SCHEDULE 13D/A

ProQR Therapeutics NV

Ordinary Shares, nominal value Euro 0.04 per share · CUSIP: N71542109

Event date: 2026-02-05

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Van Herk Investments B.V.Reported CIK 0001633120

  Shares: 15,384,250.00 · Class: 14.6%

• Van Herk Investments THI B.V.

  Shares: 15,384,250.00 · Class: 14.6%

• Van Herk Private Equity Investments B.V.

  Shares: 15,384,250.00 · Class: 14.6%

• Stichting Administratiekantoor Penulata

  Shares: 15,384,250.00 · Class: 14.6%

• Van Herk Management Services B.V.

  Shares: 15,384,250.00 · Class: 14.6%

• Onroerend Goed Beheer- en Beleggingsmaatschappij A. van Herk B.V.

  Shares: 15,384,250.00 · Class: 14.6%

• A. van Herk Holding B.V.

  Shares: 15,384,250.00 · Class: 14.6%

• Stichting Administratiekantoor Abchrys

  Shares: 15,384,250.00 · Class: 14.6%

• Adrianus van Herk

  Shares: 15,384,250.00 · Class: 14.6%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.