Quick Takeaways
- GHRS - GH Research PLC has 8 insiders with reported activity on this page.
- No net insider buy/sell flow is currently reported for the last year.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
- Holders
Insider Transactions Reported by 8 Insiders of GH Research PLC
- Symbol
- GHRS on Nasdaq
- Location
- Dublin 2, Ireland
What Changed
- No meaningful buy/sell imbalance is currently visible in the one-year window.
- Activity will update as new Forms 3/4/5 are filed.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsInsider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 23 Apr 2025.
Buys
$0
Shares: 0
Insiders: 0
Sells
$0
Shares: 0
Insiders: 0
Net
$0
Shares: 0
Insiders: 0
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
GH Research PLC executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Florian Schonharting | Director | $188,270,121 | Mixed | 01 Apr 2026 | ||
| Magnus Clemensen Halle | Managing Director, Ireland | $1,503,095 | Mixed | 18 Mar 2026 | ||
| Michael Forer | Director | $577,964 | Mixed | 18 Mar 2026 | ||
| Duncan Moore | Director | $195,494 | Market | 18 Mar 2026 | ||
| Dermot John Hanley | Director | $30,886 | Mixed | 18 Mar 2026 | ||
| Velichka Valcheva | Chief Executive Officer | Mixed | 18 Mar 2026 | |||
| Julie Ryan | VP, Finance | Mixed | 18 Mar 2026 | |||
| Aaron Luke Cameron | Chief Operating Officer | Mixed | 18 Mar 2026 |
Top shareholders of GH Research PLC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| Florian Schonharting |
3/4/5
|
Director |
24%
|
14,824,419
|
$188,270,121 | — | 01 Apr 2026 | |
| Lynx1 Capital Management LP |
13D/G
13F
|
Company |
17%
|
10,406,575
|
$164,840,148 | +$28,597,314 | 31 Dec 2025 | |
| RA CAPITAL MANAGEMENT, L.P. |
13D/G
13F
|
Company |
12%
|
7,676,697
|
$123,210,987 | +$11,749,386 | 30 Jun 2025 | |
| BVF INC/IL |
13F
|
Company |
14%
|
8,827,712
|
$112,111,942 | — | 31 Dec 2025 | |
| BIOTECHNOLOGY VALUE FUND L P |
13D/G
|
BVF PARTNERS L P/IL |
14%
|
8,827,712
|
$84,128,095 | $0 | 31 Mar 2025 | |
| FMR LLC |
13D/G
13F
|
Company |
8.2%
|
5,092,145
|
$81,728,927 | +$13,523,168 | 30 Jun 2025 | |
| RTW INVESTMENTS, LP |
13F
13D/G
|
Company |
8.9%
from 13D/G
|
5,933,815
|
$75,359,451 | — | 31 Dec 2025 | |
| Terwey Theis H. |
13D/G
|
— |
2.9%
|
1,784,266
|
$25,515,004 | -$41,593,509 | 30 Sep 2025 | |
| Avoro Capital Advisors LLC |
13F
|
Company |
2.9%
|
1,800,000
|
$22,860,000 | — | 31 Dec 2025 | |
| Cormorant Asset Management, LP |
13F
|
Company |
2.1%
|
1,300,000
|
$16,510,000 | — | 31 Dec 2025 | |
| Jefferies Financial Group Inc. |
13F
|
Company |
1.1%
|
712,300
|
$9,046,210 | — | 31 Dec 2025 | |
| Verition Fund Management LLC |
13F
|
Company |
1.1%
|
673,735
|
$8,556,435 | — | 31 Dec 2025 | |
| 5AM Venture Management, LLC |
13F
|
Company |
0.92%
|
572,665
|
$7,272,846 | — | 31 Dec 2025 | |
| BlackRock, Inc. |
13F
|
Company |
0.7%
|
434,401
|
$5,516,893 | — | 31 Dec 2025 | |
| Troluce Capital Advisors LLC |
13F
|
Company |
0.6%
|
373,212
|
$4,739,792 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
0.59%
|
363,381
|
$4,614,939 | — | 31 Dec 2025 | |
| Squadron Capital Management LLC |
13F
|
Company |
0.51%
|
315,000
|
$4,000,500 | — | 31 Dec 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.48%
|
295,926
|
$3,758,260 | — | 31 Dec 2025 | |
| CenterBook Partners LP |
13F
|
Company |
0.46%
|
283,441
|
$3,599,701 | — | 31 Dec 2025 | |
| MARSHALL WACE, LLP |
13F
|
Company |
0.39%
|
240,764
|
$3,057,703 | — | 31 Dec 2025 | |
| HighVista Strategies LLC |
13F
|
Company |
0.39%
|
240,524
|
$3,054,655 | — | 31 Dec 2025 | |
| Alyeska Investment Group, L.P. |
13F
|
Company |
0.33%
|
204,975
|
$2,603,183 | — | 31 Dec 2025 | |
| Magnus Clemensen Halle |
3/4/5
|
Managing Director, Ireland |
0.19%
|
118,354
|
$1,503,095 | — | 18 Mar 2026 | |
| BOOTHBAY FUND MANAGEMENT, LLC |
13F
|
Company |
0.18%
|
112,184
|
$1,424,737 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.13%
|
80,986
|
$1,028,522 | — | 31 Dec 2025 | |
| AdvisorShares Investments LLC |
13F
|
Company |
0.11%
|
67,112
|
$852,322 | — | 31 Dec 2025 | |
| Trexquant Investment LP |
13F
|
Company |
0.09%
|
54,776
|
$695,655 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.08%
|
51,404
|
$652,830 | — | 31 Dec 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
0.08%
|
50,005
|
$635,063 | — | 31 Dec 2025 | |
| BIT Capital GmbH |
13F
|
Company |
0.08%
|
50,000
|
$635,000 | — | 31 Dec 2025 | |
| Michael Forer |
3/4/5
|
Director |
0.07%
|
45,509
|
$577,964 | — | 18 Mar 2026 | |
| XTX Topco Ltd |
13F
|
Company |
0.07%
|
44,446
|
$564,464 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.06%
|
35,645
|
$452,691 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.05%
|
32,828
|
$416,916 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.04%
|
26,258
|
$333,477 | — | 31 Dec 2025 | |
| Virtus Investment Advisers, LLC |
13F
|
Company |
0.03%
|
20,408
|
$259,182 | — | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0.03%
|
18,881
|
$239,789 | — | 31 Dec 2025 | |
| GSA CAPITAL PARTNERS LLP |
13F
|
Company |
0.03%
|
18,565
|
$236,000 | — | 31 Dec 2025 | |
| HRT FINANCIAL LP |
13F
|
Company |
0.03%
|
15,936
|
$202,000 | — | 31 Dec 2025 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
0.03%
|
15,877
|
$201,638 | — | 31 Dec 2025 | |
| HighTower Advisors, LLC |
13F
|
Company |
0.03%
|
15,600
|
$198,120 | — | 31 Dec 2025 | |
| Duncan Moore |
3/4/5
|
Director |
0.02%
|
14,600
|
$195,494 | — | 18 Mar 2026 | |
| STATE STREET CORP |
13F
|
Company |
0.02%
|
10,821
|
$137,427 | — | 31 Dec 2025 | |
| Lion Point Capital, LP |
13F
|
Company |
0.02%
|
10,200
|
$129,540 | — | 31 Dec 2025 | |
| China Universal Asset Management Co., Ltd. |
13F
|
Company |
0.02%
|
10,107
|
$128,359 | — | 31 Dec 2025 | |
| OSAIC HOLDINGS, INC. |
13F
|
Company |
0.02%
|
10,025
|
$127,317 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.01%
|
4,450
|
$56,515 | — | 31 Dec 2025 | |
| CITIGROUP INC |
13F
|
Company |
0.01%
|
4,404
|
$55,931 | — | 31 Dec 2025 | |
| Mirae Asset Global Investments Co., Ltd. |
13F
|
Company |
0%
|
3,014
|
$38,278 | — | 31 Dec 2025 | |
| Dermot John Hanley |
3/4/5
|
Director |
0%
|
2,432
|
$30,886 | — | 18 Mar 2026 |
Recent Insider Transactions by Companies or Individuals for GH Research PLC
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Florian Schonharting | GHRS | Ordinary Shares | 0 | 14,824,419 | 01 Apr 2026 | Direct | ||||
| Duncan Moore | GHRS | Ordinary Shares | 0 | 14,600 | 18 Mar 2026 | Direct | ||||
| Dermot John Hanley | GHRS | Ordinary Shares | 0 | 2,432 | 18 Mar 2026 | Direct | ||||
| Magnus Clemensen Halle | GHRS | Ordinary Shares | 0 | 118,354 | 18 Mar 2026 | Direct | ||||
| Michael Forer | GHRS | Ordinary Shares | 0 | 45,509 | 18 Mar 2026 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.