GH Research PLC: Lynx1 Capital Management and Weston Nichols report beneficial ownership of 10,763,288 Ordinary Shares, representing 17.4% of the class. This percentage is calculated from 62,029,395 Ordinary Shares outstanding as of February 17, 2026, per the company's Form 20-F. The filing states the Lynx1 Fund holds the shares and has the right to receive dividends and sale proceeds.
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Insights
Large passive stake disclosed: 17.4% of outstanding shares.
The filing shows 10,763,288 shares held by the Lynx1 Fund and managed account, representing 17.4% of an issued base of 62,029,395 shares as of February 17, 2026. The figure combines previously reported holdings and an additional 1,306,666 shares on March 31, 2026.
Holder decisions will determine any future sales; the excerpt notes the Lynx1 Fund has the right to receive dividends or proceeds. Timing and planned dispositions are not stated in the provided excerpt.
Shared voting/dispositive power is disclosed; beneficial ownership is reported jointly.
The cover-page rows show shared voting power and shared dispositive power of 10,763,288 shares, attributed to Lynx1 and Mr. Weston Nichols in his capacity as the Investment Manager's representative. The filing includes a standard Section 13 statement disclaimer about beneficial ownership definitions.
Investors may watch subsequent filings for any Schedule 13D updates or Form 4/Form 5 disclosures that would indicate changes in intent or trading; the excerpt does not state any plans or sales.
Key Figures
Beneficial ownership:10,763,288 sharesPercent of class:17.4%Shares outstanding:62,029,395 shares+2 more
5 metrics
Beneficial ownership10,763,288 sharesReported beneficially owned as of March 31, 2026 (cover page combined totals)
Percent of class17.4%Calculated from 62,029,395 shares outstanding as of February 17, 2026
Shares outstanding62,029,395 sharesOutstanding as of <date>February 17, 2026</date> (Form 20-F citation)
"Amount beneficially owned: The information required by Item 4(a) is set forth"
Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.
CUSIPother
"CUSIP No.: G3855L106"
A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 7)
GH Research PLC
(Name of Issuer)
Ordinary Shares, nominal value $0.025 per share
(Title of Class of Securities)
G3855L106
(CUSIP Number)
03/31/2026
(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
10,763,288.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
10,763,288.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
10,763,288.00
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)
17.4 %
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
10,763,288.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
10,763,288.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
10,763,288.00
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)
17.4 %
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 62,029,395 Ordinary Shares outstanding as of February 17, 2026, as reported in the Company's Annual Report on Form 20-F for the period ended December 31, 2025, filed with the Securities and Exchange Commission on March 5, 2026.
The amount of Ordinary Shares set forth in rows (6), (8), and (9) of the cover page for each of the Reporting Persons includes 9,456,622 Ordinary Shares as previously reported on Schedule 13G for the quarterly period ending March 31, 2026, filed with the Securities Exchange Commission on May 15, 2026, plus an additional 1,306,666 Ordinary Shares also beneficially owned by the Reporting Persons on March 31, 2026.
(b)
Percent of class:
17.4%
(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
What stake does Lynx1 Capital report in GH Research (GHRS)?
Lynx1 Capital and Weston Nichols report beneficial ownership of 10,763,288 shares, equal to 17.4% of the class, based on 62,029,395 shares outstanding as of February 17, 2026.
How was the 17.4% ownership percentage calculated?
The percentage uses an aggregate of 62,029,395 Ordinary Shares outstanding as of February 17, 2026, as reported in the company’s Form 20-F filed March 5, 2026; shares owned equal 10,763,288.
Does Lynx1 have voting or dispositive power over the GHRS shares?
The filing reports shared voting power and shared dispositive power of 10,763,288 shares for the Reporting Persons; sole voting and sole dispositive power are reported as 0 on the cover page.
Are the shares held directly or on behalf of another person?
The shares are held by the Lynx1 Fund and a managed account; the filing states the Lynx1 Fund has the right to receive dividends and proceeds from the reported Ordinary Shares.
Did the filing disclose any planned sales or purchases of GHRS shares?
No planned sales or purchases are disclosed in the provided excerpt; the statement reports current beneficial ownership and notes the Fund's right to dividends and proceeds without stating any transaction plans.
