Celanese (CE) 8-K Celanese Outlines Strategy, Growth Objectives and Capital Allocation Plans at Investor Day

Exhibit 99.3C

Supplemental Non-US GAAP Financial Measures

November 13, 2015

In this document, the terms the "Company," "we" and "our" refer to Celanese Corporation and its subsidiaries on a consolidated basis.

Purpose

The purpose of this document is to provide information of interest to investors, analysts and other parties including supplemental financial information and reconciliations and other information concerning our use of certain non-US GAAP financial measures.

Presentation

This document presents the Company's business segments in two subtotals, reflecting our two cores, the Acetyl Chain and Materials Solutions, based on similarities among customers, business models and technical processes. The Acetyl Chain includes the Company's Acetyl Intermediates segment and the Industrial Specialties segment. Materials Solutions includes the Company's Advanced Engineered Materials segment and the Consumer Specialties segment. For comparative purposes, the historical financial information included herein has been presented to reflect the Acetyl Chain and Materials Solutions subtotals. There has been no change to the composition of the Company's business segments.

Use of Non-US GAAP Financial Measures

From time to time, management may publicly disclose certain numerical "non-GAAP financial measures" in the course of our earnings releases, financial presentations, earnings conference calls, investor and analyst meetings and otherwise. For these purposes, the Securities and Exchange Commission ("SEC") defines a "non-GAAP financial measure" as a numerical measure of historical or future financial performance, financial position, or cash flows that excludes amounts, or is subject to adjustments that effectively exclude amounts, included in the most directly comparable measure calculated and presented in accordance with US GAAP, and vice versa for measures that include amounts, or are subject to adjustments that effectively include amounts, that are excluded from the most directly comparable US GAAP measure so calculated and presented. For these purposes, "GAAP" refers to generally accepted accounting principles in the United States.

Non-GAAP financial measures disclosed by management are provided as additional information to investors, analysts and other parties as the Company believes them to be important supplemental measures for assessing our financial and operating results and as a means to evaluate period-to-period comparisons. These non-GAAP financial measures should be viewed as supplemental to, and should not be considered in isolation or as alternatives to, net earnings (loss), operating profit (loss), cash flow from operating activities or any other US GAAP financial measure. The method of calculation of the non-GAAP financial measures used herein may be different from other companies' methods for calculating measures with the same or similar titles. Investors, analysts and other parties should understand how another company calculates such non-GAAP financial measures before comparing the other company's non-GAAP financial measures to any of our own. These non-GAAP financial measures may not be indicative of the historical operating results of the Company nor are they intended to be predictive or projections of future results.

Pursuant to the requirements of SEC Regulation G, whenever we refer to a non-GAAP financial measure, we will also present on the Investor Relations/Financial Information/Non-GAAP Financial Measures page of our website, www.celanese.com, in this document, in the presentation itself or on a Form 8-K in connection with the presentation, to the extent practicable, the most directly comparable financial measure calculated and presented in accordance with GAAP, along with a reconciliation of the differences between the non-GAAP financial measure we reference and such comparable GAAP financial measure. This supplemental financial disclosure should be considered within the context of our complete audited and unaudited financial results for the given period, which are available on the Investor Relations/Financial Information/SEC Filings page of our website, www.celanese.com.

This document includes definitions and reconciliations of supplemental non-GAAP financial measures used in our 2015 Investor Day presentations. Refer to Exhibits 99.3A and 99.3B of the Form 8-K, and which are also available on the Investor Relations/Financial Information/Non-GAAP Financial Measures page of our website, www.celanese.com for our recurring definitions and reconciliations of non-GAAP financial measures as published on a quarterly basis.

1

Specific Measures Used

This document provides information about the following non-GAAP measures: adjusted EBIT, adjusted EBIT excluding strategic affiliates, operating profit (loss) attributable to Celanese Corporation, free cash flow and return on invested capital. The most directly comparable financial measure presented in accordance with US GAAP in our consolidated financial statements for adjusted EBIT and adjusted EBIT excluding strategic affiliates is net earnings (loss) attributable to Celanese Corporation; for operating profit (loss) attributable to Celanese Corporation is operating profit (loss); and for free cash flow is cash flow from operations. We do not believe that there is a directly comparable financial measure calculated and presented in accordance with GAAP for return on invested capital.

Definitions

• Adjusted EBIT is defined by the Company as net earnings (loss) attributable to Celanese Corporation, plus (earnings) loss from discontinued operations, less interest income, plus interest expense, refinancing expense and taxes, and further adjusted for certain items attributable to Celanese Corporation. We believe that adjusted EBIT provides transparent and useful information to management, investors, analysts and other parties in evaluating and assessing our primary operating results from period-to-period after removing the impact of unusual, non-operational or restructuring-related activities that affect comparability. Our management recognizes that adjusted EBIT has inherent limitations because of the excluded items. Adjusted EBIT is one of the measures management uses for planning and budgeting, monitoring and evaluating financial and operating results and as a performance metric in the Company's incentive compensation plan. We may provide guidance on adjusted EBIT but are unable to reconcile forecasted adjusted EBIT to a US GAAP financial measure without unreasonable effort because a forecast of certain items is not practical. Adjusted EBIT by business segment may also be referred to by management as segment income. Adjusted EBIT by core may also be referred to by management as core income.

• Adjusted EBIT excluding strategic affiliates is defined by the Companyas net earnings (loss) attributable to Celanese Corporation, less equity earnings and cost dividend income from strategic affiliates, plus (earnings) loss from discontinued operations, less interest income, plus interest expense, refinancing expense and taxes, and further adjusted for certain items attributable to Celanese Corporation excluding strategic affiliates. Adjusted EBIT excluding strategic affiliates has the same uses and limitations as adjusted EBIT described above.

• Operating profit (loss) attributable to Celanese Corporation is defined by the Company as operating profit (loss), less earnings (loss) attributable to noncontrolling interests ("NCI").

• Free cash flow is defined by the Company as cash flow from operations, less capital expenditures on property, plant and equipment, and adjusted for capital contributions from Mitsui & Co., Ltd. to Fairway Methanol LLC. We believe that free cash flow provides useful information to management, investors, analysts and other parties in evaluating the Company's liquidity and credit quality assessment. Although we use free cash flow as a financial measure to assess the performance of our business, the use of free cash flow has important limitations, including that free cash flow does not reflect the cash requirements necessary to service our indebtedness, lease obligations, unconditional purchase obligations or pension and postretirement funding obligations.

• Return on invested capital is defined by the Company as adjusted EBIT, tax effected using the adjusted tax rate, divided by the sum of the average of beginning and end of the year short- and long-term debt and Celanese Corporation stockholders' equity.

Note: The income tax rate used for return on invested capital approximates the midpoint in a range of forecasted tax rates for the year. This range may include certain partial or full-year forecasted tax opportunities, where applicable, and specifically excludes changes in uncertain tax positions, discrete items and other material items adjusted out of our GAAP earnings for return on invested capital purposes, and changes in management's assessments regarding the ability to realize deferred tax assets. We also reflect the impact of foreign tax credits when utilized for the return on invested capital tax rate. We analyze this rate quarterly and adjust if there is a material change in the range of forecasted tax rates; an updated forecast would not necessarily result in a change to our tax rate used for return on invested capital. The adjusted tax rate is an estimate and may differ from the actual tax rate used for GAAP reporting in any given reporting period. It is not practical to reconcile our prospective adjusted tax rate to the actual GAAP tax rate in any given future period.

Supplemental Information

For those consolidated ventures in which the Company owns or is exposed to less than 100% of the economics, the outside stockholders' interests are shown as NCI. Beginning in 2014, this includes Fairway Methanol LLC for which the Company's ownership percentage is 50%. Amounts referred to as "attributable to Celanese Corporation" are net of any applicable NCI.

2

Results Unaudited

The results in this document, together with the adjustments made to present the results on a comparable basis, have not been audited and are based on internal financial data furnished to management. Quarterly results should not be taken as an indication of the results of operations to be reported for any subsequent period or for the full fiscal year.

3

Table 1

Adjusted EBIT - Reconciliation of Non-GAAP Measures - Unaudited

	Q4 '13		Q3 '13		Q2 '13		Q1 '13		Q4 '12		Q3 '12	Q2 '12	Q1 '12		Q4 '11		Q3 '11		Q2 '11
	(In $ millions)
Net earnings (loss) attributable to Celanese Corporation	654		172		133		142		(169	)	127	221	193		(95	)	171		206
(Earnings) loss from discontinued operations	2		(1	)	—		(1	)	2		2	—	—		1		—		2
Interest income	—		—		(1	)	—		(1	)	—	—	(1	)	(1	)	(1	)	—
Interest expense	42		43		44		43		51		44	45	45		55		54		57
Refinancing expense	—		1		—		—		3		—	—	—		—		—		3
Income tax provision (benefit)	299		57		75		77		(96	)	57	57	(73	)	(114	)	35		76
Certain items attributable to Celanese Corporation(1)	(753	)	7		13		8		398		6	19	32		325		43		33
Adjusted EBIT	244		279		264		269		188		236	342	196		171		302		377

______________________________

⁽¹⁾  See Certain items presentation (Table 7) for details.

4

Table 2

Segment Data and Reconciliation of Adjusted EBIT - Non-GAAP Measures - Unaudited

	Q3 '15		Q2 '15		Q1 '15		Q4 '14		Q3 '14		Q2 '14		Q1 '14		Q4 '13		Q3 '13		Q2 '13		Q1 '13		Q4 '12		Q3 '12		Q2 '12		Q1 '12		Q4 '11		Q3 '11		Q2 '11
	(In $ millions)
Net Sales
Advanced Engineered Materials	326		346		343		331		366		389		373		325		346		352		329		299		322		323		317		292		332		346
Consumer Specialties	247		249		227		278		291		289		302		295		310		314		295		281		314		327		264		306		298		291
Total Materials Solutions	573		595		570		609		657		678		675		620		656		666		624		580		636		650		581		598		630		637
Industrial Specialties	274		287		282		265		314		333		312		273		299		295		288		251		297		327		309		272		332		329
Acetyl Intermediates	680		707		713		814		937		901		841		829		795		809		808		773		785		821		852		849		975		914
Eliminations	(82	)	(83	)	(87	)	(97	)	(109	)	(113	)	(92	)	(79	)	(85	)	(86	)	(84	)	(74	)	(80	)	(89	)	(78	)	(77	)	(95	)	(91	)
Total Acetyl Chain	872		911		908		982		1,142		1,121		1,061		1,023		1,009		1,018		1,012		950		1,002		1,059		1,083		1,044		1,212		1,152
Eliminations	(32	)	(29	)	(28	)	(32	)	(30	)	(30	)	(31	)	(27	)	(29	)	(31	)	(31	)	(29	)	(29	)	(34	)	(31	)	(28	)	(35	)	(36	)
Total	1,413		1,477		1,450		1,559		1,769		1,769		1,705		1,616		1,636		1,653		1,605		1,501		1,609		1,675		1,633		1,614		1,807		1,753
Operating Profit (Loss) Attributable to Celanese Corporation
Advanced Engineered Materials	58		67		59		57		51		56		57		781		48		39		36		4		44		23		24		(4	)	16		27
Consumer Specialties	77		77		62		104		105		80		99		100		85		83		78		62		72		77		40		58		67		49
Total Materials Solutions	135		144		121		161		156		136		156		881		133		122		114		66		116		100		64		54		83		76
Industrial Specialties	19		28		29		16		16		24		20		7		24		18		15		6		25		35		20		17		31		28
Acetyl Intermediates(1)	64		58		133		146		175		143		98		(44	)	67		55		75		66		63		78		62		64		129		153
Total Acetyl Chain	83		86		162		162		191		167		118		(37	)	91		73		90		72		88		113		82		81		160		181
Other Activities(2)	(22	)	(38	)	(24	)	(376	)	(36	)	(43	)	(30	)	100		(13	)	(26	)	(20	)	(428	)	(28	)	(35	)	(35	)	(340	)	(42	)	(44	)
Total	196		192		259		(53	)	311		260		244		944		211		169		184		(290	)	176		178		111		(205	)	201		213
Equity Earnings, Cost-Dividend Income, Other Income (Expense) Attributable to Celanese Corporation
Advanced Engineered Materials	44		31		43		40		43		45		33		33		31		45		40		47		45		55		43		36		53		39
Consumer Specialties	26		27		28		30		29		35		30		24		21		24		26		5		—		84		1		—		—		79
Total Materials Solutions	70		58		71		70		72		80		63		57		52		69		66		52		45		139		44		36		53		118
Industrial Specialties	—		—		—		—		—		—		—		—		—		—		—		—		—		—		—		1		1		—
Acetyl Intermediates	2		1		1		3		2		15		1		(4	)	3		3		3		8		2		2		1		3		3		2
Total Acetyl Chain	2		1		1		3		2		15		1		(4	)	3		3		3		8		2		2		1		4		4		2
Other Activities(2)	(4	)	9		4		6		5		36		5		—		6		10		8		20		7		4		8		11		1		11
Total	68		68		76		79		79		131		69		53		61		82		77		80		54		145		53		51		58		131

___________________________

⁽¹⁾  Excludes amounts attributable to NCI as follows:

	Q3 '15		Q2 '15		Q1 '15		Q4 '14		Q3 '14		Q2 '14		Q1 '14		Q4 '13	Q3 '13	Q2 '13	Q1 '13	Q4 '12	Q3 '12	Q2 '12	Q1 '12	Q4 '11	Q3 '11	Q2 '11
	(In $ millions)
Operating Profit (Loss)	(10	)	(4	)	(2	)	(1	)	(1	)	(1	)	(1	)	—	—	—	—	—	—	—	—	—	—	—

⁽²⁾  Other Activities includes corporate SG&A expenses, the results of captive insurance companies and certain components of net periodic benefit cost (interest cost, expected return on plan assets and net actuarial gains and losses).

5

Table 2

Segment Data and Reconciliation of Adjusted EBIT - Non-GAAP Measures - Unaudited

	Q3 '15		Q2 '15		Q1 '15		Q4 '14		Q3 '14		Q2 '14		Q1 '14		Q4 '13		Q3 '13		Q2 '13		Q1 '13		Q4 '12		Q3 '12		Q2 '12		Q1 '12			Q4 '11		Q3 '11		Q2 '11
	(In $ millions, except percentages)
Certain Items Attributable to Celanese Corporation
Advanced Engineered Materials	4		4		2		(33	)	(7	)	(7	)	(6	)	(758	)	2		2		2		11		(8	)	10		3			8		18		22
Consumer Specialties	2		1		2		(24	)	(18	)	(8	)	(2	)	(13	)	2		2		4		11		7		(1	)	17			5		3		10
Total Materials Solutions	6		5		4		(57	)	(25	)	(15	)	(8	)	(771	)	4		4		6		22		(1	)	9		20			13		21		32
Industrial Specialties	9		2		1		(9	)	(1	)	(2	)	—		6		1		1		1		—		—		—		2			1		—		—
Acetyl Intermediates	18		48		3		(12	)	(9	)	(12	)	(3	)	132		2		8		1		(5	)	7		1		2			4		12		(2	)
Total Acetyl Chain	27		50		4		(21	)	(10	)	(14	)	(3	)	138		3		9		2		(5	)	7		1		4			5		12		(2	)
Other Activities(1)	8		10		7		334		—		(33	)	—		(120	)	—		—		—		381		—		9		8			307		10		3
Total	41		65		15		256		(35	)	(62	)	(11	)	(753	)	7		13		8		398		6		19		32			325		43		33
Adjusted EBIT
Advanced Engineered Materials	106		102		104		64		87		94		84		56		81		86		78		62		81		88		70			40		87		88
Consumer Specialties	105		105		92		110		116		107		127		111		108		109		108		78		79		160		58			63		70		138
Total Materials Solutions	211		207		196		174		203		201		211		167		189		195		186		140		160		248		128			103		157		226
Industrial Specialties	28		30		30		7		15		22		20		13		25		19		16		6		25		35		22			19		32		28
Acetyl Intermediates	84		107		137		137		168		146		96		84		72		66		79		69		72		81		65			71		144		153
Total Acetyl Chain	112		137		167		144		183		168		116		97		97		85		95		75		97		116		87		(2)	90		176		181
Other Activities(1)	(18	)	(19	)	(13	)	(36	)	(31	)	(40	)	(25	)	(20	)	(7	)	(16	)	(12	)	(27	)	(21	)	(22	)	(19	)		(22	)	(31	)	(30	)
Total	305		325		350		282		355		329		302		244		279		264		269		188		236		342		196			171		302		377
Last Twelve Months ("LTM")
Acetyl Chain Adjusted EBIT	560		631		662		611		564		478		395		374		352		352		383		375		390		469		534
Acetyl Chain Adjusted EBIT margin(3)	15	%	16	%	16	%	14	%	13	%	11	%	10	%	9	%	9	%	9	%	10	%	9	%	9	%	11	%	12	%

______________________________

⁽¹⁾  Other Activities includes corporate SG&A expenses, the results of captive insurance companies and certain components of net periodic benefit cost (interest cost, expected return on plan assets and net actuarial gains and losses).

⁽²⁾  Adjusted EBIT margin, which is defined as Adjusted EBIT divided by Net sales, was 8.0%.

⁽³⁾  Defined as Acetyl Chain Adjusted EBIT divided by Net sales.

6

Table 3

Materials Solutions' Business Data and Reconciliation of Adjusted EBIT and Adjusted EBIT Excluding Strategic Affiliates - Non-GAAP Measures - Unaudited

	2014				2013				2012
	(In $ millions, except percentages)
Net Sales
Engineered Materials and Food Ingredients	1,586				1,472				1,389
Cellulose Derivatives	1,033				1,094				1,058
Total Materials Solutions	2,619				2,566				2,447
Operating Profit (Loss) attributable to Celanese Corporation
Engineered Materials and Food Ingredients	241				926				130
Cellulose Derivatives	368				324				216
Total Materials Solutions	609				1,250				346
Certain Items attributable to Celanese Corporation excluding Strategic Affiliates
Engineered Materials and Food Ingredients	(52	)			(752	)			16
Cellulose Derivatives	(47	)			(6	)			37
Total Materials Solutions	(99	)			(758	)			53
Adjusted EBIT / Adjusted EBIT Margin excluding Strategic Affiliates(1)
Engineered Materials and Food Ingredients	189		11.9	%	174		11.8	%	146		10.5	%
Cellulose Derivatives	321		31.1	%	318		29.1	%	253		23.9	%
Total Materials Solutions	510		19.5	%	492		19.2	%	399		16.3	%
Equity Earnings, Cost-Dividend Income, Other Income (Expense)
Engineered Materials and Food Ingredients	170				152				196
Cellulose Derivatives	115				92				84
Total Materials Solutions	285				244				280
Certain Items attributable to Strategic Affiliates
Engineered Materials and Food Ingredients	(6	)			1				(3	)
Cellulose Derivatives	—				—				—
Total Materials Solutions	(6	)			1				(3	)
Adjusted EBIT / Adjusted EBIT Margin(1)
Engineered Materials and Food Ingredients	353		22.3	%	327		22.2	%	339		24.4	%
Cellulose Derivatives	436		42.2	%	410		37.5	%	337		31.9	%
Total Materials Solutions	789		30.1	%	737		28.7	%	676		27.6	%

___________________________

⁽¹⁾  Defined as Adjusted EBIT and Adjusted EBIT excluding strategic affiliates, respectively, divided by Net sales.

7

Table 4

Free Cash Flow LTM - Reconciliation of a Non-GAAP Measure - Unaudited

	Q3 '15		Q2 '15		Q1 '15		Q4 '14
	(In $ millions)
Net cash provided by (used in) operating activities	173		283		270		166
Capital expenditures on property, plant and equipment	(104	)	(165	)	(162	)	(214	)
Capital contributions from Mitsui & Co., Ltd. to Fairway Methanol LLC	32		75		80		70
Free cash flow	101		193		188		22
Free cash flow LTM	504

Table 5

Return on Invested Capital Five-Year Average - Reconciliation of a Non-GAAP Measure - Unaudited

			2014				2013				2012				2011				2010
			(In $ millions, except percentages)
Adjusted EBIT			1,268				1,056				962				1,093				843
Adjusted effective tax rate			21	%			19	%			17	%			18	%			21	%
Adjusted EBIT tax effected			1,002				855				798				896				666
	2014	2013	Average		2013	2012	Average		2012	2011	Average		2011	2010	Average		2010	2009	Average
	(In $ millions, except percentages)
Short-term borrowings and current installments of long-term debt - third parties and affiliates	137	177	157		177	168	173		168	144	156		144	228	186		228	242	235
Long-term debt	2,608	2,887	2,748		2,887	2,930	2,909		2,930	2,873	2,902		2,873	2,990	2,932		2,990	3,259	3,125
Celanese Corporation stockholders' equity	2,818	2,699	2,759		2,699	1,730	2,215		1,730	1,341	1,536		1,341	926	1,134		926	586	756
Invested capital			5,664				5,297				4,594				4,252				4,116
Return on invested capital			17.7	%			16.1	%			17.4	%			21.1	%			16.2	%
Return on invested capital five-year average			17.7	%

8

Table 6

Return on Invested Capital LTM - Reconciliation of a Non-GAAP Measure - Unaudited

				Q3 '15 LTM		Q3 '15		Q2 '15		Q1 '15		Q4 '14
				(In $ millions, except percentages)
Adjusted EBIT				1,262		305		325		350		282
Adjusted effective tax rate						18	%	18	%	18	%	21	%
Adjusted EBIT tax effected				1,027		250		267		287		223
	Q3 '15	Q3 '14		Average
	(In $ millions, except percentages)
Short-term borrowings and current installments of long-term debt - third parties and affiliates	463	165	(1)	314
Long-term debt	2,541	2,639		2,590
Celanese Corporation stockholders' equity	2,766	2,944		2,855
Invested capital				5,759
Return on invested capital LTM				17.8	%

___________________________

⁽¹⁾  Excludes $600 million principal amount of 6.625% senior unsecured notes due 2018, which were redeemed in October 2014.

9

Table 7

Certain Items - Unaudited

The following Certain items are included in Net earnings (loss) and are adjustments to non-GAAP measures:

	Q4 '13		Q3 '13	Q2 '13	Q1 '13	Q4 '12		Q3 '12		Q2 '12	Q1 '12	Q4 '11	Q3 '11		Q2 '11		Income Statement Classification
	(In $ millions)
Employee termination benefits	20		—	1	2	4		1		1	—	4	5		9		Other charges (gains), net
Plant/office closures	40		1	1	1	5		10		2	4	3	2		7		Other charges (gains), net / Cost of sales / SG&A
Business optimization	—		—	—	—	1		—		3	5	1	2		2		Cost of sales / SG&A
Asset impairments	81		2	—	—	8		—		—	—	1	—		—		Other charges (gains), net / Other income (expense), net
(Gain) loss on disposition of business and assets, net	1		1	—	—	—		1		—	—	—	(1	)	(1	)	(Gain) loss on disposition, net
Commercial disputes	7		—	5	—	—		(2	)	—	—	1	14		(2	)	Other charges (gains), net / Cost of sales / SG&A
Kelsterbach plant relocation	(733	)	2	2	2	12		(4	)	10	3	5	19		21		Other charges (gains), net / Cost of sales / (Gain) loss on disposition
InfraServ Hoechst restructuring	8		—	—	—	(22	)	—		—	—	—	—		—		Equity in net (earnings) loss of affiliates
Plumbing actions	—		—	—	—	(1	)	(4	)	—	—	—	(2	)	(4	)	Other charges (gains), net
Write-off of other productive assets	—		—	—	—	—		—		—	—	—	—		(1	)	Cost of sales
Acetate production interruption costs	—		—	—	—	—		—		—	10	—	—		—		Cost of sales
Employee benefit plan changes	(71	)	—	—	—	—		—		—	—	—	—		—		Cost of sales / SG&A / R&D
Actuarial (gain) loss on pension and postretirement plans	(106	)	—	—	—	389		—		—	—	306	—		—		Cost of sales / SG&A / R&D
Other	—		1	4	3	2		4		3	10	4	4		2		Various
Certain items attributable to Celanese Corporation	(753	)	7	13	8	398		6		19	32	325	43		33

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