NASDAQ OMX Copenhagen A/S 06.05.2010 Nikolaj Plads 6 1067 København K No. 12/10 Report on insider transactions with shares issued by Topsil Semiconductor Materials A/S Pursuant to section 28a of the Danish Securities Trading Act we can report the following transactions based on today's reports from insiders: Name: Theis Leth Sveigaard Reason: Expansion & R&D Manager Issuer: Topsil Semiconductor Materials Trading date: 5 May 2010 Market: NASDAQ OMX Copenhagen ID-code: DK 0060220812 Type: Preemptive rights Transaction: Sales Number: 1 Market value DKK: 0.17 ID-code: DK 0060221034 Type: New shares Transaction: Purchase (subscription of new shares) Number: 127,973 Market value DKK: 115,175.70 Name: Hans Peder Mikkelsen Reason: Supply Chain Manager Issuer: Topsil Semiconductor Materials Trading date: 6 May 2010 Market: NASDAQ OMX Copenhagen ID-code: DK 0060220812 Type: Preemptive rights Transaction: Sales Number: 144,831 Market value DKK: 23,172.96 ID-code: DK 0060221034 Type: New shares Transaction: Purchase (subscription of new shares) Number: 200,000 Market value DKK: 180,000 Topsil Semiconductor Materials A/S Jens Borelli-Kjær Keld Lindegaard Andersen Chairman CEO +45 40 16 14 82 +45 21 70 87 72 Please note that this translation is provided for convenience only. The Danish version shall prevail in case of discrepancies.