GMAB · Insider trading · 13F holders · Congress trades
Genmab A/S - American Depositary Shares (GMAB)
Who is buying and selling GMAB: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 14
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 1
GMAB at a glance
- No open-market insider purchases or sales of GMAB were filed in the last 90 days.
- 14 13F filers hold GMAB among their 50 largest positions, worth $1.3B combined, including James Flynn. The biggest bets by portfolio weight are Superstring Capital Management LP (7.5%), Paradigm Biocapital Advisors LP (6.8%) and Sofinnova Investments, Inc. (5.9%). In their latest 13Fs, 0 managers opened a new position and 7 added to one.
- Members of Congress have disclosed 12 GMAB trades since 2020, 1 purchase and 0 sales in the past year; the latest was Alan Armstrong (R-OK), buying $1K–15K on Mar 30, 2026.
- GMAB last closed at $58.30 on Oct 30, 2026.
GMAB insider trading
No open-market insider purchases or sales of GMAB were filed in the last 90 days.
Who owns GMAB? Hedge funds and superinvestors
14 13F filers hold GMAB among their 50 largest positions, worth $1.3B combined, including James Flynn. The biggest bets by portfolio weight are Superstring Capital Management LP (7.5%), Paradigm Biocapital Advisors LP (6.8%) and Sofinnova Investments, Inc. (5.9%). In their latest 13Fs, 0 managers opened a new position and 7 added to one.
Superinvestors holding GMAB: James Flynn 2.3%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Paradigm Biocapital Advisors LPHedge fund | 6.8% | $360.8M | 13,133,131 | +64.8% shares | Q2 2026 |
| Orbis Allan Gray LtdInvestment manager | 1.1% | $312.3M | 11,368,161 | -12.0% shares | Q2 2026 |
| James FlynnHedge fund | 2.3% | $188.6M | 6,865,000 | +178.8% shares | Q2 2026 |
| Deep Track Capital, LPHedge fund | 2.3% | $155.2M | 5,650,000 | +54.2% shares | Q2 2026 |
| Sofinnova Investments, Inc.Hedge fund | 5.9% | $111.1M | 4,045,215 | +437.7% shares | Q2 2026 |
| Harding Loevner LPAsset manager | 0.8% | $86.9M | 3,086,318 | -4.5% shares | Q2 2026 |
| Superstring Capital Management LPHedge fund | 7.5% | $11.8M | 430,600 | +118.9% shares | Q2 2026 |
| Dixon Mitchell Investment Counsel Inc.Investment manager | 0.4% | $11.4M | 416,000 | — | Q2 2026 |
| FolketrygdfondetInvestment manager | 0.1% | $4.5M | 165,082 | +2.7% shares | Q2 2026 |
| AIMZ Investment Advisors, LLCWealth manager | 1.2% | $4.4M | 160,910 | +0.0% shares | Q2 2026 |
| Legacy Wealth Asset Management, LLCWealth manager | 0.8% | $3.6M | 99,937 | -2.2% shares | Q3 2026 |
| Ishara Investments LPHedge fund | 2.1% | $2.8M | 102,500 | +25.0% shares | Q2 2026 |
| Terra Nova Asset Management LLCWealth manager | 1.6% | $2.4M | 68,527 | +6.7% shares | Q3 2026 |
| Avidity Partners Management LPHedge fund | 0.2% | $1.4M | 50,000 | +0.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q3 2026: 2, Q2 2026: 12). Screen GMAB in the grand portfolio →
GMAB stock trades by members of Congress
Members of Congress have disclosed 12 GMAB trades since 2020, 1 purchase and 0 sales in the past year; the latest was Alan Armstrong (R-OK), buying $1K–15K on Mar 30, 2026.
| Filed | Member | Trade | Amount | Traded | Since |
|---|---|---|---|---|---|
| Jul 21, 2026 | Alan ArmstrongR-OK · Senate | Buy | $1K–15K | Mar 30, 2026 | +125.7% |
| Feb 10, 2025 | Josh GottheimerD-NJ · House | Buy | $1K–15K | Jan 16, 2025 | +174.2% |
| Jan 14, 2025 | Josh GottheimerD-NJ · House | Sale | $1K–15K | Dec 16, 2024 | +190.6% |
| Aug 15, 2024 | Josh GottheimerD-NJ · House | Buy | $1K–15K | Jul 19, 2024 | +109.7% |
| Jul 9, 2024 | Josh GottheimerD-NJ · House | Sale | $1K–15K | Jun 18, 2024 | +125.5% |
| Nov 11, 2023 | Josh GottheimerD-NJ · House | Buy | $1K–15K | Oct 16, 2023 | +78.7% |
| Oct 15, 2023 | Josh GottheimerD-NJ · House | Sale | $1K–15K | Sep 15, 2023 | +53.2% |
| Aug 21, 2023 | Josh GottheimerD-NJ · House | Buy | $1K–15K | Jul 20, 2023 | +40.4% |
| Aug 21, 2023 | Josh GottheimerD-NJ · House | Buy | $1K–15K | Jul 19, 2023 | +42.2% |
| Aug 13, 2023 | Daniel S. GoldmanD-NY · House | Sale | $50K–100K | Jul 10, 2023 | +53.7% |
| Apr 17, 2023 | Daniel S. GoldmanD-NY · House | Sale | $1K–15K | Mar 31, 2023 | +54.1% |
| May 17, 2021 | Thomas R. CarperD-DE · Senate | Buy | $1K–15K | Nov 20, 2020 | +59.6% |
4 members have traded GMAB: Alan Armstrong, Josh Gottheimer, Daniel S. Goldman, Thomas R. Carper.
GMAB questions and answers
Are insiders buying GMAB stock?
No open-market insider purchases or sales of GMAB were filed in the last 90 days.
Which hedge funds own GMAB?
14 13F filers hold GMAB among their 50 largest positions, worth $1.3B combined, including James Flynn. The biggest bets by portfolio weight are Superstring Capital Management LP (7.5%), Paradigm Biocapital Advisors LP (6.8%) and Sofinnova Investments, Inc. (5.9%). In their latest 13Fs, 0 managers opened a new position and 7 added to one.
Has Congress traded GMAB?
Members of Congress have disclosed 12 GMAB trades since 2020, 1 purchase and 0 sales in the past year; the latest was Alan Armstrong (R-OK), buying $1K–15K on Mar 30, 2026.
Who is the largest holder of GMAB?
Among 13F filers, Paradigm Biocapital Advisors LP reports the largest GMAB position, $360.8M (13,133,131 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Superstring Capital Management LP's: 7.5% of its portfolio.
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