argenx SE 13F holders
Of the 44 funds followed here, 10 reported a position in argenx SE in a 13F for the quarter ended 30 June 2026. The largest: FMR LLC, 5.2 million shares worth $4.85 billion, 0.2% of its reported book. New this quarter: Capital Research Global Investors, Alyeska, Baillie Gifford.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| FMR LLC | 5,231,452 | $4.85 billion | 0.2% | +240,418 | added | 30 June 2026 | 13F |
| Citadel Advisors | 273,316 | $253.6 million | 0.0% | -16,910 | trimmed | 30 June 2026 | 13F |
| Two Sigma Investments | 186,238 | $172.8 million | 0.1% | +77,117 | added | 30 June 2026 | 13F |
| Millennium Management | 94,401 | $87.6 million | 0.0% | +22,036 | added | 30 June 2026 | 13F |
| Capital Research Global Investors | 88,511 | $82.1 million | 0.0% | +88,511 | new | 30 June 2026 | 13F |
| Point72 Asset Management | 45,783 | $42.5 million | 0.0% | +38,683 | added | 30 June 2026 | 13F |
| Geode Capital Management | 23,861 | $22.1 million | 0.0% | +292 | added | 30 June 2026 | 13F |
| Alyeska | 2,811 | $2.6 million | 0.0% | +2,811 | new | 30 June 2026 | 13F |
| Bridgewater Associates | 1,958 | $1.8 million | 0.0% | +744 | added | 30 June 2026 | 13F |
| Baillie Gifford | 16 | $14,844 | 0.0% | +16 | new | 30 June 2026 | 13F |
Value is what the fund reported. Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.
Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 14 August 2026 | 13G/A | T. Rowe Price Associates, Inc. and 1 other | 2.7 million | 4.3% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 6 May 2026 | 13G/A | Fmr Llc and 3 others | 5.4 million | 8.7% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 14 November 2025 | 13G/A | T. Rowe Price Associates, Inc. and 1 other | 3.6 million | 6.0% | 30 September 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder. Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short.
Fails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 27 August 2026 | 4 | $1,047.10 | SEC |
| 26 August 2026 | 90 | $1,019.49 | SEC |
| 24 August 2026 | 4,900 | $1,039.78 | SEC |
| 19 August 2026 | 19,757 | $992.99 | SEC |
| 18 August 2026 | 1,699 | $987.84 | SEC |
| 14 August 2026 | 43 | $856.94 | SEC |
| 6 August 2026 | 190 | $867.94 | SEC |
| 5 August 2026 | 224 | $844.50 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period. Largest in the window: 19,757 on 19 August 2026. A fail is an operational fact about settlement, not a position.
Source
Each fund's 13F-HR on EDGAR, linked per row; positions matched to ARGX by CUSIP from the SEC's own fails-to-deliver files; Schedule 13D and 13G from the company's own filing index, each read to confirm the company is the issuer named.
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