Insider Disclosure: Theis Terwey Holds 7.6% of GH Research (GHRS)

Rhea-AI Filing Summary

Terwey Theis reports beneficial ownership of 4,692,903 ordinary shares of GH Research PLC, representing 7.6% of the outstanding class based on 62,029,395 shares outstanding as of June 30, 2025. The disclosure shows the reporting person is a German citizen and holds sole voting and sole dispositive power over all reported shares, with no shared voting or dispositive arrangements.

This Schedule 13G amendment documents a substantial ownership position above the 5% threshold that requires public disclosure; it does not specify transactions, motives, or any arrangements with other holders.

Positive

• Beneficial ownership above 5%: 4,692,903 shares representing 7.6% of the class (material disclosure)
• Sole voting and dispositive power over all reported shares, indicating clear, individual control of the position

Negative

• Concentration risk: a single holder with sole voting and dispositive authority could exert outsized influence
• No transactional detail provided, so the filing does not clarify whether the position is increasing, decreasing, or strategic

Insights

Securities Analyst

TL;DR: A disclosed 7.6% stake with sole voting and dispositive power is material but neutral absent transactional context.

Theis Terwey's 4.69 million-share holding crosses the reporting threshold and is therefore material for investors to monitor. Sole voting and dispositive authority indicates direct control over disposition and voting of these shares, which can affect shareholder votes or potential block trades. The filing contains no indication of coordinated group activity, acquisitions, or changes to the position, so the immediate market impact is informational rather than transactional.

Corporate Governance Expert

TL;DR: Concentrated, disclosed stake with sole control raises governance relevance but provides no signal on intent.

A 7.6% ownership stake with exclusive voting and dispositive power is governance-relevant because it concentrates influence in a single holder. That concentration could shape corporate votes or strategic outcomes if exercised, yet the filing does not reveal any plans to engage with management or propose changes. Without evidence of an activist intent or coordinated group, the disclosure is a routine material ownership update.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

GH Research PLC

(Name of Issuer)

Ordinary shares, nominal value $0.025 per share

(Title of Class of Securities)

G3855L106

(CUSIP Number)

06/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. G3855L106

1

Names of Reporting Persons

Terwey Theis H

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

GERMANY

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 4,692,903.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 4,692,903.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,692,903.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.6 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: GH Research PLC
(b)	Address of issuer's principal executive offices: Joshua Dawson House, Dawson Street, DUBLIN 2, IRELAND, D02 RY95
Item 2.
(a)	Name of person filing: Theis Terwey
(b)	Address or principal business office or, if none, residence: c/o n.cour projects GmbH, Torstrasse 105-107, 10119 Berlin, Germany
(c)	Citizenship: Germany
(d)	Title of class of securities: Ordinary shares, nominal value $0.025 per share
(e)	CUSIP No.: G3855L106
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 4,692,903
(b)	Percent of class: 7.6. The calculation of the percentage of Ordinary Shares beneficially owned assumes 62,029,395 Ordinary Shares outstanding as of June 30, 2025
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 4,692,903
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 4,692,903
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.	Certifications:
	Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Terwey Theis H

Signature:	/s/ Theis Terwey
Name/Title:	Theis Terwey
Date:	08/14/2025

FAQ

Who filed the Schedule 13G/A for GH Research (GHRS)?

The Schedule 13G/A was filed by Theis Terwey, a citizen of Germany, as the reporting person.

How many GH Research (GHRS) shares does the reporting person own?

The reporting person beneficially owns 4,692,903 shares of GH Research ordinary shares.

What percentage of GH Research (GHRS) does this holding represent?

The position represents 7.6% of the outstanding ordinary shares, based on 62,029,395 shares outstanding as of June 30, 2025.

Does the filer share voting or dispositive power over these GHRS shares?

No. The filer reports sole voting power and sole dispositive power over all 4,692,903 shares and reports no shared power.

Does the filing indicate holdings on behalf of another person or a group?

No. The filing states not applicable for holdings on behalf of another person and no group membership is identified.