Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in GHRS held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Lynx1 Capital Management LP | 10.8M | $151.3M | +3.4% | 15.700% | 23.92% |
| 2 | BVF INC/IL | 8.7M | $121.6M | -2.0% | 12.617% | 3.87% |
| 3 | RA CAPITAL MANAGEMENT, L.P. | 7.7M | $107.9M | 0.0% | 11.197% | 1.14% |
| 4 | RTW INVESTMENTS, LP | 5.9M | $83.4M | 0.0% | 8.655% | 0.83% |
| 5 | FMR LLC | 5.1M | $72.2M | 0.0% | 7.492% | 0.00% |
| 6 | Avoro Capital Advisors LLC | 1.8M | $25.3M | 0.0% | 2.626% | 0.26% |
| 7 | TORONTO DOMINION BANK | 1.4M | $19.7M | β | 2.039% | 0.03% |
| 8 | Troluce Capital Advisors LLC | 990K | $13.9M | +165.4% | 1.445% | 1.47% |
| 9 | MILLENNIUM MANAGEMENT LLC | 938K | $13.2M | +216.9% | 1.368% | 0.01% |
| 10 | Jefferies Financial Group Inc. | 712K | $10.0M | 0.0% | 1.039% | 0.07% |
| 11 | 5AM Venture Management, LLC | 573K | $8.1M | 0.0% | 0.835% | 2.24% |
| 12 | BlackRock, Inc. | 456K | $6.4M | +4.9% | 0.665% | 0.00% |
| 13 | UBS Group AG | 412K | $5.8M | +13.5% | 0.602% | 0.00% |
| 14 | Squadron Capital Management LLC | 325K | $4.6M | +3.2% | 0.474% | 1.90% |
| 15 | Foresite Capital Management VI LLC | 315K | $4.4M | β | 0.460% | 0.96% |
| 16 | BOOTHBAY FUND MANAGEMENT, LLC | 283K | $4.0M | +152.2% | 0.413% | 0.10% |
| 17 | CenterBook Partners LP | 217K | $3.0M | -23.6% | 0.316% | 0.16% |
| 18 | HighVista Strategies LLC | 213K | $3.0M | -11.4% | 0.311% | 0.83% |
| 19 | MARSHALL WACE, LLP | 91K | $1.3M | -62.2% | 0.133% | 0.00% |
| 20 | Occam Crest Management LP | 80K | $1.1M | β | 0.117% | 0.70% |
| 21 | Trexquant Investment LP | 70K | $982K | +27.4% | 0.102% | 0.01% |
| 22 | AdvisorShares Investments LLC | 67K | $942K | -0.1% | 0.098% | 0.17% |
| 23 | CITADEL ADVISORS LLC | 65K | $920K | β | 0.096% | 0.00% |
| 24 | XTX Topco Ltd | 52K | $732K | +17.2% | 0.076% | 0.01% |
| 25 | GOLDMAN SACHS GROUP INC | 45K | $630K | -44.7% | 0.065% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in GHRS β a direct measure of their conviction.
Filings activity in GHRS during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 52 | +0.0% | 46.15% | +5.27 pp | $668M | +13% |
| Q4 2025 | 52 | +11% | 40.88% | 1.81 pp | $592M | 4.2% |
| Q3 2025 | 47 | +21% | 42.69% | +6.02 pp | $618M | +16% |
| Q2 2025 | 39 | +11% | 36.67% | +4.27 pp | $531M | +13% |
| Q1 2025 | 35 | +17% | 32.40% | +17.59 pp | $469M | +119% |
| Q4 2024 | 30 | +11% | 14.81% | +0.84 pp | $214M | +6.1% |
| Q3 2024 | 27 | +3.8% | 13.97% | 10.34 pp | $202M | 43% |
| Q2 2024 | 26 | β | 24.31% | β | $352M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying GHRS stock.
Based on Q1 2026 13F filings, institutional ownership of GH Research PLC stands at 46.2%, held across 52 reporting institutions.
Lynx1 Capital Management LP is the largest reported institutional holder of GHRS, with approximately 10,763,288 shares worth $0.15B as of Q1 2026.
Yes β 2 widely-followed marquee investors appear among the top 25 institutional holders of GHRS, including MILLENNIUM MANAGEMENT LLC, CITADEL ADVISORS LLC.
Our composite Smart Money Score for GHRS is 65 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
12 institutions opened new positions in GHRS during Q1 2026, while 12 fully exited. 32 added to existing positions and 8 trimmed.
GHRS institutional ownership rose by 5.27 percentage points quarter-over-quarter, with a net change of +0 holders.
The top 10 institutions account for 92.6% of all reported 13F value in GHRS, and the top 25 account for 99.4%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
GH Research PLC (GHRS) Institutional Ownership