ARGX — ARGENX SE
Reported value held$14.28B
Funds holding (latest)51
SectorHealth Care
Funds holding (Q2 2026)39
Institutional value$11.96B · 15.56M sh
New / Add / Cut / Exit6 / 15 / 16 / 2
Top-5 / Top-10 concentration75.9% / 87.8%
Institutional holdings change
Reducing -16.3%
(-3.02M sh)
Institutional value change
Up +7.7%
As of Q2 2026, 39 SEC-registered investment managers reported holding ARGX (ARGENX SE) in their latest 13F filings, with a combined reported value of $11.96B across 15.56M shares. That is -16.3% by share count (-3.02M shares) versus the previous quarter, while reported value moved +7.7%. Ownership is concentrated: the five largest holders account for 75.9% of reported value and the top ten for 87.8%.
Compared with the prior quarter, 6 opened new positions, 15 added to existing stakes, 16 trimmed, 2 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
ARGX is classified in the Health Care sector.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
| Fund | Quarter | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|---|
| Fidelity Management & Research (FMR) history | Q2 2026 | 5.23M | $4.85B | 0.23% | Add |
| Capital World Investors history | Q2 2026 | 2.20M | $2.04B | 0.26% | Reduce |
| Janus Henderson Group history | Q1 2026 | 2.54M | $1.85B | 0.92% | Add |
| Wellington Management Group history | Q2 2026 | 930.55K | $863.33M | 0.16% | Reduce |
| BlackRock Inc history | Q2 2026 | 777.24K | $721.10M | 0.01% | Reduce |
| Morgan Stanley history | Q2 2026 | 643.12K | $596.67M | 0.03% | Add |
| Invesco Ltd history | Q2 2026 | 443.99K | $411.92M | 0.03% | Reduce |
| Bank of America Corp history | Q2 2026 | 400.23K | $371.33M | 0.03% | Hold |
| Citadel Advisors history | Q2 2026 | 273.32K | $253.57M | 0.03% | Reduce |
| Franklin Resources history | Q2 2026 | 224.93K | $208.68M | 0.05% | Reduce |
| Two Sigma Investments history | Q2 2026 | 186.24K | $172.79M | 0.13% | Add |
| MFS Investment Management history | Q1 2024 | 425.55K | $167.55M | 0.05% | Reduce |
| Goldman Sachs Group history | Q2 2026 | 177.85K | $165.00M | 0.01% | Reduce |
| Legal & General Investment Management America history | Q2 2026 | 177.16K | $164.37M | 0.03% | Add |
| Alkeon Capital Management history | Q3 2025 | 175.00K | $129.07M | 0.19% | Add |
| Deutsche Bank AG history | Q2 2026 | 137.34K | $127.42M | 0.04% | Reduce |
| Baron Funds history | Q2 2026 | 136.65K | $126.78M | 0.30% | Reduce |
| Lazard Asset Management history | Q2 2026 | 132.00K | $122.46M | 0.19% | Reduce |
| Millennium Management history | Q2 2026 | 94.40K | $87.58M | 0.03% | Add |
| Capital Research Global Investors history | Q2 2026 | 88.51K | $82.12M | 0.01% | New |
New Positions (Q2 2026)
- Capital Research Global Investors 88.51K sh · $82.12M
- CPP Investments 60.58K sh · $56.20M
- Arrowstreet Capital 40.06K sh · $37.17M
- Fidelity International (FIL) 16.25K sh · $15.08M
- JPMorgan Chase & Co 15.63K sh · $14.26M
- Baillie Gifford & Co 16 sh · $14.84K
Fully Exited (vs previous quarter)
- Janus Henderson Group sold 2.54M sh · $1.85B
- Balyasny Asset Management sold 13.11K sh · $9.57M
Fund Position History — shares by quarter (top 20 funds)
| Fund | Q3 2021 | Q4 2021 | Q1 2022 | Q2 2022 | Q3 2022 | Q4 2022 | Q1 2023 | Q2 2023 | Q3 2023 | Q4 2023 | Q1 2024 | Q2 2024 | Q3 2024 | Q4 2024 | Q1 2025 | Q2 2025 | Q3 2025 | Q4 2025 | Q1 2026 | Q2 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fidelity Management & Research (FMR) | 4.46M | 4.59M | 4.68M | 4.97M | 5.19M | 5.21M | 5.23M | 5.06M | 4.96M | 3.81M | 3.27M | 3.53M | 4.79M | 5.62M | 5.66M | 5.42M | 5.69M | 5.59M | 4.99M | 5.23M |
| Capital World Investors | 660.59K | 660.27K | 739.39K | 739.39K | 740.00K | 740.93K | 1.06M | 1.18M | 1.43M | 1.96M | 1.86M | 1.51M | 1.70M | 1.79M | 1.94M | 1.95M | 1.96M | 1.92M | 2.26M | 2.20M |
| Wellington Management Group | 668.70K | 399.03K | 238.51K | 51.98K | 215.59K | 220.67K | 258.28K | 234.06K | 221.21K | 279.17K | 276.17K | 426.73K | 482.35K | 424.97K | 406.20K | 405.33K | 729.99K | 679.24K | 1.02M | 930.55K |
| BlackRock Inc | — | — | — | — | — | — | — | — | — | — | — | — | 1.12M | 1.07M | 1.02M | 550.15K | 523.80K | 735.60K | 808.34K | 777.24K |
| Morgan Stanley | 17.56K | 46.85K | 53.26K | 143.38K | 187.11K | 630.33K | 546.51K | 556.43K | 554.91K | 652.89K | 693.88K | 819.84K | 930.75K | 938.54K | 877.15K | 429.29K | 435.11K | 518.85K | 560.71K | 643.12K |
| Invesco Ltd | 48.53K | 50.07K | 33.71K | 33.87K | 47.98K | 72.83K | 57.27K | 90.31K | 430.79K | 436.23K | 419.15K | 201.47K | 433.52K | 404.02K | 382.74K | 243.75K | 84.92K | 416.41K | 594.70K | 443.99K |
| Bank of America Corp | 51.07K | 50.98K | 78.22K | 81.34K | 69.82K | 104.48K | 297.83K | 203.86K | 145.23K | 138.65K | 273.56K | 290.20K | 335.71K | 258.55K | 340.12K | 336.12K | 342.38K | 400.78K | 400.12K | 400.23K |
| Citadel Advisors | 46.30K | 85.37K | 34.80K | 130.93K | 74.88K | 185.00K | 116.03K | 439.69K | 510.52K | 341.56K | 175.38K | 716.39K | 680.03K | 561.71K | 589.14K | 901.57K | 772.96K | 401.55K | 290.23K | 273.32K |
| Franklin Resources | 135.29K | 135.28K | 251.27K | 250.66K | 211.37K | 211.10K | 246.68K | 246.31K | 182.67K | 174.23K | 167.09K | 136.22K | 134.02K | 134.59K | 137.20K | 279.80K | 258.27K | 237.70K | 233.49K | 224.93K |
| Two Sigma Investments | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 73.95K | 43.88K | 294.16K | 258.56K | 109.12K | 186.24K |
| Goldman Sachs Group | 147.07K | 205.41K | 334.17K | 272.89K | 253.88K | 189.88K | 168.91K | 137.69K | 153.63K | 263.57K | 131.45K | 150.44K | 132.18K | 146.96K | 168.76K | 147.15K | 198.71K | 167.19K | 231.99K | 177.85K |
| Legal & General Investment Management America | — | — | — | 28.66K | 39.93K | 49.39K | 51.16K | 61.39K | 64.38K | 78.30K | 81.66K | 108.52K | 110.27K | 112.97K | 114.09K | 125.81K | 148.62K | 144.35K | 150.85K | 177.16K |
| Deutsche Bank AG | 8.25K | 4.82K | 307.54K | 346.97K | 420.76K | 431.26K | 431.23K | 154.18K | 6.98K | 189.41K | 159.57K | 159.61K | 106.69K | 102.03K | 96.91K | 19.93K | 88.72K | 134.71K | 139.38K | 137.34K |
| Baron Funds | 550.67K | 563.53K | 501.34K | 420.64K | 417.20K | 364.29K | 248.96K | 250.27K | 287.99K | 287.38K | 266.67K | 261.48K | 250.30K | 242.18K | 213.40K | 180.73K | 167.69K | 153.72K | 138.65K | 136.65K |
| Lazard Asset Management | 379 | 194 | 194 | 194 | 1.54K | 1.54K | 180 | 180 | 4.49K | 3.34K | 942 | 398 | 5.95K | 70.64K | 70.25K | 127.49K | 137.20K | 133.03K | 133.35K | 132.00K |
| Millennium Management | 36.21K | 76.71K | 77.49K | 96.86K | 103.18K | 158.78K | 182.37K | 243.39K | 278.32K | 503.83K | 154.86K | 122.46K | 125.06K | 64.42K | 268.60K | 429.84K | 347.52K | 60.46K | 72.36K | 94.40K |
| Capital Research Global Investors | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 88.51K |
| PSP Investments | 98.20K | 98.20K | 98.20K | 98.20K | 98.20K | 89.73K | 77.38K | 77.38K | 77.38K | — | — | — | — | 105.97K | 82.08K | 82.08K | — | 36.60K | 73.30K | 84.30K |
| D. E. Shaw & Co | 34.82K | 51.13K | 26.27K | 132.13K | 328.22K | 257.03K | 197.86K | 180.25K | 231.99K | 210.75K | 143.13K | 83.88K | 141.60K | 325.30K | 323.02K | 210.26K | 253.93K | 124.63K | 134.02K | 71.36K |
| Amundi US | — | — | — | 2.13K | 1.80K | 2.09K | 2.20K | 2.10K | 2.12K | 2.39K | 3.56K | 5.44K | 5.75K | 5.87K | 6.35K | 7.77K | 8.18K | 42.48K | 61.43K | 65.12K |
▲ Bought Low (fund opened/added, stock rose ≥5% next quarter) ▼ Sold High (fund reduced, stock fell ≥5% next quarter)
Drag / scroll to zoom · Default shows the most recent year · Annotations come from quarterly fund actions in 13F filings · Hover a marker for details