Copenhagen, Denmark; June 4, 2007 – Pursuant to Section 28a of the Danish Securities Trading Act, Genmab A/S (CSE: GEN) shall make public information on transactions by managerial employees and their related parties involving Genmab shares and related instruments, as follows:

Name:  Ernst H. Schweizer

Reason: Member of Board of Directors

Issuer: Genmab A/S

ID code/ ISIN: DK 0010272202

Description: Shares

Transaction: Sale

Trading date: June 1, 2007

Market: Copenhagen Stock Exchange

Number: 18,875

Market value: DKK 7,550,000