# EDGAR Filing Document

**Accession Number:** 0001909586
**File Stem:** 0000950103-23-002172
**Filing Date:** 2023-2
**Character Count:** 8630
**Document Hash:** b6a41b72d5b1cc56afb582ac6f013619
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950103-23-002172.hdr.sgml**: 20230210

**ACCESSION NUMBER**: 0000950103-23-002172

**CONFORMED SUBMISSION TYPE**: SC 13G/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230210

**DATE AS OF CHANGE**: 20230210

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** GH Research PLC
- **CENTRAL INDEX KEY:** 0001855129
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** L2
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-92661
- **FILM NUMBER:** 23612640

**BUSINESS ADDRESS:**
- **STREET 1:** 28 BAGGOT STREET
- **CITY:** LOWER DUBLIN
- **STATE:** L2
- **ZIP:** 2D02 NX43
- **BUSINESS PHONE:** 353 1 437 8334

**MAIL ADDRESS:**
- **STREET 1:** 28 BAGGOT STREET
- **CITY:** LOWER DUBLIN
- **STATE:** L2
- **ZIP:** 2D02 NX43
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Terwey Theis H
- **CENTRAL INDEX KEY:** 0001909586

**FILING VALUES:**
- **FORM TYPE:** SC 13G/A

**MAIL ADDRESS:**
- **STREET 1:** 28 BAGGOT STREET LOWER
- **CITY:** DUBLIN 2
- **STATE:** L2
- **ZIP:** D02 NX43

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**SCHEDULE 13G/A**

**(Rule 13d-102)** 

**Information Statement Pursuant to Rules 13d-1 and 13d-2**

**Under the Securities Exchange Act of 1934**

**(Amendment No. 1)\*** 

**GH RESEARCH PLC**

**(Name of Issuer)** 

**Ordinary shares, nominal value $0.025 per share** 

**(Title of Class of Securities)** 

**G3855L106**

**(CUSIP Number)** 

**December 31, 2022**

**(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)

\* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

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|:---|:---|:---|
| CUSIP No. G3855L106 | **13G/A** | Page 2 of 6 Pages |

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| | | | |
|:---|:---|:---|:---|
| 1 | NAME OF REPORTING PERSON<br>Theis Terwey | NAME OF REPORTING PERSON<br>Theis Terwey | NAME OF REPORTING PERSON<br>Theis Terwey |
| 2 | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP\*<br>(a) ☐ (b) ☐ | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP\*<br>(a) ☐ (b) ☐ | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP\*<br>(a) ☐ (b) ☐ |
| 3 | SEC USE ONLY | SEC USE ONLY | SEC USE ONLY |
| 4 | CITIZENSHIP OR PLACE OF ORGANIZATION<br>Germany | CITIZENSHIP OR PLACE OF ORGANIZATION<br>Germany | CITIZENSHIP OR PLACE OF ORGANIZATION<br>Germany |
| NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | 5 | SOLE VOTING POWER<br>6,188,070 Ordinary Shares<br>|
| NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | 6 | SHARED VOTING POWER<br>0<br>|
| NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | 7 | SOLE DISPOSITIVE POWER<br>6,188,070 Ordinary Shares<br>|
| NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | 8 | SHARED DISPOSITIVE POWER<br>0<br>|
| 9 | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>6,188,070 Ordinary Shares | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>6,188,070 Ordinary Shares | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>6,188,070 Ordinary Shares |
| 10 | CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ☐ | CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ☐ | CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ☐ |
| 11 | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>11.9% (1) | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>11.9% (1) | PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>11.9% (1) |
| 12 | TYPE OF REPORTING PERSON<br>IN | TYPE OF REPORTING PERSON<br>IN | TYPE OF REPORTING PERSON<br>IN |

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(1) This percentage is calculated based on 52,020,849 ordinary shares outstanding as of December 31, 2022.

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|:---|:---|:---|
| CUSIP No. G3855L106 | **13G/A** | Page 3 of 6 Pages |

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|:---|:---|
| Item 1(a). | **Name of Issuer** |

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The name of the issuer to which this filing on Schedule 13G/A relates is GH Research PLC (the "Company").

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|:---|:---|
| Item 1(b). | **Address of Issuer's Principal Executive Offices** |

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The principal executive offices of the Company are located at 28 Baggot Street Lower, Dublin 2, D02 NX43, Ireland.

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|:---|:---|
| Item 2(a). | **Name of Person Filing** |

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Theis Terwey.

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|:---|:---|
| Item 2(b). | **Address of Principal Business Office or, if none, Residence**  |

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28 Baggot Street Lower, Dublin 2, D02 NX43, Ireland.

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|:---|:---|
| Item 2(c). | **Citizenship** |

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Germany.

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|:---|:---|
| Item 2(d). | **Title of Class of Securities** |

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The class of equity securities of the Company to which this filing on Schedule 13G/A relates is ordinary shares, nominal value $0.025 per share (the "Ordinary Shares").

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|:---|:---|
| Item 2(e). | **CUSIP Number** |

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The CUSIP number of the Company's Ordinary Shares is 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:**

Not applicable.

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|:---|:---|:---|
| CUSIP No. G3855L106 | **13G/A** | Page 4 of 6 Pages |

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### Item 4. **Ownership** 

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|:---|:---|
| Item 4(a). | **Amount beneficially owned** |

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6,188,070 Ordinary Shares.

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|:---|:---|
| Item 4(b). | **Percent of Class** |

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11.9%. The calculation of the percentage of Ordinary Shares beneficially owned assumes 52,020,849 Ordinary Shares outstanding as of December 31, 2022.

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|:---|:---|
| Item 4(c). | **Number of shares as to which such person has**: |

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(i) sole power to vote or to direct the vote: 6,188,070

(ii) shared power to vote or to direct the vote: 0

(iii) sole power to dispose or to direct the disposition of: 6,188,070

(iv) shared power to dispose or to direct the disposition of: 0

### Item 5. **Ownership of Five Percent or Less of a Class** 
Not applicable.

### Item 6. **Ownership of More than Five Percent on Behalf of Another Person** 
Not applicable.

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|:---|:---|:---|
| CUSIP No. G3855L106 | **13G/A** | Page 5 of 6 Pages |

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### 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. **Certification** 
The Reporting Person hereby makes the following certification:

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.

**SIGNATURES** 

After reasonable inquiry and to the best of my knowledge and belief, the undersigned certifies that the information set forth in this Statement is true, complete and correct.

Dated: February 10, 2023

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| | |
|:---|:---|
| **Theis Terwey** | **Theis Terwey** |
| By: | /s/ Theis Terwey |
| Name: | Theis Terwey |

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