X FAB Silicon Foundries : Regulated information published in view of the transparency directive

Regulated information

Tessenderlo, Belgium, July 26th, 2017, 6pm CET

1. Summary of the notification

   X-FAB Silicon Foundries SE, listed on Euronext Paris, has received on 24 July 2017 a transparency notification. This transparency notification by Ameriprise Financial Inc., as the ultimate parent company of Threadneedle Asset Management Limited, indicates that Threadneedle Asset Management Limited holds 4.96% of the shares in X-FAB Silicon Foundries SE and an equity swap for 0.09% of the shares in X-FAB Silicon Foundries SE. As a result, Threadneedle Asset Management Limited now holds 5.05% of the voting rights of X- FAB Silicon Foundries SE.

2. Content of the notification

   The notification dated 24 July 2017 contains the following information:

   • Reason for the notification

     Acquisition or disposal of voting securities or voting rights

   • Notification by

     A parent undertaking or a controlling person

   • Persons subject to the notification requirement Ameriprise Financial, Inc.

   • Transaction date 18/07/2017

   • Threshold that is crossed (in %) 5

   • Denominator 130,781,669

   • Chain of controlled undertakings through which the holding is effectively held

     Threadneedle Asset Management Limited is an investment adviser which manages funds and accounts which hold the shares reported in this filing.

     Threadneedle Asset Management Limited is wholly owned by TC Financing Limited, which is itself wholly owned by Threadneedle Asset Management Holdings Limited, which is itself wholly owned by TAM UK Holdings Limited, which is itself wholly owned by Threadneedle Holdings Limited, which is itself wholly owned by Threadneedle

     Asset Management Holdings SARL, which is itself wholly owned by Ameriprise International Holdings GmbH, which is itself wholly owned by Ameriprise Financial, Inc.

     • Notified details

       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
       Ameriprise Financial, Inc.	0
       Threadneedle Asset Management Limited	6,486,784	4.96%
       Subtotal	6,486,784	4.96%
       TOTAL		6,486,784	0	4.96%	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
       Threadneedle Asset Management Limited	Equity swap	120,000	0.09%	cash
       TOTAL				120,000	0.09%

       TOTAL (A & B)		# of voting rights	% of voting rights
       6,606,784	5.05%

3. Miscellaneous

The notification can be consulted on the website of X-FAB Silicon Foundries SE via this link: www.xfab.com/fileadmin/X- FAB/Investor_Relations/Joint_Transparency_Notification_24July2017.pdf

Contact person(s): Uta Steinbrecher

Tel: +49 361 427 6489

E-Mail: uta.steinbrecher@xfab.com

X-FAB is the leading analog/mixed-signal and MEMS foundry group manufacturing silicon wafers for automotive, industrial, consumer, medical and other applications. Its customers worldwide benefit from the highest quality standards, manufacturing excellence and innovative solutions by using X-FAB's modular CMOS processes in geometries ranging from

1.0 to 0.13 μm, and its special BCD, SOI and MEMS long-lifetime processes.

X-FAB's analog-digital integrated circuits (mixed-signal ICs), sensors and micro-electro- mechanical systems (MEMS) are manufactured at six production facilities in Germany, France, Malaysia and the U.S. X-FAB employs approximately 3,800 people worldwide. For more information, please visit www.xfab.com

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