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Form SCHEDULE 13D/A ProQR Therapeutics N.V. Filed by: VAN HERK INVESTMENTS B.V.

June 3, 2026 5:25 PM





If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).




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SCHEDULE 13D




Comment for Type of Reporting Person:
Row 13- Based on 105,362,551 ordinary shares, nominal value Euro 0.04 per share, of ProQR Therapeutics N.V. (the "Issuer") issued and outstanding as of March 31, 2026, as reported in the Issuer's Form 6-K filed with the SEC on May 12, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
Row 13- Based on 105,362,551 ordinary shares, nominal value Euro 0.04 per share, of the Issuer issued and outstanding as of March 31, 2026, as reported in the Issuer's Form 6-K filed with the SEC on May 12, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
Row 13- Based on 105,362,551 ordinary shares, nominal value Euro 0.04 per share, of the Issuer issued and outstanding as of March 31, 2026, as reported in the Issuer's Form 6-K filed with the SEC on May 12, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
Row 13- Based on 105,362,551 ordinary shares, nominal value Euro 0.04 per share, of the Issuer issued and outstanding as of March 31, 2026, as reported in the Issuer's Form 6-K filed with the SEC on May 12, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
Row 13- Based on 105,362,551 ordinary shares, nominal value Euro 0.04 per share, of the Issuer issued and outstanding as of March 31, 2026, as reported in the Issuer's Form 6-K filed with the SEC on May 12, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
Row 13- Based on 105,362,551 ordinary shares, nominal value Euro 0.04 per share, of the Issuer issued and outstanding as of March 31, 2026, as reported in the Issuer's Form 6-K filed with the SEC on May 12, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
Row 13- Based on 105,362,551 ordinary shares, nominal value Euro 0.04 per share, of the Issuer issued and outstanding as of March 31, 2026, as reported in the Issuer's Form 6-K filed with the SEC on May 12, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
Row 13- Based on 105,362,551 ordinary shares, nominal value Euro 0.04 per share, of the Issuer issued and outstanding as of March 31, 2026, as reported in the Issuer's Form 6-K filed with the SEC on May 12, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
Row 13- Based on 105,362,551 ordinary shares, nominal value Euro 0.04 per share, of the Issuer issued and outstanding as of March 31, 2026, as reported in the Issuer's Form 6-K filed with the SEC on May 12, 2026.


SCHEDULE 13D


Van Herk Investments B.V.
Signature:/s/ Erik G.A. Esveld
Name/Title:Erik G.A. Esveld/Attorney-In-Fact*
Date:06/03/2026
Van Herk Investments THI B.V.
Signature:/s/ Erik G.A. Esveld
Name/Title:Erik G.A. Esveld/Attorney-In-Fact*
Date:06/03/2026
Van Herk Private Equity Investments B.V.
Signature:/s/ Erik G.A. Esveld
Name/Title:Erik G.A. Esveld/Attorney-In-Fact*
Date:06/03/2026
Stichting Administratiekantoor Penulata
Signature:/s/ Erik G.A. Esveld
Name/Title:Erik G.A. Esveld/Attorney-In-Fact*
Date:06/03/2026
Van Herk Management Services B.V.
Signature:/s/ Erik G.A. Esveld
Name/Title:Erik G.A. Esveld/Attorney-In-Fact*
Date:06/03/2026
Onroerend Goed Beheer- en Beleggingsmaatschappij A. van Herk B.V.
Signature:/s/ Erik G.A. Esveld
Name/Title:Erik G.A. Esveld/Attorney-In-Fact*
Date:06/03/2026
A. van Herk Holding B.V.
Signature:/s/ Erik G.A. Esveld
Name/Title:Erik G.A. Esveld/Attorney-In-Fact*
Date:06/03/2026
Stichting Administratiekantoor Abchrys
Signature:/s/ Erik G.A. Esveld
Name/Title:Erik G.A. Esveld/Attorney-In-Fact*
Date:06/03/2026
Adrianus van Herk
Signature:/s/ Erik G.A. Esveld
Name/Title:Erik G.A. Esveld/Attorney-In-Fact*
Date:06/03/2026
Comments accompanying signature:
* Pursuant to a Power of Attorney, dated as of September 16, 2019, by and among the Reporting Persons.

ATTACHMENTS / EXHIBITS

EXHIBIT 99.1

Categories

SEC Filings