PARTICIPATION NOTIFICATION BY BLACKROCK INC.

Brussels, Tuesday May 23, 2017, 8h00 CET --- According to the Belgian transparency legislation in force (Law of May 2, 2007), BlackRock Inc. (55 East 52nd Street, New York, NY, 10055, U.S.A.) has notified Solvay SA that

On May 16, it crossed upwards the statutory declaration threshold of 3% of the existing voting rights emitted by Solvay SA, detaining 3.03% of the existing voting rights.
On May 17, it crossed downwards the statutory declaration threshold of 3% of the existing voting rights emitted by Solvay SA.
On May 19, it crossed upwards the statutory declaration threshold of 3% of the existing voting rights emitted by Solvay SA, detaining 3.00% of the existing voting rights.

The declaration by BlackRock Inc. is published in the Investor Relations Section of Solvay's website.

Notification received on on May 18, 2017:

Reason for the notification: Acquisition of voting securities or 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 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: May 16, 2017
Threshold crossed: 3% upward (lowest declaration threshold)
Denominator: 105,876,416
Notification details: The voting rights and equivalent financial instruments total 3,206,663 voting rights or 3.03%.

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		0.00%
BlackRock (Netherlands) B.V.		10,456		0.01%
BlackRock (Singapore) Limited		4,409		0.00%
BlackRock Advisors (UK) Limited		502,340		0.47%
BlackRock Advisors, LLC		38,705		0.04%
BlackRock Asset Management Canada Limited		2,794		0.00%
BlackRock Asset Management Deutschland AG		114,933		0.11%
BlackRock Asset Management North Asia Limited		445		0.00%
BlackRock Financial Management, Inc.		3,525		0.00%
BlackRock Fund Advisors		896,151		0.85%
BlackRock Institutional Trust Company, National Association		1,025,669		0.97%
BlackRock International Limited		3,576		0.00%
BlackRock Investment Management (Australia) Limited		31,667		0.03%
BlackRock Investment Management (UK) Limited		64,188		0.06%
BlackRock Investment Management, LLC		75,687		0.07%
BlackRock Japan Co., Ltd.		83,902		0.08%
Subtotal		2,858,447	0	2.70%	0.00%

B) Equivalent financial instruments	After the transaction
Holders of equivalent financial instruments	Type of financial instrument	Expiration date	Exercise period or date	# of voting rights that may be acquired if the instrument is exercised	% of voting rights	Settlement
BlackRock Advisors (UK) Limited	Securities Lent			242,600	0.23%	physical
BlackRock Advisors (UK) Limited	Contract For Difference			478	0.00%	cash
BlackRock Advisors, LLC	Contract For Difference			52	0.00%	cash
BlackRock Asset Management Canada Limited	Securities Lent			32,336	0.03%	physical
BlackRock Fund Advisors	Securities Lent			4,091	0.00%	physical
BlackRock Institutional Trust Company, National Association	Securities Lent			309	0.00%	physical
BlackRock Institutional Trust Company, National Association	Contract For Difference			6,821	0.01%	cash
BlackRock Investment Management (UK) Limited	Securities Lent			54,400	0.05%	physical
BlackRock Investment Management, LLC	Contract For Difference			3,029	0.00%	cash
BlackRock Japan Co., Ltd.	Securities Lent			4,100	0.00%	physical
Subtotal				348,216	0.33%

Notification on May 19, 2017:

Reason for the notification: Disposal of voting securities or 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 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: May 17, 2017

Threshold crossed: 3% downward (lowest declaration threshold)

Denominator: 105,876,416

Notification received on May 22, 2017:

Reason for the notification: Acquisition of voting securities or 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 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: May 19, 2017
Threshold crossed: 3% upward (lowest declaration threshold)
Denominator: 105,876,416
Notification details: The voting rights and equivalent financial instruments total 3,177,353 voting rights or 3.00%.

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		0.00%
BlackRock (Netherlands) B.V.		10,456		0.01%
BlackRock (Singapore) Limited		4,409		0.00%
BlackRock Advisors (UK) Limited		527,953		0.50%
BlackRock Advisors, LLC		38,705		0.04%
BlackRock Asset Management Canada Limited		3,005		0.00%
BlackRock Asset Management Deutschland AG		115,763		0.11%
BlackRock Asset Management North Asia Limited		445		0.00%
BlackRock Financial Management, Inc.		3,525		0.00%
BlackRock Fund Advisors		906,374		0.86%
BlackRock Institutional Trust Company, National Association		1,026,554		0.97%
BlackRock International Limited		3,576		0.00%
BlackRock Investment Management (Australia) Limited		31,719		0.03%
BlackRock Investment Management (UK) Limited		118,588		0.11%
BlackRock Investment Management, LLC		75,776		0.07%
BlackRock Japan Co., Ltd.		84,290		0.08%
Subtotal		2,951,138	0	2.79%	0.00%

B) Equivalent financial instruments	After the transaction
Holders of equivalent financial instruments	Type of financial instrument	Expiration date	Exercise period or date	# of voting rights that may be acquired if the instrument is exercised	% of voting rights	Settlement
BlackRock Advisors (UK) Limited	Securities Lent			177,170		0.17% physical
BlackRock Asset Management Canada Limited	Securities Lent			32,336		0.03% physical
BlackRock Fund Advisors	Securities Lent			4,091		0.00% physical
BlackRock Institutional Trust Company, National Association	Securities Lent			309		0.00% physical
BlackRock Japan Co., Ltd.	Securities Lent			4,100		0.00% physical
BlackRock Advisors (UK) Limited	Contract For Difference			478	0.00% cash
BlackRock Advisors, LLC	Contract For Difference			52	0.00% cash
BlackRock Institutional Trust Company, National Association	Contract For Difference			4,650	0.00% cash
BlackRock Investment Management, LLC	Contract For Difference			3,029	0.00% cash
Subtotal				226,215	0.21%

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Solvay is a multi-specialty chemical company, committed to developing chemistry that addresses key societal challenges. Solvay innovates and partners with customers in diverse global end markets. Its products and solutions are used in planes, cars, smart and medical devices, batteries, in mineral and oil extraction, among many other applications promoting sustainability. Its lightweighting materials enhance 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 27,000 employees in 58 countries. Net sales were € 10.9 billion in 2016, with 90% from activities where Solvay ranks among the world's top 3 leaders. 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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