ProQR (PRQR) CEO Daniel de Boer purchases 150,000 Ordinary Shares at $1.59

Rhea-AI Filing Summary

ProQR Therapeutics N.V. reported that Chief Executive Officer Daniel Anton de Boer bought Ordinary Shares in the company. On July 7, 2026, he made an open-market purchase of 150,000 Ordinary Shares at $1.59 per share. After this transaction, he directly owns 150,000 Ordinary Shares, indicating this was a new position or a reset position as reflected in this filing.

Insider Trade Summary

Net Buyer: 150,000 shares ($238,500)

Net Buy 1 txn

Insider de Boer Daniel Anton

Role Chief Executive Officer

Bought 150,000 shs ($239K)

Type	Security	Shares	Price	Value
Purchase	Ordinary Shares	150,000	$1.59	$239K

Holdings After Transaction: Ordinary Shares — 150,000 shares (Direct, null)

Footnotes (1)

Key Figures

Shares purchased: 150,000 shares Purchase price: $1.59 per share Shares owned after transaction: 150,000 shares

3 metrics

Shares purchased 150,000 shares Ordinary Shares bought in open-market transaction on July 7, 2026

Purchase price $1.59 per share Price paid for Ordinary Shares on July 7, 2026

Shares owned after transaction 150,000 shares Total direct ownership following the July 7, 2026 purchase

Key Terms

open-market purchase, Ordinary Shares, transaction code "P"

3 terms

open-market purchase financial

"transaction_action: "open-market purchase""

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

Ordinary Shares financial

"security_title: "Ordinary Shares""

Ordinary shares are a type of ownership stake in a company, giving shareholders a right to participate in the company’s profits and decision-making through voting. They are similar to owning a piece of a business, and their value can rise or fall based on the company's performance. Investors buy ordinary shares to potentially earn dividends and benefit from the company's growth over time.

transaction code "P" regulatory

"transaction_code: "P" indicating a purchase"

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/08/2026 - 02:55 PM Accepted by SEC EDGAR 07/08/2026 - 02:55 PM Learn about SEC filing dates

FAQ

What insider transaction did ProQR (PRQR) report in this Form 4?

ProQR reported that CEO Daniel Anton de Boer executed an open-market purchase of 150,000 Ordinary Shares. The transaction occurred on July 7, 2026, at a price of $1.59 per share, and reflects a direct ownership position after the trade.

How many ProQR (PRQR) shares did the CEO buy and at what price?

The CEO bought 150,000 ProQR Ordinary Shares at $1.59 per share. This open-market purchase, disclosed in the Form 4, established or reset his directly held position to 150,000 shares following the transaction on July 7, 2026.

What is Daniel Anton de Boer’s ProQR shareholding after the reported trade?

After the reported trade, Daniel Anton de Boer directly holds 150,000 Ordinary Shares of ProQR. The filing shows that all 150,000 shares were acquired in this open-market purchase and that his total direct ownership equals the amount bought in the transaction.

Was the ProQR (PRQR) insider transaction a purchase or a sale?

The insider transaction was a purchase. The Form 4 identifies a transaction code “P” and describes it as an open-market purchase, with the CEO buying 150,000 Ordinary Shares at $1.59 per share and holding that full amount afterward as direct ownership.

Did the ProQR CEO use derivatives or options in this Form 4 transaction?

No, this Form 4 shows only a non-derivative transaction in Ordinary Shares. The CEO bought 150,000 shares directly in the open market at $1.59 per share, and the filing reports no accompanying derivative positions or option exercises related to this trade.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

de Boer Daniel Anton

(Last) (First) (Middle)

PROQR THERAPEUTICS N.V.

ZERNIKEDREEF 9

(Street)

LEIDEN 2333 CK

(City) (State) (Zip)

NETHERLANDS

(Country)

2. Issuer Name and Ticker or Trading Symbol
ProQR Therapeutics N.V. [ PRQR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

2a. Foreign Trading Symbol
[[N/A]]

3. Date of Earliest Transaction (Month/Day/Year)
07/07/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares	07/07/2026		P		150,000	A	$1.59	150,000	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Pieter Erik de Ridders, Attorney-in-Fact	07/08/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)