Company: GNMSF
Filing Date: 2025-12-12
Form Type: SC TO-T/A
Source: 0001193125-25-316835
Chunk: 0

Company: GENMAB A/S
Filing Date: 2025-12-12
Form: SC TO-T/A
Chunk 0
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SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO Tender Offer Statement Under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 (Amendment No. 3) MERUS N.V. (Name of Subject Company) GENMAB HOLDING II B.V. (Name of Filing Person (Offeror)) a wholly owned subsidiary of GENMAB A/S (Name of Filing Persons (Parent of Offeror)) Common Share, nominal value €0.09 per share (Title of Class of Securities) N5749R100 (CUSIP Number of Class of Securities) Greg Mueller Carl Jacobsens Vej 30 2500 Valby Denmark +45 70 20 27 28 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications on Behalf of Filing Persons) Copy to:

| Clare O’Brien                                  
 Derrick Lott                                   
 Harald                                         
 Halbhuber Allen Overy Shearman Sterling US LLP 
 599 Lexington Avenue New                       
 York, NY 10022 Telephone: +1 (212) 848-4000    |     | Christiaan de Brauw                    
 Olivier Valk Allen Overy               
 Shearman Sterling LLP Apollolaan 15    
 1077AB Amsterdam The                   
 Netherlands Telephone: +31 20 674 1000 |

| ☐ | Check the box if the filing relates solely to preliminary communications made before the commencement of a 
 tender offer.                                                                                              |

Check the appropriate boxes below to designate any transactions to which the statement relates:

| ☒ | third-party tender offer subject to Rule 14d-1. |

| ☐ | issuer tender offer subject to Rule 13e-4. |

| ☐ | going-private transaction subject to Rule 13e-3. |

| ☐ | amendment to Schedule 13D under Rule 13d-2. |

Check the following box if the filing is a final amendment reporting the results of the tender offer: ☐ If applicable, check the appropriate box(es) below to designate the appropriate rule provision(s) relied upon:

| ☐ | Rule 13e-4(i) (Cross-Border Issuer Tender Offer) |

| ☐ | Rule 14d-1(d) (Cross-Border Third-Party Tender Offer) |

This Amendment No. 3 to Tender Offer Statement on Schedule TO (this “Amendment No.