Lynx1 Capital Management (NASDAQ: GHRS) reports 19.3% stake in GH Research

Rhea-AI Filing Summary

Lynx1 Capital Management LP and Weston Nichols report beneficial ownership of GH Research PLC ordinary shares. Through Lynx1 Master Fund LP and a managed account, they collectively report 13,263,288 Ordinary Shares, representing 19.3% of the class, with shared voting and dispositive power and no sole power. The ownership percentage is based on 68,608,919 Ordinary Shares outstanding as of May 12, 2026, as reported by the company. The Lynx1 Fund has the right to receive dividends and sale proceeds from the reported shares.

Key Figures

Shares beneficially owned: 13,263,288 Ordinary Shares Percent of class owned: 19.3% Shares outstanding: 68,608,919 Ordinary Shares +2 more

5 metrics

Shares beneficially owned 13,263,288 Ordinary Shares Beneficial ownership reported by Lynx1 Capital Management LP and Weston Nichols

Percent of class owned 19.3% Portion of GH Research PLC ordinary shares beneficially owned

Shares outstanding 68,608,919 Ordinary Shares Shares outstanding as of May 12, 2026 used to calculate ownership percentage

Shared voting power 13,263,288 Ordinary Shares Shares over which the Reporting Persons have shared power to vote or direct the vote

Shared dispositive power 13,263,288 Ordinary Shares Shares over which the Reporting Persons have shared power to dispose or direct disposition

Key Terms

beneficial owner, shared voting power, shared dispositive power, Schedule 13

4 terms

beneficial owner financial

"the beneficial owner of the securities reported herein"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

shared voting power financial

"Shared Voting Power 13,263,288.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

shared dispositive power financial

"Shared Dispositive Power 13,263,288.00"

Schedule 13 regulatory

"for the purposes of Section 13 of the Securities Exchange Act of 1934"

FAQ

What percentage of GHRS does Lynx1 Capital Management report owning?

Lynx1 Capital Management and Weston Nichols report beneficial ownership of 19.3% of GH Research PLC’s ordinary shares, based on 68,608,919 shares outstanding as of May 12, 2026, as disclosed in the company’s Form F-3.

How many GHRS shares are beneficially owned by Lynx1 Capital Management and Weston Nichols?

They report beneficial ownership of 13,263,288 GH Research PLC ordinary shares. These shares are held through Lynx1 Master Fund LP and a managed account, with shared voting and shared dispositive power over the reported position.

Does Lynx1 Capital Management have sole or shared voting power over GHRS shares?

They report 0 shares with sole voting power and 13,263,288 shares with shared voting power. They likewise report no sole dispositive power and shared dispositive power over the same number of ordinary shares.

On whose behalf are the GHRS shares held by Lynx1 Capital Management?

The ordinary shares are held for Lynx1 Master Fund LP and a managed account. The filing states the Lynx1 Fund has the right to receive dividends and the proceeds from the sale of the reported ordinary shares.

How was Lynx1’s GHRS ownership percentage of 19.3% calculated?

The 19.3% figure is calculated using 68,608,919 GH Research PLC ordinary shares outstanding as of May 12, 2026, as reported in the company’s registration statement on Form F-3 filed on May 14, 2026.

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Available on EDGAR 08/14/2026 - 04:34 PM Accepted by SEC EDGAR 08/14/2026 - 04:30 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 8)

GH Research PLC

(Name of Issuer)

Ordinary Shares, nominal value $0.025 per share

(Title of Class of Securities)

G3855L106

(CUSIP Number)

06/30/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): G3855L106

1

Names of Reporting Persons

Lynx1 Capital Management LP

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 13,263,288.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 13,263,288.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

13,263,288.00

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)

19.3 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP Number(s): G3855L106

1

Names of Reporting Persons

Weston Nichols

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 13,263,288.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 13,263,288.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

13,263,288.00

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)

19.3 %

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 L2, D02 RY95, Ireland
Item 2.
(a)	Name of person filing: This statement is filed by: (i) Lynx1 Capital Management LP (the "Investment Manager"), a Delaware limited partnership, and the investment manager to Lynx1 Master Fund LP (the "Lynx1 Fund") and a managed account, with respect to the ordinary shares, nominal value $0.025 per share ("Ordinary Shares"), of GH Research PLC, an Irish public limited company (the "Company"), directly held by the Lynx1 Fund and the managed account; and (ii) Mr. Weston Nichols ("Mr. Nichols"), the sole member of Lynx1 Capital Management GP LLC, the general partner of the Investment Manager, with respect to the Ordinary Shares directly held by the Lynx1 Fund and the managed account. The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons." The filing of this statement should not be construed as an admission that any of the foregoing persons or any Reporting Person is, for the purposes of Section 13 of the Securities Exchange Act of 1934, the beneficial owner of the securities reported herein.
(b)	Address or principal business office or, if none, residence: Lynx1 Capital Management LP D81 Calle C Suite 301, PMB 1202 Dorado, PR, 00646-2051 Weston Nichols c/o Lynx1 Capital Management LP D81 Calle C Suite 301, PMB 1202 Dorado, PR, 00646-2051
(c)	Citizenship: Investment Manager - Delaware Mr. Nichols - United States of America
(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: The information required by Item 4(a) is set forth in Row 9 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The percentage set forth in this Schedule 13G is calculated based upon an aggregate of 68,608,919 Ordinary Shares outstanding as of May 12, 2026, as reported in the Company's registration statement on Form F-3, filed with the Securities and Exchange Commission on May 14, 2026.
(b)	Percent of class: 19.3%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
	(ii) Shared power to vote or to direct the vote: The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
	(iii) Sole power to dispose or to direct the disposition of: The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
	(iv) Shared power to dispose or to direct the disposition of: The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. See Item 2(a). The Lynx1 Fund has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Ordinary Shares reported herein.
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:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

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.

Lynx1 Capital Management LP

Signature:	/s/ Weston Nichols
Name/Title:	By: Lynx1 Capital Management GP LLC, General Partner, By: Weston Nichols, Sole Member
Date:	08/14/2026

Weston Nichols

Signature:	/s/ Weston Nichols
Name/Title:	Weston Nichols, Individually
Date:	08/14/2026