Genmab A/S (Nasdaq Copenhagen: GMAB.CO) closed at 2,167.00 DKK, +0.4%, on 2026-08-27, with a return on equity of 17.5%, a net margin of 25.9% and 3-year sales growth of -36.5%. Institutional ownership, earnings history and filed financials are on the tabs below.
13F holders of the US line GMAB — counts and % are its.
% of shares outstanding not shown: this line files 20-F annual reports only — a foreign private issuer whose US listing trades as ADSs (depositary receipts), while its cover-page share count is in ORDINARY shares. The depositary ratio is not in our data. The count we hold for this line is 64,238,408 shares (as of 2025-12-31, source company_meta:ifrs-bs). Dividing one by the other is wrong by the whole ratio (a 5:1 ADR reads one fifth of the true percentage), so the percentage is withheld rather than served wrong. Holder share counts are shown as filed.
Crowding percentile lands with its cohort — the cohort is size-matched, so it needs a market cap for GMAB in the served universe — that lands with the next screener build.
| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | Orbis Allan Gray Ltdtracked | 12,925,57812.9M | $347M | — | TRIM -10% |
| 2 | ALLIANCEBERNSTEIN L.P. | 9,557,1499.6M | $294M | — | TRIM -12% |
| 3 | Paradigm Biocapital Advisors LP | 7,967,8368.0M | $214M | — | ADD 13% |
| 4 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 4,975,3245.0M | $133M | — | — |
| 5 | BlackRock, Inc. | 4,536,5654.5M | $122M | — | — |
| 6 | RENAISSANCE TECHNOLOGIES LLC | 4,414,5504.4M | $118M | — | ADD 26% |
| 7 | Deep Track Capital, LP | 3,663,2503.7M | $98M | — | NEW |
| 8 | Harding Loevner LP | 3,231,6013.2M | $87M | — | TRIM -4% |
| 9 | DEERFIELD MANAGEMENT COMPANY, L.P. | 2,462,0002.5M | $66M | — | NEW |
| 10 | FIRST TRUST ADVISORS LP | 2,461,3422.5M | $66M | — | ADD 84% |
Ranked by each filer’s own reported value, not shares.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| Deep Track Capital, LP | +3,663,250 | $98M | OPEN |
| DEERFIELD MANAGEMENT COMPANY, L.P. | +2,462,000 | $66M | OPEN |
| TWO SIGMA INVESTMENTS, LP | +1,443,589 | $39M | ADD |
| FRANKLIN RESOURCES INC | +1,162,495 | $31M | ADD |
| FIRST TRUST ADVISORS LP | +1,126,069 | $30M | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| Orbis Allan Gray Ltd | −1,492,884 | $40M | TRIM |
| ALLIANCEBERNSTEIN L.P. | −1,319,945 | $35M | TRIM |
| Brandywine Global Investment Management, LLC | −1,031,464 | $28M | CLOSE |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | −612,323 | $16M | CLOSE |
| GOLDMAN SACHS GROUP INC | −402,044 | $11M | TRIM |
Prior quarter split-rebased · 13Fs are long, US-listed only.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| Orbis Allan Gray Ltdtracked | 2.8M | 5.7M | 7.9M | 11.1M | 14.4M | 12.9M | $347M |
| ALLIANCEBERNSTEIN L.P. | 14.9M | 14.7M | 10.7M | 11.0M | 10.9M | 9.6M | $294M |
| Paradigm Biocapital Advisors LP | — | — | — | 3.8M | 7.0M | 8.0M | $214M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 30K | 1.4M | 3.5M | 3.6M | 5.0M | 5.0M | $133M |
| BlackRock, Inc. | 4.2M | 3.5M | 3.2M | 3.5M | 4.6M | 4.5M | $122M |
| RENAISSANCE TECHNOLOGIES LLC | 1.9M | 2.3M | 2.8M | 2.8M | 3.5M | 4.4M | $118M |
| Deep Track Capital, LP | 2.0M | — | — | 481K | — | 3.7M | $98M |
| Harding Loevner LP | 2.2M | 2.9M | 2.9M | 3.5M | 3.4M | 3.2M | $87M |
| DEERFIELD MANAGEMENT COMPANY, L.P. | — | — | — | — | — | 2.5M | $66M |
| FIRST TRUST ADVISORS LP | 1.6M | 1.7M | 1.8M | 1.7M | 1.3M | 2.5M | $66M |
Green = added, red = trimmed, grey = held; a dash is a quarter with no 13F on file — a gap, not an exit.
Holders only — breaks = no 13F.
Short interest has its own tab now — open SI →
SEC Form 13F · ~10,250 filers, 10y · long-only, US-listed, filed ≤45d after quarter-end.
