Solvay SA

Major Shareholding Notification • Oct 2, 2018

PARTICIPATION NOTIFICATION BY BLACKROCK INC.

Brussels, Tuesday, October 2, 2018, 08h30 CEST --- According to Belgian transparency legislation (Law of May 2, 2007), BlackRock Inc. (55 East 52nd Street, New York, NY, 10055, U.S.A.) has notified Solvay S.A. that:

On September 25, 2018 BlackRock Inc. crossed upwards the 3% statutory threshold for direct voting rights, holding 3.24%. Including equivalent financial instruments, the total voting rights stood at 3.40%.

Declarations by BlackRock Inc. are published in the Investor Relations Section of Solvay's website.

Notification on September 27, 2018:

• Reason for the notification: Acquisition of direct voting rights
• Notified by: BlackRock Inc. (55 East 52nd Street, New York, NY, 10055, U.S.A.)
• Persons subject to the notification requirement:

Name	Address (for legal entities)
BlackRock, Inc.	55 East 52nd Street, New York, NY, 10055, U.S.A.
BlackRock (Netherlands) B.V.	Rembrandt Tower, 17th floor, Amstelplein, Amsterdam, Netherlands
BlackRock (Singapore) Limited	20 Anson Road #18-01, Singapore, 79912, Singapore
BlackRock Advisors (UK) Limited	12 Throgmorton Avenue, London, EC2N 2DL, U.K.
BlackRock Advisors, LLC	100 Bellevue Parkway, Wilmington, DE, 19809, U.S.A.
BlackRock Asset Management Canada Limited	161 Bay Street, Suite 2500, Toronto, Ontario, M5J 2S1, Canada
BlackRock Asset Management Deutschland AG	Max-Joseph-Straße 6, Munich, 80333, Germany
BlackRock Asset Management North Asia Limited	15/F, 16/F, 17/F Citibank Tower & 17/F ICBC Tower, 3 Garden Road, Central, Hong Kong
BlackRock Capital Management, Inc.	100 Bellevue Parkway, Wilmington, 19809, U.S.A.
BlackRock Financial Management, Inc.	55 East 52nd Street, New York, NY, 10055, U.S.A.
BlackRock Fund Advisors	400 Howard Street, San Francisco, CA, 94105, U.S.A.
BlackRock Institutional Trust Company, National Association	400 Howard Street, San Francisco, CA, 94105, U.S.A.
BlackRock International Limited	Exchange Place One, 1 Semple Street, Edinburgh, EH3 8BL, U.K.
BlackRock Investment Management (Australia) Limited	Level 37, Chifley Tower, 2 Chifley Square, Sydney NSW 2000 Australia
BlackRock Investment Management (UK) Limited	12 Throgmorton Avenue, London, EC2N 2DL, U.K.
BlackRock Investment Management, LLC	1 University Square Drive, Princeton, NJ, 8540, U.S.A.
BlackRock Japan Co., Ltd.	1-8-3 Marunouchi Chiyoda-ku, Trust Tower Main, Tokyo, 100-8217, Japan

• Date on which the threshold is crossed: September 25, 2018
• Threshold of direct voting rights crossed: 3% upwards
• Denominator: 105,876,416

Notification details: The voting rights and equivalent financial instruments total 3,594,569 voting rights or 3.40%.

A) Voting rights	Previous notification	After the transaction
	# of voting rights	# of voting rights		% of voting rights
Holders of voting rights		Linked to securities	Not linked to the securities	Linked to securities	Not linked to the securities
BlackRock, Inc.	0	0		0.00%
BlackRock (Netherlands) B.V.	11,582	11,582		0.01%
BlackRock (Singapore) Limited	5,619	5,619		0.01%
BlackRock Advisors (UK) Limited	511,535	652,686		0.62%
BlackRock Advisors, LLC	55,528	55,537		0.05%
BlackRock Asset Management Canada Limited	42,041	42,041		0.04%
BlackRock Asset Management Deutschland AG	139,997	128,646		0.12%
BlackRock Asset Management North Asia Limited	856	3,703		0.00%
BlackRock Capital Management, Inc.	0	428		0.00%
BlackRock Financial Management, Inc.	19,877	21,115		0.02%
BlackRock Fund Advisors	928,439	923,555		0.87%
BlackRock Institutional Trust Company, National Association	1,071,201	1,046,350		0.99%
BlackRock International Limited	2,392	2,392		0.00%
BlackRock Investment Management (Australia) Limited	26,595	26,039		0.02%
BlackRock Investment Management (UK) Limited	181,789	204,898		0.19%
BlackRock Investment Management, LLC	81,516	103,997		0.10%
BlackRock Japan Co., Ltd.	97,231	203,417		0.19%
Subtotal	3,176,198	3,432,005		3.24%

B) Equivalent financial instruments	After the transaction
Holders of equivalent financial instruments	Type of financial instrument	Expiratio n date	Exercise period or date	# of voting rights that may be acquired if the instrument is exercised		Settlement
BlackRock Advisors (UK) Limited	Securities Lent			96,539	0.09%	physical
BlackRock Investment Management (UK) Limited	Securities Lent			16,880	0.02%	physical
BlackRock Advisors (UK) Limited	Contract For Difference			871	0.00%	cash
BlackRock Advisors, LLC	Contract For Difference			861	0.00%	cash
BlackRock Institutional Trust Company, National Association	Contract For Difference			18,704	0.02%	cash
BlackRock Investment Management (UK) Limited	Contract For Difference			176	0.00%	cash
BlackRock Investment Management, LLC	Contract For Difference			28,533	0.03%	cash
Subtotal				162.564	0.15%

Transparency declaration

Regulated information

Chain of control:

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock International Holdings, Inc. BR Jersey International Holdings L.P. BlackRock (Singapore) Holdco Pte. Ltd. BlackRock HK Holdco Limited BlackRock Lux Finco S.a.r.l. BlackRock Trident Holding Company Limited BlackRock Japan Holdings GK BlackRock Japan Co., Ltd.

BlackRock, Inc. Trident Merger, LLC BlackRock Investment Management, LLC

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock International Holdings, Inc. BR Jersey International Holdings L.P. BlackRock Group Limited BlackRock Investment Management (UK) Limited

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock International Holdings, Inc. BR Jersey International Holdings L.P. BlackRock Australia Holdco Pty. Ltd. BlackRock Investment Management (Australia) Limited

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock International Holdings, Inc. BR Jersey International Holdings L.P. BlackRock Group Limited BlackRock International Limited

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock Holdco 4, LLC BlackRock Holdco 6, LLC BlackRock Delaw are Holdings Inc. BlackRock Institutional Trust Company, National Association

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock Holdco 4, LLC BlackRock Holdco 6, LLC BlackRock Delaw are Holdings Inc. BlackRock Fund Advisors

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock Capital Holdings, Inc. BlackRock Advisors, LLC BlackRock Capital Management, Inc.

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock International Holdings, Inc. BR Jersey International Holdings L.P. BlackRock (Singapore) Holdco Pte. Ltd. BlackRock HK Holdco Limited BlackRock Asset Management North Asia Limited

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock International Holdings, Inc. BR Jersey International Holdings L.P. BlackRock Group Limited BlackRock Investment Management (UK) Limited BlackRock Asset Management Deutschland AG

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock International Holdings, Inc. BR Jersey International Holdings L.P. BlackRock Holdco 3, LLC BlackRock Canada Holdings LP BlackRock Canada Holdings ULC

BlackRock Asset Management Canada Limited

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock Capital Holdings, Inc. BlackRock Advisors, LLC

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock International Holdings, Inc. BR Jersey International Holdings L.P. BlackRock Group Limited BlackRock Advisors (UK) Limited

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock International Holdings, Inc. BR Jersey International Holdings L.P. BlackRock (Singapore) Holdco Pte. Ltd. BlackRock (Singapore) Limited

BlackRock, Inc. BlackRock Holdco 2, Inc. BlackRock Financial Management, Inc. BlackRock International Holdings, Inc. BR Jersey International Holdings L.P. BlackRock Group Limited BlackRock (Netherlands) B.V.

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Solvay is an advanced materials and specialty chemicals company, committed to developing chemistry that addresses key societal challenges. Solvay innovates and partners with customers worldwide in many diverse end markets. Its products are used in planes, cars, batteries, smart and medical devices, as well as in mineral and oil and gas extraction, enhancing efficiency and sustainability. Its lightweighting materials promote cleaner mobility, its formulations optimize the use of resources and its performance chemicals improve air and water quality.

Solvay is headquartered in Brussels with around 26,800 employees in 61 countries. Net sales were €10.1 billion in 2017, with 90% from activities where Solvay ranks among the world's top 3 leaders, resulting in an EBITDA margin of 22%. Solvay SA (SOLB.BE) is listed on Euronext Brussels and Paris Bloomberg: SOLB.BB - Reuters: SOLB.BR) and in the United States its shares (SOLVY) are traded through a level-1 ADR program.

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Ce communiqué de presse est également disponible en français. - Dit persbericht is ook in het Nederlands beschikbaar.

Solvay SA - Rue de Ransbeek, 310 – B-1120 - Bruxelles - Belgium Solvay nv - Ransbeekstraat, 310 – B-1120 - Brussels - Belgium