NASDAQ OMX Copenhagen A/S 05.05.2010 Nikolaj Plads 6 1067 København K No. 11/10 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: Jørgen Bødker Reason: VP Sales & Marketing Issuer: Topsil Semiconductor Materials Trading date: 4 May 2010 Market: NASDAQ OMX Copenhagen ID-code: DK 0060220812 Type: Preemptive rights Transaction: Purchase Number: 3 Market value DKK: 0.55 ID-code: DK 0060221034 Type: New shares Transaction: Purchase (subscription of new shares) Number: 583,132 Market value DKK: 524,818.80 Name: Jens Christian Nielsen Reason: CFO Issuer: Topsil Semiconductor Materials ID-code: DK 0060221034 Type: New shares Transaction: Purchase (subscription of new shares) Trading date: 4 May 2010 Market: NASDAQ OMX Copenhagen Number: 25,000 Market value DKK: 22,500 Name: Hans Peder Mikkelsen Reason: Supply Chain Manager Issuer: Topsil Semiconductor Materials ID-code: DK 0010271584 Type: Shares Transaction: Sales Trading date: 4 May 2010 Market: NASDAQ OMX Copenhagen Number: 120,000 Market value DKK: 196,800 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.