REPORT PURSUANT TO SECTION 28a OF THE DANISH SECURITIES TRADING ACT

Copenhagen, Denmark; May 5, 2008 -Pursuant to Section 28a of the Danish Securities Trading Act, Genmab A/S (OMX: GEN) shall make public information on transactions by managerial employees and their related parties involving Genmab shares and related instruments, as follows:

Name

Ernst Schweizer

Reason

Board Member

Issuer

Genmab A/S

ID code/ ISIN

DK 0010272202

Description

Shares

Transaction

Sale

Trading date

April 29, 2008

Market

OMX The Nordic Exchange Copenhagen A/S

Number

10,000

Market value

DKK 2,635,049.90

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