Novonesis AS

Transaction in Own Shares • May 13, 2011

May 13, 2011

On February 11, 2011, Novozymes initiated a share buyback program in accordance with the provisions of European Commission Regulation no. 2273/2003 of December 22, 2003, also referred to as the Safe Harbour Regulation.

Under the program Novozymes will buy back B shares for an amount of up to DKK 400 million in the period from February 11, 2011, to December 31, 2011.

The following transactions have been made under the program:

	Number of shares	Average purchase price	Transaction value, DKK
Accumulated, last announcement	161,468		128,529,750
May 06, 2011	0		0
May 09, 2011	0		0
May 10, 2011	8,769	882.04	7,734,609
May 11, 2011	0		0
May 12, 2011	4,580	877.98	4,021,148
Accumulated under the program	174,817		140,285,507

Transactions related to Novozymes' incentive programs have resulted in a net sale by Novozymes of 47,411 B shares in the period from May 6 to May 12. The shares related to these transactions were not part of the Safe Harbour share buyback program.

With the transactions stated above, Novozymes owns a total of 1,885,354 treasury shares, corresponding to 2.9% of the share capital. The total amount of shares in the company is 65,000,000, including treasury shares.

Contact persons:

René Tronborg (Europe) Tel. (direct): +45 4446 2274 Tel. (mobile): +45 3077 2274

Paige Donnelly (USA) Tel. (direct): +1 919 494 3209 Tel. (mobile): +1 919 218 4501

Press and media: Investor relations:

Tobias Bjorklund Tel. (direct): +45 4446 8682 Tel. (mobile): +45 3077 8682

Martin Riise Nielsen Tel. (direct): +45 4446 0738 Tel. (mobile): +45 3077 0738

Thomas Bomhoff (USA) Tel. (direct): +1 919 494 3483 Tel. (mobile): +1 919 649 2565

Novozymes is the world leader in bioinnovation. Together with customers across a broad array of industries we create tomorrow's industrial biosolutions, improving our customers' business and the use of our planet's resources. Read more at www.novozymes.com.

Company announcement no. 28, 2011 Page 1 of 1 Novozymes A/S Investor Relations Krogshoejvej 36 2880 Bagsvaerd Denmark

Telephone: +45 4446 0000 Fax: +45 4446 9999 Internet: www.novozymes.com CVR number: 10 00 71 27