Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in IMCR held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | RTW INVESTMENTS, LP | 4.9M | $146.8M | 0.0% | 9.580% | 1.46% |
| 2 | FMR LLC | 4.8M | $145.6M | +6.4% | 9.500% | 0.01% |
| 3 | WELLINGTON MANAGEMENT GROUP LLP | 4.7M | $141.9M | +0.3% | 9.258% | 0.03% |
| 4 | PRIMECAP MANAGEMENT CO/CA/ | 3.7M | $111.4M | -6.8% | 7.266% | 0.09% |
| 5 | Bellevue Group AG | 2.8M | $84.3M | 0.0% | 5.502% | 2.01% |
| 6 | Vestal Point Capital, LP | 2.8M | $83.4M | +373.0% | 5.443% | 2.33% |
| 7 | TANG CAPITAL MANAGEMENT LLC | 2.6M | $79.9M | +0.8% | 5.212% | 4.06% |
| 8 | Caption Management, LLC | 1.9M | $58.3M | — | 3.805% | 0.56% |
| 9 | Deep Track Capital, LP | 1.9M | $58.2M | -3.6% | 3.800% | 1.20% |
| 10 | Logos Global Management LP | 1.5M | $45.2M | +76.5% | 2.951% | 2.26% |
| 11 | BVF INC/IL | 1.3M | $39.0M | -13.1% | 2.547% | 1.24% |
| 12 | MILLENNIUM MANAGEMENT LLC | 1.2M | $37.3M | +35.7% | 2.434% | 0.02% |
| 13 | ARMISTICE CAPITAL, LLC | 1.2M | $35.8M | +8.2% | 2.337% | 1.06% |
| 14 | Point72 Asset Management, L.P. | 1.1M | $33.2M | +118.6% | 2.168% | 0.05% |
| 15 | Fiera Capital Corp | 1.1M | $32.6M | +3.4% | 2.125% | 0.11% |
| 16 | TWO SIGMA INVESTMENTS, LP | 1.0M | $30.8M | +184.2% | 2.009% | 0.02% |
| 17 | Kynam Capital Management, LP | 885K | $26.7M | +3.3% | 1.741% | 1.67% |
| 18 | BAKER BROS. ADVISORS LP | 734K | $22.1M | -68.4% | 1.445% | 0.13% |
| 19 | Trails Edge Capital Partners, LP | 683K | $20.6M | 0.0% | 1.343% | 4.71% |
| 20 | BlackRock, Inc. | 656K | $19.8M | +99.4% | 1.291% | 0.00% |
| 21 | Hudson Bay Capital Management LP | 633K | $19.1M | +65.1% | 1.246% | 0.21% |
| 22 | JANUS HENDERSON GROUP PLC | 595K | $17.9M | +30.9% | 1.170% | 0.01% |
| 23 | PRINCIPAL FINANCIAL GROUP INC | 519K | $15.7M | -21.2% | 1.021% | 0.01% |
| 24 | Frazier Life Sciences Management, L.P. | 485K | $14.6M | +26.0% | 0.954% | 0.38% |
| 25 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 407K | $12.3M | -0.0% | 0.801% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in IMCR — a direct measure of their conviction.
Filings activity in IMCR during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 138 | 5.5% | 102.53% | 1.09 pp | $1.51B | 1.0% |
| Q4 2025 | 146 | +16% | 103.62% | +3.20 pp | $1.53B | +3.2% |
| Q3 2025 | 126 | 3.8% | 100.42% | +16.70 pp | $1.48B | +20% |
| Q2 2025 | 131 | +16% | 83.72% | +7.54 pp | $1.23B | +9.9% |
| Q1 2025 | 113 | +0.9% | 76.18% | +4.17 pp | $1.12B | +5.8% |
| Q4 2024 | 112 | 8.9% | 72.01% | 4.87 pp | $1.06B | 6.3% |
| Q3 2024 | 123 | 5.4% | 76.88% | 6.41 pp | $1.13B | 7.7% |
| Q2 2024 | 130 | — | 83.29% | — | $1.23B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying IMCR stock.
Based on Q1 2026 13F filings, institutional ownership of Immunocore Holdings plc stands at 102.5%, held across 138 reporting institutions.
RTW INVESTMENTS, LP is the largest reported institutional holder of IMCR, with approximately 4,869,798 shares worth $0.15B as of Q1 2026.
Yes — 3 widely-followed marquee investors appear among the top 25 institutional holders of IMCR, including MILLENNIUM MANAGEMENT LLC, Point72 Asset Management, L.P., TWO SIGMA INVESTMENTS, LP.
Our composite Smart Money Score for IMCR is 45 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
24 institutions opened new positions in IMCR during Q1 2026, while 32 fully exited. 31 added to existing positions and 83 trimmed.
IMCR institutional ownership fell by 1.09 percentage points quarter-over-quarter, with a net change of -8 holders.
The top 10 institutions account for 63.3% of all reported 13F value in IMCR, and the top 25 account for 88.3%.
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.
Immunocore Holdings plc (IMCR) Institutional Ownership