicable

Item 9. Notice of Dissolution of Group.

Not Applicable


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Item 10. Certification.

The following certification shall be included if the statement is filed pursuant to §240.13d-1(b):

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in the connection with a nomination under §240.14a-11.


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SIGNATURES

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


DATED: February 2, 2016

BLUEMOUNTAIN CAPITAL MANAGEMENT, LLC

By:		/s/ ERIC M. ALBERT
Eric M. Albert, Chief Compliance Officer

BLUEMOUNTAIN GP HOLDINGS, LLC

By:		/s/ ERIC M. ALBERT
Eric M. Albert, Chief Compliance Officer

Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

Chart Acquisition Corp. SC 13G/A