Theresa Heggie - 18 Mar 2026 Form 3 Insider Report for ProQR Therapeutics N.V. (PRQR)

Reporting relationship
Director
Issuer ticker
PRQR
Reported as of
18 Mar 2026
Net transaction value
$0
Source evidence Original filing metadata and source links for verification. 5 source fields
SEC form
3
Accepted by SEC
18 Mar 2026, 16:04:04 UTC
Prior SEC filing
15 Aug 2025
Next SEC filing
24 Mar 2026
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
/s/ Pieter Erik de Ridders, Attorney-in-Fact

Key filing fact

Theresa Heggie filed Form 3 for ProQR Therapeutics N.V. (PRQR) on 18 Mar 2026.

Key facts

  • This page summarizes Theresa Heggie's Form 3 filing for ProQR Therapeutics N.V. (PRQR).
  • 0 reported transactions and 10 derivative rows are listed below.
  • Accepted by SEC: 18 Mar 2026, 16:04.

Change

  • Previous filing in this sequence was filed on 15 Aug 2025.
  • Current net transaction value: $0.

Research use

  • This tells you what this filing adds before you inspect full transaction and derivative tables.
  • You can trace every row back to the original SEC filing document.

Evidence

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (1)

CIK 0001760020 Primary reporting owner

HEGGIE THERESA

Relationship
Director
Address
PROQR THERAPEUTICS N.V., ZERNIKEDREEF 9, LEIDEN, NETHERLANDS
Signature
/s/ Pieter Erik de Ridders, Attorney-in-Fact
Signature date
18 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

PRQR holding

Ordinary Shares

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
43,623
Date
18 Mar 2026
Ownership
Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

PRQR holding Derivative

Share Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 Mar 2026
Ownership
Direct
Underlying class
Ordinary Shares
Underlying amount
100,000
Exercise price
$6.73
Footnotes
F1
PRQR holding Derivative

Share Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 Mar 2026
Ownership
Direct
Underlying class
Ordinary Shares
Underlying amount
13,334
Exercise price
$9.10
Footnotes
F1
PRQR holding Derivative

Share Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 Mar 2026
Ownership
Direct
Underlying class
Ordinary Shares
Underlying amount
24,615
Exercise price
$9.91
Footnotes
F1
PRQR holding Derivative

Share Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 Mar 2026
Ownership
Direct
Underlying class
Ordinary Shares
Underlying amount
23,239
Exercise price
$4.20
Footnotes
F1
PRQR holding Derivative

Share Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 Mar 2026
Ownership
Direct
Underlying class
Ordinary Shares
Underlying amount
78,556
Exercise price
$1.02
Footnotes
F1
PRQR holding Derivative

Share Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 Mar 2026
Ownership
Direct
Underlying class
Ordinary Shares
Underlying amount
80,594
Exercise price
$0.6700
Footnotes
F1
PRQR holding Derivative

Share Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 Mar 2026
Ownership
Direct
Underlying class
Ordinary Shares
Underlying amount
14,418
Exercise price
$1.74
Footnotes
F2
PRQR holding Derivative

Share Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 Mar 2026
Ownership
Direct
Underlying class
Ordinary Shares
Underlying amount
23,489
Exercise price
$1.98
Footnotes
F3
PRQR holding Derivative

Share Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 Mar 2026
Ownership
Direct
Underlying class
Ordinary Shares
Underlying amount
22,128
Exercise price
$2.65
Footnotes
F4
PRQR holding Derivative

Share Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 Mar 2026
Ownership
Direct
Underlying class
Ordinary Shares
Underlying amount
25,192
Exercise price
$2.02
Footnotes
F5
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Fully vested.

Footnote F2

25% of the shares subject to such option vest and become exercisable on May 18, 2024, and the remaining 75% vest in 12 substantially equal quarterly installments thereafter, subject to the Reporting Person's continuous service to the Issuer on each such date.

Footnote F3

25% of the shares subject to such option vest and become exercisable on January 1, 2025, and the remaining 75% vest in 12 substantially equal quarterly installments thereafter, subject to the Reporting Person's continuous service to the Issuer on each such date.

Footnote F4

25% of the shares subject to such option vest and become exercisable on January 1, 2026, and the remaining 75% vest in 12 substantially equal quarterly installments thereafter, subject to the Reporting Person's continuous service to the Issuer on each such date.

Footnote F5

25% of the shares subject to such option vest and become exercisable on January 1, 2027, and the remaining 75% vest in 12 substantially equal quarterly installments thereafter, subject to the Reporting Person's continuous service to the Issuer on each such date.

SEC remarks

Exhibit 24 - Power of Attorney

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