Report of Foreign Issuer (6-k)

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16 of the
Securities Exchange Act of 1934

Commission File No. 000-51196

For the month of June 2015

AIXTRON SE
(Translation of registrant’s name into English)

Dornkaulstr. 2
52134 Herzogenrath
Germany
(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ⊠

Form 40-F ⃞

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ⃞

No ⊠

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): N/A

AIXTRON SE: Release according to Article 26, Section 1 of the WpHG [the German Securities Trading Act] with the objective of Europe-wide distribution

On June 24, 2015, UBS Group AG, Zurich, Switzerland has informed us according to Article 21, Section 1 of the WpHG that via shares its Voting Rights on AIXTRON SE, Herzogenrath, Germany, have fallen below the 5% threshold of the Voting Rights on June 19, 2015 and on that day amounted to 4.99% (this corresponds to 5624525 Voting Rights). 4.99% of Voting Rights (this corresponds to 5624525 Voting Rights) are attributed to the company in accordance with Article 22, Section 1, Sentence 1, No. 1 of the WpHG (German Securities Trading Act). Attributed Voting Rights are held by the following companies under its control, whose share of the Voting Rights in AIXTRON SE amounts to 3 percent or more: UBS AG.

Furthermore, on June 24, 2015, UBS AG, Zurich, Switzerland has informed us according to Article 21, Section 1 of the WpHG that via shares its Voting Rights on AIXTRON SE, Herzogenrath, Germany, have fallen below the 5% threshold of the Voting Rights on June 19, 2015 and on that day amounted to 4.99% (this corresponds to 5624525 Voting Rights). 1.01% of Voting Rights (this corresponds to 1135032 Voting Rights) are attributed to the company in accordance with Article 22, Section 1, Sentence 1, No. 1 of the WpHG (German Securities Trading Act).

Furthermore, on June 26, 2015, UBS Group AG, Zurich, Switzerland has informed us according to Article 21, Section 1 of the WpHG that via shares its Voting Rights on AIXTRON SE, Herzogenrath, Germany, have exceeded the 5% threshold of the Voting Rights on June 22, 2015 and on that day amounted to 5.005% (this corresponds to 5640715 Voting Rights). 5.005% of Voting Rights (this corresponds to 5640715 Voting Rights) are attributed to the company in accordance with Article 22, Section 1, Sentence 1, No. 1 of the WpHG (German Securities Trading Act). Attributed Voting Rights are held by the following companies under its control, whose share of the Voting Rights in AIXTRON SE amounts to 3 percent or more: UBS AG.

Furthermore, on June 26, 2015, UBS AG, Zurich, Switzerland has informed us according to Article 21, Section 1 of the WpHG that via shares its Voting Rights on AIXTRON SE, Herzogenrath, Germany, have exceeded the 5% threshold of the Voting Rights on June 22, 2015 and on that day amounted to 5.005% (this corresponds to 5640715 Voting Rights). 1.01% of Voting Rights (this corresponds to 1134962 Voting Rights) are attributed to the company in accordance with Article 22, Section 1, Sentence 1, No. 1 of the WpHG (German Securities Trading Act).

Furthermore, on June 26, 2015, UBS Group AG, Zurich, Switzerland has informed us according to Article 21, Section 1 of the WpHG that via shares its Voting Rights on AIXTRON SE, Herzogenrath, Germany, have fallen below the 5% threshold of the Voting Rights on June 24, 2015 and on that day amounted to 4.997% (this corresponds to 5631266 Voting Rights). 4.997% of Voting Rights (this corresponds to 5631266 Voting Rights) are attributed to the company in accordance with Article 22, Section 1, Sentence 1, No. 1 of the WpHG (German Securities Trading Act). Attributed Voting Rights are held by the following companies under its control, whose share of the Voting Rights in AIXTRON SE amounts to 3 percent or more: UBS AG.

Furthermore, on June 26, 2015, UBS AG, Zurich, Switzerland has informed us according to Article 21, Section 1 of the WpHG that via shares its Voting Rights on AIXTRON SE, Herzogenrath, Germany, have fallen below the 5% threshold of the Voting Rights on June 24, 2015 and on that day amounted to 4.997% (this corresponds to 5631266 Voting Rights). 1.02% of Voting Rights (this corresponds to 1153575 Voting Rights) are attributed to the company in accordance with Article 22, Section 1, Sentence 1, No. 1 of the WpHG (German Securities Trading Act).

Furthermore, we received the following notification pursuant to Art. 25a, Sec. 1 WpHG on June 24, 2015:

1. Listed company: AIXTRON SE, Dornkaulstraße 2, 52134 Herzogenrath, Germany

2. Notifier: UBS Group AG, Zurich, Switzerland

3. Triggering event: Falling below threshold

4. Threshold(s) crossed or reached: 10%

5. Date at which the threshold is crossed or reached: 18.06.2015

6. Total amount of voting rights: 9.95% (equals 11208883 voting rights) calculated from the following total number of voting rights issued: 112701905

7. Detailed information on the voting rights proportion:

Voting rights proportion based on financial/other instruments pursuant to Art. 25a, Sec. 1 WpHG: 3.94% (equals 4440811 voting rights) thereof held indirectly: 3.94% (equals 4440811 voting rights)

Voting rights proportion based on financial/other instruments pursuant to Art. 25 WpHG: 0.94% (equals 1058131 voting rights) thereof held indirectly: 0.94% (equals 1058131 voting rights)

Voting rights pursuant to Art. 21, 22 WpHG: 5.07% (equals 5709941 voting rights)

8. Detailed information on financial/other instruments pursuant to Art.
25a, Sec. 1 WpHG:

Chain of controlled undertakings: UBS AG

ISIN or name/description of the financial/other instrument: Physically Settled Put Option, Expiration date: 19.06.2015

ISIN or name/description of the financial/other instrument: Equity Swap, Expiration date: 06.06.2016

ISIN or name/description of the financial/other instrument: Equity Swap, Expiration date: 30.09.2016

ISIN or name/description of the financial/other instrument: Equity Swap, Expiration date: 08.12.2016

ISIN or name/description of the financial/other instrument: Equity Swap, Expiration date: 20.12.2016

ISIN or name/description of the financial/other instrument: Equity Swap, Expiration date: 27.03.2017

ISIN or name/description of the financial/other instrument: Equity Swap, Expiration date: 13.07.2017

ISIN or name/description of the financial/other instrument: Equity Swap, Expiration date: 01.08.2017

ISIN or name/description of the financial/other instrument: Equity Swap, Expiration date: 03.11.2017

ISIN or name/description of the financial/other instrument: Equity Swap, Expiration date: 05.02.2018

ISIN or name/description of the financial/other instrument: Equity Swap, Expiration date: 19.03.2018

ISIN or name/description of the financial/other instrument: Equity Swap, Expiration date: 19.07.2017

ISIN or name/description of the financial/other instrument: Equity Swap, Expiration date: 02.12.2016

ISIN or name/description of the financial/other instrument: Equity Swap, Expiration date: 13.12.2016