GMAB in the 13F filings
Genmab A S · CUSIP 372303206
- Quarter end
- 30 Jun 2025
- the date the book describes
- Filed
- 18 Aug 2025
- latest of these filings; the earliest 6 Aug 2025
- Managers listing it
- 10
- at least, of 95 tracked, among listed positions
- Comparable managers
- 95
- filed both Q1 2025 and Q2 2025; 7 listed it in both
- Shares listed
- 23,973,027
- combined, among listed positions
- Reported value
- $495m
- combined, at the quarter end
Among the 95 comparable managers: 3 buyers (opened or added shares) and 7 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.
Managers listing GMAB in Q2 2025
10 of 10 holders
| Action | Filing | |||||
|---|---|---|---|---|---|---|
| AllianceBernstein LP | 10,662,375 | $220m | 0.07% | Trimmed | -4,062,783 | 14 Aug 2025 (the filing on sec.gov) |
| Arrowstreet Capital LP | 3,454,378 | $71m | 0.05% | Added | n.a. | 13 Aug 2025 (the filing on sec.gov) |
| Renaissance Technologies LLC | 2,766,750 | $57m | 0.08% | Added | +504,400 | 13 Aug 2025 (the filing on sec.gov) |
| Marshall Wace LLP | 1,907,284 | $39m | under 0.1% | Trimmed | -274,226 | 13 Aug 2025 (the filing on sec.gov) |
| Two Sigma Advisers LP | 1,821,000 | $38m | 0.08% | Trimmed | -152,700 | 14 Aug 2025 (the filing on sec.gov) |
| Two Sigma Investments LP | 1,618,544 | $33m | 0.06% | Trimmed | -281,222 | 14 Aug 2025 (the filing on sec.gov) |
| Voloridge Investment Management LLC | 949,178 | $20m | 0.07% | Trimmed | -364,107 | 14 Aug 2025 (the filing on sec.gov) |
| Woodline Partners LP | 493,506 | $10m | 0.05% | New | new | 14 Aug 2025 (the filing on sec.gov) |
| Hudson Bay Capital Management LP | 300,000 | $6.2m | under 0.1% | Trimmed | n.a. | 18 Aug 2025 (the filing on sec.gov) |
| Baillie Gifford & Co | 12 | $0 | 0.00% | Trimmed | -42 | 6 Aug 2025 (the filing on sec.gov) |
Largest increases and reductions, by shares
Increases
- Renaissance Technologies LLCexisting position · 2,766,750 shares now+504,400
- Woodline Partners LPnew position · 493,506 shares now+493,506
Reductions
- AllianceBernstein LPexisting position · 10,662,375 shares now-4,062,783
- Voloridge Investment Management LLCexisting position · 949,178 shares now-364,107
- Two Sigma Investments LPexisting position · 1,618,544 shares now-281,222
- Marshall Wace LLPexisting position · 1,907,284 shares now-274,226
- Two Sigma Advisers LPexisting position · 1,821,000 shares now-152,700
New positions and exits
New (1)
Exited (0)
No exit shown by a manager’s own filing.
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q3 2019 | 3 | $95m | n.a. | n.a. |
| Q4 2019 | 3 | $99m | n.a. | n.a. |
| Q1 2020 | 5 | $114m | n.a. | n.a. |
| Q2 2020 | 6 | $224m | n.a. | n.a. |
| Q3 2020 | 7 | $364m | n.a. | n.a. |
| Q4 2020 | 5 | $238m | n.a. | n.a. |
| Q1 2021 | 3 | $121m | n.a. | n.a. |
| Q2 2021 | 3 | $187m | n.a. | n.a. |
| Q3 2021 | 3 | $166m | n.a. | n.a. |
| Q4 2021 | 3 | $168m | n.a. | n.a. |
| Q1 2022 | 4 | $168m | n.a. | n.a. |
| Q2 2022 | 4 | $96m | n.a. | n.a. |
| Q3 2022 | 7 | $412m | n.a. | n.a. |
| Q4 2022 | 6 | $422m | n.a. | n.a. |
| Q1 2023 | 3 | $333m | n.a. | n.a. |
| Q2 2023 | 2 | $343m | n.a. | n.a. |
| Q3 2023 | 3 | $385m | n.a. | n.a. |
| Q4 2023 | 4 | $548m | 4 | 0 |
| Q1 2024 | 6 | $540m | 2 | 4 |
| Q2 2024 | 6 | $457m | 5 | 1 |
| Q3 2024 | 6 | $447m | 3 | 1 |
| Q4 2024 | 8 | $480m | 6 | 1 |
| Q1 2025 | 8 | $495m | 6 | 1 |
| Q2 2025 | 10 | $495m | 3 | 7 |
| Q3 2025 | 7 | $643m | 3 | 5 |
| Q4 2025 | 5 | $617m | 8 | 10 |
| Q1 2026 | 6 | $623m | 11 | 12 |
| Q2 2026 | 7 | $583m | 15 | 6 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
GMAB and LLY →GMAB and JNJ →GMAB and VRTX →Choose a stock to compare with GMAB →
How much of the picture this is
A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.
Which funds own GMAB, latest filings →Back to the 13F Explorer →