Press Release: Notification in accordance with section 26 paragraph 1 WpHG

ADVA Optical Networking SE / Notification in accordance with section 26 paragraph 1 WpHG . Ad hoc announcement according to -- 15 WpHG. Processed and transmitted by Thomson Reuters ONE. The issuer is solely responsible for the content of this announcement.

We have received the following notifications of voting rights pursuant to section 21 paragraph 1

of the German Securities Trading Act (WpHG) on October 14, 2013:

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Part 1 of 6

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Notification pursuant to section 21 paragraph 1 WpHG

1. Listed company:

ADVA Optical Networking SE

Maerzenquelle 1-3, 98617 Meiningen-Dreissigacker, Germany

2. Notifier: ING Investment Management Belgium S.A., Brussels, Belgium

3. Triggering event: Above threshold

4. Threshold (s) crossed or reached: 3%

5. Date at which the threshold is crossed or reached: October 10, 2013

6. Voting rights:

Total amount: 3.01% (1442593 voting rights)

Held indirectly: 3.01% (1442593 voting rights)

attributable to the notifier pursuant to section 22 paragraph 2 WpHG.

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Part 2 of 6

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Notification pursuant to section 21 paragraph 1 WpHG

1. Listed company:

ADVA Optical Networking SE

Maerzenquelle 1-3, 98617 Meiningen-Dreissigacker, Germany

2. Notifier: ING Fund Management B.V, Den Haag, The Netherlands

3. Triggering event: Above threshold

4. Threshold (s) crossed or reached: 3%

5. Date at which the threshold is crossed or reached: October 10, 2013

6. Voting rights:

Total amount: 3.01% (1442593 voting rights)

Held indirectly: 1.78% (851439 voting rights)

attributable to the notifier pursuant to section 22 paragraph 2 WpHG.

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Part 3 of 6

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Notification pursuant to section 21 paragraph 1 WpHG

1. Listed company:

ADVA Optical Networking SE

Maerzenquelle 1-3, 98617 Meiningen-Dreissigacker, Germany

2. Notifier: ING Investment Management Luxembourg S.A., Luxembourg, Luxembourg

3. Triggering event: Above threshold

4. Threshold (s) crossed or reached: 3%

5. Date at which the threshold is crossed or reached: October 10, 2013

6. Voting rights:

Total amount: 3.01% (1442593 voting rights)

Held indirectly: 1.23% (591154 voting rights)

attributable to the notifier pursuant to section 22 paragraph 2 WpHG.

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Part 4 of 6

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Notification pursuant to section 21 paragraph 1 WpHG

1. Listed company:

ADVA Optical Networking SE

Maerzenquelle 1-3, 98617 Meiningen-Dreissigacker, Germany

2. Notifier: ING Investment Management Belgium S.A., Brussels, Belgium

3. Triggering event: Below threshold

4. Threshold (s) crossed or reached: 3%

5. Date at which the threshold is crossed or reached: October 8, 2013

6. Voting rights:

Total amount: 2.97% (1426729 voting rights)

Held indirectly: 2.97% (1426729 voting rights)

attributable to the notifier pursuant to section 22 paragraph 2 WpHG.

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Part 5 of 6

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Notification pursuant to section 21 paragraph 1 WpHG

1. Listed company:

ADVA Optical Networking SE

Maerzenquelle 1-3, 98617 Meiningen-Dreissigacker, Germany

2. Notifier: ING Fund Management B.V, Den Haag, The Netherlands

3. Triggering event: Below threshold

4. Threshold (s) crossed or reached: 3%

5. Date at which the threshold is crossed or reached: October 8, 2013

6. Voting rights:

Total amount: 2.97% (1426729 voting rights)

Held indirectly: 1.74% (835575 voting rights)

attributable to the notifier pursuant to section 22 paragraph 2 WpHG.

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Part 6 of 6

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Notification pursuant to section 21 paragraph 1 WpHG

1. Listed company:

ADVA Optical Networking SE

Maerzenquelle 1-3, 98617 Meiningen-Dreissigacker, Germany

2. Notifier: ING Investment Management Luxembourg S.A., Luxembourg, Luxembourg

3. Triggering event: Below threshold

4. Threshold (s) crossed or reached: 3%

5. Date at which the threshold is crossed or reached: October 8, 2013

6. Voting rights:

Total amount: 2.97% (1426729 voting rights)

Held indirectly: 1.23% (591154 voting rights)

attributable to the notifier pursuant to section 22 paragraph 2 WpHG.

ADVA Optical Networking SE

Maerzenquelle 1-3, 98617 Meiningen-Dreissigacker, Germany

t +49 3693 450 0, f +49 3963 450 499

investor-relations@advaoptical.com, www.advaoptical.com

Let's ADVANCE

This announcement is distributed by Thomson Reuters on behalf of Thomson Reuters clients.

The owner of this announcement warrants that:

(i) the releases contained herein are protected by copyright and other applicable laws; and

(ii) they are solely responsible for the content, accuracy and originality of the

information contained therein.

Source: ADVA Optical Networking SE via Thomson Reuters ONE

HUG#1735523

--- End of Message ---

ADVA Optical Networking SE

Campus Martinsried, Fraunhoferstr. 9a Martinsried/Munich Germany

WKN: 510300;ISIN: DE0005103006;

Listed: Freiverkehr in Hanseatische Wertpapierbörse zu Hamburg,

Freiverkehr in Börse Berlin,

Freiverkehr in Börse Düsseldorf,

Freiverkehr in Bayerische Börse München,

Freiverkehr in Niedersächsische Börse zu Hannover,

Prime Standard in Frankfurter Wertpapierbörse,

Regulierter Markt in Frankfurter Wertpapierbörse;

http://www.advaoptical.com (END) Dow Jones Newswires

   October 14, 2013 12:00 ET (16:00 GMT)- - 12 00 PM EDT 10-14-13