Notification of Major Holdings1. Details of issuer		Siltronic AG 	Hanns-Seidel-Platz 4 	81737 Munich 	Germany	 | 
2. Reason for notification	| X | 	Acquisition/disposal of shares with voting rights | 
	|   | 	Acquisition/disposal of instruments | 
	|   | 	Change of breakdown of voting rights | 
	| X | 	Other reason: Acting in Concert | 
3. Details of person subject to the notification obligation	| Name: | 	City and country of registered office: | 
	| J.P.Morgan Investment Management Inc. | 	Wilmington, Delaware United States of America (USA) | 
4. Names of shareholder(s)holding directly 3% or more voting rights, if different from 3.
5. Date on which threshold was crossed or reached:6. Total positions	|   | 	% of voting rights attached to shares  (total of 7.a.) | 	% of voting rights through instruments  (total of 7.b.1 + 7.b.2) | 	total of both in %  (7.a. + 7.b.) | 	total number of voting rights of issuer | 
	| Resulting situation | 	3.23 % | 	0.00 % | 	3.23 % | 	30000000 | 
	| Previous notification | 	2.95 % | 	0.00 % | 	2.95 % | 	/ | 
7. Notified details of the resulting situationa. Voting rights attached to shares (Sec.s 33, 34 WpHG)	| ISIN | 	absolute | 	in % | 
	|   | 	direct  (Sec. 33 WpHG) | 	indirect  (Sec. 34 WpHG) | 	direct  (Sec. 33 WpHG) | 	indirect  (Sec. 34 WpHG) | 
	| DE000WAF3001 | 	 | 	967994 | 	 % | 	3.23 % | 
	| Total | 	967994 | 	3.23 % | 	
b.1. Instruments according to Sec. 38 para. 1 No. 1 WpHG	| Type of instrument | 	Expiration or maturity date | 	Exercise or conversion period | 	Voting rights absolute | 	Voting rights in % | 
	 | 	 | 	 | 	 | 	 % | 
	|   | 	  | 	Total | 	 | 	 % | 
b.2. Instruments according to Sec. 38 para. 1 No. 2 WpHG	| Type of instrument | 	Expiration or maturity date | 	Exercise or conversion period | 	Cash or physical settlement | 	Voting rights absolute | 	Voting rights in % | 
	 | 	 | 	 | 	 | 	 | 	 % | 
	|   | 	  | 	  | 	Total | 	 | 	 % | 
8. Information in relation to the person subject to the notification obligation	| X | 	Person subject to the notification obligation is not controlled and does itself not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuer (1.). | 
	|   | 	Full chain of controlled undertakings starting with the ultimate controlling natural person or legal entity: | 
	| Name | 	% of voting rights (if at least held 3% or more) | 	% of voting rights through instruments (if at least held 5% or more) | 	Total of both (if at least held 5% or more) | 
	|   | 	 | 	 | 	 | 
9. In case of proxy voting according to Sec. 34 para. 3 WpHG	| Date of general meeting: | 	 | 
	| Holding position after general meeting: | 	 % (equals   voting rights) | 
10. Other explanatory remarks: