UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number: 811-08426

AB SUSTAINABLE INTERNATIONAL THEMATIC FUND, INC.

(Exact name of registrant as specified in charter)

1345 Avenue of the Americas, New York, New York 10105

(Address of principal executive offices) (Zip code)

Joseph J. Mantineo

AllianceBernstein L.P.

1345 Avenue of the Americas

New York, New York 10105

(Name and address of agent for service)

Registrant’s telephone number, including area code: (800) 221-5672

Date of fiscal year end: June 30, 2019

Date of reporting period: September 30, 2018

ITEM 1. SCHEDULE OF INVESTMENTS.

AB Sustainable International Thematic Fund

Portfolio of Investments

September 30, 2018 (unaudited)

Company	Shares		U.S. $ Value
COMMON STOCKS - 90.3%
Financials - 22.2%
Banks - 9.6%
Credicorp Ltd.		29,600	$	6,603,168
HDFC Bank Ltd.		234,980		6,502,712
Svenska Handelsbanken AB-Class A		443,683		5,595,571
Swedbank AB-Class A		284,959		7,047,653
				25,749,104
Capital Markets - 4.3%
London Stock Exchange Group PLC		55,670		3,326,657
Partners Group Holding AG		10,574		8,382,205
				11,708,862
Consumer Finance - 1.8%
Bharat Financial Inclusion Ltd. (a)		332,650		4,769,820
Insurance - 4.5%
AIA Group Ltd.		784,200		6,992,649
Prudential PLC		226,706		5,197,926
				12,190,575
Thrifts & Mortgage Finance - 2.0%
Housing Development Finance Corp., Ltd.		220,175		5,315,877
				59,734,238
Industrials - 13.8%
Building Products - 4.3%
Cie de Saint-Gobain		76,420		3,293,777
Kingspan Group PLC		80,784		3,766,778
Kingspan Group PLC (London)		97,510		4,562,523
				11,623,078
Commercial Services & Supplies - 1.6%
China Everbright International Ltd.		5,106,000		4,408,461
Electrical Equipment - 4.7%
Schneider Electric SE (Paris)		84,289		6,768,152
Vestas Wind Systems A/S		85,960		5,807,136
				12,575,288
Industrial Conglomerates - 3.2%
Siemens AG (REG)		67,317		8,607,396
				37,214,223
Information Technology - 11.8%
Electronic Equipment, Instruments & Components - 2.6%
Halma PLC		233,819		4,402,078
Horiba Ltd.		49,400		2,618,389
				7,020,467
Semiconductors & Semiconductor Equipment - 7.0%
ams AG (a)		49,794		2,802,642
ASML Holding NV		17,896		3,360,056
Infineon Technologies AG		231,042		5,257,561

Company	Shares		U.S. $ Value
Taiwan Semiconductor Manufacturing Co., Ltd.		855,000	$	7,296,173
				18,716,432
Software - 2.2%
Dassault Systemes SE		39,820		5,958,560
				31,695,459
Consumer Staples - 11.5%
Food & Staples Retailing - 1.6%
Tsuruha Holdings, Inc.		36,000		4,431,230
Food Products - 4.7%
Kerry Group PLC-Class A		55,845		6,162,931
Nestle SA (REG)		77,049		6,413,299
				12,576,230
Household Products - 2.4%
Unicharm Corp.		193,800		6,411,999
Personal Products - 2.8%
Godrej Consumer Products Ltd.		406,597		4,342,237
Unilever PLC		58,320		3,203,759
				7,545,996
				30,965,455
Health Care - 10.4%
Health Care Equipment & Supplies - 2.5%
Essilor International Cie Generale d’Optique SA		45,876		6,790,554
Health Care Providers & Services - 2.2%
Apollo Hospitals Enterprise Ltd.		401,235		5,832,796
Life Sciences Tools & Services - 3.7%
Gerresheimer AG		55,884		4,717,825
ICON PLC (a)		30,730		4,724,738
Tecan Group AG		2,324		550,162
				9,992,725
Pharmaceuticals - 2.0%
Roche Holding AG		16,237		3,926,357
Vectura Group PLC (a)		1,420,506		1,476,765
				5,403,122
				28,019,197
Consumer Discretionary - 8.2%
Auto Components - 4.9%
Aptiv PLC		86,519		7,258,944
Delphi Technologies PLC		104,820		3,287,155
Valeo SA		62,630		2,711,934
				13,258,033
Household Durables - 1.6%
Panasonic Corp.		368,800		4,274,845
Textiles, Apparel & Luxury Goods - 1.7%
Shenzhou International Group Holdings Ltd.		342,000		4,388,246

Company	Shares			U.S. $ Value
				$	21,921,124
Utilities - 3.7%
Multi-Utilities - 1.7%
Suez		317,290			4,513,420
Water Utilities - 2.0%
Beijing Enterprises Water Group Ltd. (a)		6,762,000			3,604,927
Cia de Saneamento Basico do Estado de Sao Paulo		295,100			1,723,740
					5,328,667
					9,842,087
Materials - 3.6%
Chemicals - 3.6%
Chr Hansen Holding A/S		28,957			2,935,824
Koninklijke DSM NV		25,127			2,661,284
Umicore SA		72,527			4,051,244
					9,648,352
Communication Services - 3.4%
Diversified Telecommunication Services - 2.0%
Deutsche Telekom AG (REG)		327,395			5,270,613
Interactive Media & Services - 1.4%
Tencent Holdings Ltd.		96,000			3,919,759
					9,190,372
Real Estate - 1.7%
Real Estate Management & Development - 1.7%
SM Prime Holdings, Inc.		6,840,600			4,577,492
Total Common Stocks (cost $192,793,124)					242,807,999
SHORT-TERM INVESTMENTS - 7.5%
Investment Companies - 7.4%
AB Fixed Income Shares, Inc.-Government Money Market Portfolio-Class AB, 1.98% (b)(c)(d) (cost $19,769,852)		19,769,852			19,769,852
	Principal Amount (000)
Time Deposits - 0.1%
BBH, Grand Cayman
(1.45)%, 10/01/18	CHF	27			27,931
(0.87)%, 10/01/18	SEK	254			28,602
(0.80)%, 10/01/18	DKK	176			27,430
0.37%, 10/01/18	GBP	85			110,503
0.65%, 10/01/18	CAD	0	*		1
6.50%, 10/01/18	ZAR	0	*		4
BNP Paribas, Paris
(0.57)%, 10/01/18	EUR	18			21,270
2.03%, 10/02/18	HKD	970			123,851

	Principal Amount (000)		U.S. $ Value
Sumitomo, Tokyo (0.22)%, 10/01/18	JPY	3,098	$	27,268
Total Time Deposits (cost $365,389)				366,860
Total Short-Term Investments (cost $20,135,241)				20,136,712
Total Investments – 97.8% (cost $212,928,365) (e)				262,944,711
Other assets less liabilities – 2.2%				5,932,570
Net Assets – 100.0%			$	268,877,281

FORWARD CURRENCY EXCHANGE CONTRACTS

Counterparty	Contracts to Deliver (000)			In Exchange For (000)			Settlement Date		Unrealized Appreciation/ (Depreciation)
Bank of America, NA		EUR	839		USD	986		11/14/18	$	8,771
Bank of America, NA		JPY	88,054		USD	792		11/14/18		14,991
Bank of America, NA		SEK	9,858		USD	1,131		11/14/18		17,297
Bank of America, NA		USD	798		EUR	683		11/14/18		(2,693	)
Bank of America, NA		USD	2,285		RUB	151,370		11/14/18		14,724
Bank of America, NA		PHP	228,418		USD	4,169		12/11/18		(32,076	)
Bank of America, NA		INR	47,181		USD	663		12/13/18		20,039
Barclays Bank PLC		CNY	16,184		USD	2,340		10/25/18		(10,900	)
Barclays Bank PLC		TWD	20,353		USD	664		12/11/18		(8,210	)
Barclays Bank PLC		USD	1,721		INR	126,945		12/13/18		8,632
Barclays Bank PLC		USD	1,082		INR	79,188		12/13/18		(3,127	)
BNP Paribas SA		USD	3,619		CNY	24,883		10/25/18		(3,908	)
BNP Paribas SA		GBP	2,212		USD	2,817		11/14/18		(71,834	)
BNP Paribas SA		USD	1,959		MXN	37,785		11/14/18		45,810
Brown Brothers Harriman & Co.		EUR	1,642		USD	1,937		11/14/18		24,309
Brown Brothers Harriman & Co.		HKD	10,895		USD	1,391		11/14/18		(2,096	)
Brown Brothers Harriman & Co.		USD	4,158		JPY	462,722		11/14/18		(71,874	)
Brown Brothers Harriman & Co.		USD	305		NZD	463		11/14/18		1,809
Brown Brothers Harriman & Co.		USD	2,064		ZAR	29,826		11/14/18		32,485
Citibank, NA		BRL	6,710		USD	1,676		10/02/18		14,379
Citibank, NA		USD	1,619		BRL	6,710		10/02/18		42,494
Citibank, NA		USD	2,401		CNY	16,184		10/25/18		(50,079	)
Citibank, NA		CAD	872		USD	665		11/14/18		(10,794	)
Citibank, NA		EUR	3,223		USD	3,770		11/14/18		14,906
Citibank, NA		SEK	51,311		USD	5,657		11/14/18		(137,463	)
Citibank, NA		USD	19,239		GBP	15,075		11/14/18		447,733
Citibank, NA		USD	1,126		JPY	125,061		11/14/18		(22,110	)
Citibank, NA		USD	9,791		KRW	11,072,524		11/15/18		196,678
Citibank, NA		INR	2,032,569		USD	29,130		12/13/18		1,431,865
Credit Suisse International		USD	2,016		EUR	1,766		11/14/18		41,155
Deutsche Bank AG		USD	12,442		AUD	17,187		11/14/18		(14,487	)
Goldman Sachs Bank USA		CHF	1,947		USD	1,973		11/14/18		(19,005	)
Goldman Sachs Bank USA		GBP	1,842		USD	2,404		11/14/18		(1,652	)
Goldman Sachs Bank USA		USD	1,403		JPY	154,985		11/14/18		(34,436	)
Goldman Sachs Bank USA		USD	1,323		NOK	11,077		11/14/18		40,685
JPMorgan Chase Bank, NA		CHF	721		USD	735		11/14/18		(2,397	)
JPMorgan Chase Bank, NA		GBP	711		USD	927		11/14/18		(1,269	)

Counterparty	Contracts to Deliver (000)			In Exchange For (000)			Settlement Date		Unrealized Appreciation/ (Depreciation)
JPMorgan Chase Bank, NA		USD	22,691		JPY	2,501,604		11/14/18	$	(602,720	)
Morgan Stanley & Co. LLC		BRL	6,710		USD	1,629		10/02/18		(32,451	)
Morgan Stanley & Co. LLC		USD	1,676		BRL	6,710		10/02/18		(14,379	)
Morgan Stanley & Co. LLC		USD	1,624		BRL	6,710		11/05/18		32,537
Morgan Stanley & Co. LLC		CHF	645		USD	669		11/14/18		8,762
Morgan Stanley & Co. LLC		EUR	828		USD	970		11/14/18		5,508
Morgan Stanley & Co. LLC		USD	539		HKD	4,227		11/14/18		990
Royal Bank of Scotland PLC		EUR	18,257		USD	20,845		11/14/18		(425,448	)
Royal Bank of Scotland PLC		USD	18,390		CAD	24,029		11/14/18		229,998
Standard Chartered Bank		USD	1,274		TWD	38,996		12/11/18		13,403
UBS AG		JPY	75,532		USD	681		11/14/18		14,485
									$	1,149,037

* Principal amount less than 500.

(a) Non-income producing security.

(b) Affiliated investments.

(c) To obtain a copy of the fund’s shareholder report, please go to the Securities and Exchange Commission’s website at www.sec.gov, or call AB at (800) 227-4618.

(d) The rate shown represents the 7-day yield as of period end.

(e) As of September 30, 2018, the cost basis of investment securities owned was substantially identical for both book and tax purposes. Gross unrealized appreciation of investments was $66,523,314 and gross unrealized depreciation of investments was $(15,357,931), resulting in net unrealized appreciation of $51,165,383.

Please note: The sector classifications presented herein are based on the Global Industry Classification Standard (GICS) which was developed by Morgan Stanley Capital International and Standard & Poor’s. The components are divided into sector, industry group, and industry sub-indices as classified by the GICS for each of the market capitalization indices in the broad market.

Currency Abbreviations:

AUD	-	Australian Dollar
BRL	-	Brazilian Real
CAD	-	Canadian Dollar
CHF	-	Swiss Franc
CNY	-	Chinese Yuan Renminbi
DKK	-	Danish Krone
EUR	-	Euro
GBP	-	Great British Pound
HKD	-	Hong Kong Dollar
INR	-	Indian Rupee
JPY	-	Japanese Yen
KRW	-	South Korean Won
MXN	-	Mexican Peso
NOK	-	Norwegian Krone
NZD	-	New Zealand Dollar
PHP	-	Philippine Peso
RUB	-	Russian Ruble
SEK	-	Swedish Krona
TWD	-	New Taiwan Dollar
USD	-	United States Dollar
ZAR	-	South African Rand

Glossary:

REG - Registered Shares

COUNTRY BREAKDOWN ¹

September 30, 2018 (unaudited)

11.4%	France
10.2%	India
9.0%	Germany
7.3%	Switzerland
6.8%	Japan
6.7%	United Kingdom
6.2%	China
5.8%	United States
5.5%	Ireland
4.8%	Sweden
3.3%	Denmark
2.8%	Taiwan
2.7%	Hong Kong
9.8%	Other
7.7%	Short-Term
100.0%	Total Investments

* All data are as of September 30, 2018. The Fund’s country breakdown is expressed as a percentage of total investments and may vary over time. “Other” country weightings represent 2.3% or less in the following countries: Austria, Belgium, Brazil, Netherlands, Peru and Philippines.

AB Sustainable International Thematic Fund

September 30, 2018 (unaudited)

In accordance with U.S. GAAP regarding fair value measurements, fair value is defined as the price that the Fund would receive to sell an asset or pay to transfer a liability in an orderly transaction between market participants at the measurement date. U.S GAAP establishes a framework for measuring fair value, and a three-level hierarchy for fair value measurements based upon the transparency of inputs to the valuation of an asset or liability (including those valued based on their market values). Inputs may be observable or unobservable and refer broadly to the assumptions that market participants would use in pricing the asset or liability. Observable inputs reflect the assumptions market participants would use in pricing the asset or liability based on market data obtained from sources independent of the Fund. Unobservable inputs reflect the Fund’s own assumptions about the assumptions that market participants would use in pricing the asset or liability based on the best information available in the circumstances. Each investment is assigned a level based upon the observability of the inputs which are significant to the overall valuation. The three-tier hierarchy of inputs is summarized below.

• Level 1—quoted prices in active markets for identical investments

• Level 2—other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.)

• Level 3—significant unobservable inputs (including the Fund’s own assumptions in determining the fair value of investments)

The fair value of debt instruments, such as bonds, and over-the-counter derivatives is generally based on market price quotations, recently executed market transactions (where observable) or industry recognized modeling techniques and are generally classified as Level 2. Pricing vendor inputs to Level 2 valuations may include quoted prices for similar investments in active markets, interest rate curves, coupon rates, currency rates, yield curves, option adjusted spreads, default rates, credit spreads and other unique security features in order to estimate the relevant cash flows which is then discounted to calculate fair values. If these inputs are unobservable and significant to the fair value, these investments will be classified as Level 3. In addition, non-agency rated investments are classified as Level 3.

Where readily available market prices or relevant bid prices are not available for certain equity investments, such investments may be valued based on similar publicly traded investments, movements in relevant indices since last available prices or based upon underlying company fundamentals and comparable company data (such as multiples to earnings or other multiples to equity). Where an investment is valued using an observable input, such as another publicly traded security, the investment will be classified as Level 2. If management determines that an adjustment is appropriate based on restrictions on resale, illiquidity or uncertainty, and such adjustment is a significant component of the valuation, the investment will be classified as Level 3. An investment will also be classified as Level 3 where management uses company fundamentals and other significant inputs to determine the valuation.

The following table summarizes the valuation of the Fund’s investments by the above fair value hierarchy levels as of September 30, 2018:

Investments in Securities

Level 1

Level 2

Level 3

Total

Assets:

Common Stocks:

Financials

$

13,105,880

$

46,628,358

$

– 0

–

$

59,734,238

Industrials

8,329,301

28,884,922

– 0

–

37,214,223

Information Technology

– 0

–

31,695,459

– 0

–

31,695,459

Consumer Staples

6,162,931

24,802,524

– 0

–

30,965,455

Health Care

4,724,738

23,294,459

– 0

–

28,019,197

Consumer Discretionary

10,546,099

11,375,025

– 0

–

21,921,124

Utilities

1,723,740

8,118,347

– 0

–

9,842,087

Materials

– 0

–

9,648,352

– 0

–

9,648,352

Communication Services

– 0

–

9,190,372

– 0

–

9,190,372

Real Estate

– 0

–

4,577,492

– 0

–

4,577,492

Short-Term Investments:

Investment Companies

19,769,852

– 0

–

– 0

–

19,769,852

Time Deposits

– 0

–

366,860

– 0

–

366,860

Total Investments in Securities

64,362,541

198,582,170

†

– 0

–

262,944,711

Other Financial Instruments*:

Assets

Forward Currency Exchange Contracts

– 0

–

2,724,445

– 0

–

2,724,445

Liabilities

Forward Currency Exchange Contracts

– 0

–

(1,575,408

)

– 0

–

(1,575,408

)

Total^

$

64,362,541

$

199,731,207

$

– 0

–

$

264,093,748

† A significant portion of the Fund’s foreign equity investments are categorized as Level 2 investments since they are valued using fair value prices based on third party vendor modeling tools to the extent available.

* Other financial instruments are derivative instruments, such as futures, forwards and swaps, which are valued at the unrealized appreciation/(depreciation) on the instrument. Other financial instruments may also include swaps with upfront premiums, options written and swaptions written which are valued at market value.

^ An amount of $9,151,260 was transferred from Level 2 to Level 1 due to the above mentioned foreign equity fair valuation using third party vendor modeling tools not being used during the reporting period. There were no transfers from Level 1 to Level 2 during the reporting period.

The Fund recognizes all transfers between levels of the fair value hierarchy assuming the financial instrument was transferred at the beginning of the reporting period.

The Adviser established a Valuation Committee (the “Committee”) to oversee the pricing and valuation of all securities held in the Fund. The Committee operates under pricing and valuation policies and procedures established by the Adviser and approved by the Board, including pricing policies which set forth the mechanisms and processes to be employed on a daily basis to implement these policies and procedures. In particular, the pricing policies describe how to determine market quotations for securities and other instruments. The Committee’s responsibilities include: 1) fair value and liquidity determinations (and oversight of any third parties to whom any responsibility for fair value and liquidity determinations is delegated), and 2) regular monitoring of the Adviser’s pricing and valuation policies and procedures and modification or enhancement of these policies and procedures (or recommendation of the modification of these policies and procedures) as the Committee believes appropriate.

The Committee is also responsible for monitoring the implementation of the pricing policies by the Adviser’s Pricing Group (the “Pricing Group”) and any third party which performs certain pricing functions in accordance with the pricing policies. The Pricing Group is responsible for the oversight of the third party on a day-to-day basis. The Committee and the Pricing Group perform a series of activities to provide reasonable assurance of the accuracy of prices including: 1) periodic vendor due diligence meetings, review of methodologies, new developments, and process at vendors, 2) daily comparison of security valuation versus prior day for all securities that exceeded established thresholds, and 3) daily review of unpriced, stale, and variance reports with exceptions reviewed by senior management and the Committee.

In addition, several processes outside of the pricing process are used to monitor valuation issues including: 1) performance and performance attribution reports are monitored for anomalous impacts based upon benchmark performance, and 2) portfolio managers review all portfolios for performance and analytics (which are generated using the Adviser’s prices).

A summary of the Fund’s transactions in AB mutual funds for the three months ended September 30, 2018 is as follows:

Fund	Market Value 6/30/18 (000)		Purchases at Cost (000)		Sales Proceeds (000)		Market Value 9/30/18 (000)		Dividend Income (000)
Government Money Market Portfolio	$	20,896	$	16,021	$	17,147	$	19,770	$	91

ITEM 2. CONTROLS AND PROCEDURES.

(a) The registrant’s principal executive officer and principal financial officer have concluded that the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended) are effective at the reasonable assurance level based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this document.

(b) There were no significant changes in the registrant’s internal control over financial reporting that could significantly affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses.

ITEM 3. EXHIBITS.

The following exhibits are attached to this Form N-Q:

EXHIBIT NO.	DESCRIPTION OF EXHIBIT
11 (a) (1)	Certification of Principal Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
11 (a) (2)	Certification of Principal Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant): AB Sustainable International Thematic Fund, Inc.

By:	/s/    Robert M. Keith
	Robert M. Keith
	President
Date:	November 21, 2018

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:	/s/    Robert M. Keith
	Robert M. Keith
	President
Date:	November 21, 2018
By:	/s/    Joseph J. Mantineo
	Joseph J. Mantineo
	Treasurer and Chief Financial Officer
Date:	November 21, 2018