Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in GMAB held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Orbis Allan Gray Ltd | 12.9M | $346.8M | -10.3% | 2.105% | 1.46% |
| 2 | ALLIANCEBERNSTEIN L.P. | 9.6M | $294.4M | -12.1% | 1.557% | 0.10% |
| 3 | Paradigm Biocapital Advisors LP | 8.0M | $213.8M | +13.2% | 1.298% | 4.37% |
| 4 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 5.0M | $133.5M | -0.1% | 0.810% | 0.07% |
| 5 | BlackRock, Inc. | 4.5M | $121.7M | -1.3% | 0.739% | 0.00% |
| 6 | RENAISSANCE TECHNOLOGIES LLC | 4.4M | $118.4M | +26.4% | 0.719% | 0.19% |
| 7 | Deep Track Capital, LP | 3.7M | $98.3M | — | 0.597% | 2.03% |
| 8 | HARDING LOEVNER LP | 3.2M | $86.7M | -4.1% | 0.526% | 0.89% |
| 9 | DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) | 2.5M | $66.1M | — | 0.401% | 0.78% |
| 10 | FIRST TRUST ADVISORS LP | 2.5M | $66.0M | +84.3% | 0.401% | 0.05% |
| 11 | TWO SIGMA INVESTMENTS, LP | 2.3M | $62.8M | +161.1% | 0.381% | 0.05% |
| 12 | MORGAN STANLEY | 2.2M | $58.6M | +19.1% | 0.356% | 0.00% |
| 13 | FEDERATED HERMES, INC. | 1.3M | $33.6M | +84.2% | 0.204% | 0.05% |
| 14 | FRANKLIN RESOURCES INC | 1.2M | $32.0M | +3792.8% | 0.194% | 0.01% |
| 15 | Pictet Asset Management Holding SA | 1.1M | $28.9M | -1.9% | 0.176% | 0.03% |
| 16 | FMR LLC | 1.0M | $27.1M | -4.3% | 0.165% | 0.00% |
| 17 | NORTHERN TRUST CORP | 951K | $25.5M | -0.7% | 0.155% | 0.00% |
| 18 | GOLDMAN SACHS GROUP INC | 931K | $25.0M | -30.1% | 0.152% | 0.00% |
| 19 | ENVESTNET ASSET MANAGEMENT INC | 862K | $23.1M | +6.9% | 0.141% | 0.01% |
| 20 | Russell Investments Group, Ltd. | 797K | $21.4M | +12.2% | 0.130% | 0.02% |
| 21 | MILLENNIUM MANAGEMENT LLC | 792K | $21.3M | +737.8% | 0.129% | 0.01% |
| 22 | Perpetual Ltd | 759K | $20.4M | -8.3% | 0.123% | 0.31% |
| 23 | Sofinnova Investments, Inc. | 752K | $20.2M | — | 0.122% | 1.06% |
| 24 | Qube Research & Technologies Ltd | 677K | $18.2M | +1616.8% | 0.110% | 0.02% |
| 25 | Alyeska Investment Group, L.P. | 645K | $17.3M | +27.4% | 0.105% | 0.05% |
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 GMAB — a direct measure of their conviction.
Filings activity in GMAB 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 | 265 | 7.7% | 14.38% | 0.24 pp | $2.21B | 1.6% |
| Q4 2025 | 287 | +18% | 14.62% | +2.11 pp | $2.25B | +17% |
| Q3 2025 | 244 | +11% | 12.51% | +3.81 pp | $1.93B | +44% |
| Q2 2025 | 219 | +0.9% | 8.70% | +1.07 pp | $1.34B | +14% |
| Q1 2025 | 217 | 4.0% | 7.63% | +0.02 pp | $1.18B | +0.3% |
| Q4 2024 | 226 | +2.3% | 7.61% | 0.39 pp | $1.17B | 4.9% |
| Q3 2024 | 221 | +1.8% | 8.00% | +0.35 pp | $1.23B | +4.6% |
| Q2 2024 | 217 | — | 7.65% | — | $1.18B | — |
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 GMAB stock.
Based on Q1 2026 13F filings, institutional ownership of Genmab A/S stands at 14.4%, held across 265 reporting institutions.
Orbis Allan Gray Ltd is the largest reported institutional holder of GMAB, with approximately 12,925,578 shares worth $0.35B as of Q1 2026.
Yes — 3 widely-followed marquee investors appear among the top 25 institutional holders of GMAB, including RENAISSANCE TECHNOLOGIES LLC, TWO SIGMA INVESTMENTS, LP, MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for GMAB is 54 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
43 institutions opened new positions in GMAB during Q1 2026, while 65 fully exited. 61 added to existing positions and 157 trimmed.
GMAB institutional ownership fell by 0.24 percentage points quarter-over-quarter, with a net change of -22 holders.
The top 10 institutions account for 69.8% of all reported 13F value in GMAB, and the top 25 account for 89.4%.
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.
Genmab A/S (GMAB) Institutional Ownership