Avoro Capital Advisors LLC: ARGENX SE (ARGX): Quarterly 13F Position History
As of Q1 2026, Avoro Capital Advisors LLC reported 1,000,000 shares of ARGENX SE (ARGX), worth $730.3M and representing 7.2% of its 13F equity book. Quarter-over-quarter share count change: + 10,000 (+1.0%) . The position first appeared in Q2 2017 and has been disclosed across 36 13F-HR filings in Pactolio's tracked window.
- 1,000,000Shares Held (Latest Filing)
- $730.3MReported Market Value (Latest Filing)
- 7.2%Portfolio Weight (% of 13F Equity Book)
- +10,000Quarter-over-Quarter Share Change
- -$102.3MQuarter-over-Quarter Value Change
- 1,287,500Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 36 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,000,000 | +10,000 | +1.0% | $730.3M | 7.2% | $730.3 |
| Q4 2025 | 990,000 | 0 | — | $832.5M | 8.2% | $841.0 |
| Q3 2025 | 990,000 | 185,000 | -15.7% | $730.2M | 9.4% | $737.6 |
| Q2 2025 | 1,175,000 | 60,177 | -4.9% | $647.7M | 11.3% | $551.2 |
| Q1 2025 | 1,235,177 | 3,290 | -0.3% | $731.1M | 11.4% | $591.9 |
| Q4 2024 | 1,238,467 | 0 | — | $761.7M | 10.8% | $615.0 |
| Q3 2024 | 1,238,467 | 0 | — | $671.3M | 9.8% | $542.1 |
| Q2 2024 | 1,238,467 | 0 | — | $532.6M | 7.1% | $430.0 |
| Q1 2024 | 1,238,467 | +3,900 | +0.3% | $487.6M | 5.7% | $393.7 |
| Q4 2023 | 1,234,567 | +234,567 | +23.5% | $469.7M | 6.5% | $380.4 |
| Q3 2023 | 1,000,000 | 263,500 | -20.9% | $491.6M | 7.7% | $491.6 |
| Q2 2023 | 1,263,500 | 24,000 | -1.9% | $492.4M | 6.7% | $389.7 |
| Q1 2023 | 1,287,500 | +21,945 | +1.7% | $479.7M | 7.1% | $372.6 |
| Q4 2022 | 1,265,555 | 0 | — | $479.4M | 7.2% | $378.8 |
| Q3 2022 | 1,265,555 | 0 | — | $446.8M | 8.3% | $353.0 |
| Q2 2022 | 1,265,555 | +10,555 | +0.8% | $479.5M | 9.5% | $378.9 |
| Q1 2022 | 1,255,000 | +290,000 | +30.1% | $395.7M | 7.2% | $315.3 |
| Q4 2021 | 965,000 | +18,500 | +2.0% | $337.9M | 5.8% | $350.2 |
| Q3 2021 | 946,500 | 0 | — | $285.8M | 4.5% | $302.0 |
| Q2 2021 | 946,500 | +21,000 | +2.3% | $285.0M | 5.0% | $301.1 |
| Q1 2021 | 925,500 | +23,000 | +2.5% | $254.9M | 4.4% | $275.4 |
| Q4 2020 | 902,500 | 0 | — | $265.4M | 4.6% | $294.1 |
| Q3 2020 | 902,500 | 67,500 | -7.0% | $236.9M | 3.4% | $262.5 |
| Q2 2020 | 970,000 | +33,500 | +3.6% | $218.5M | 4.3% | $225.2 |
| Q1 2020 | 936,500 | 0 | — | $123.4M | 4.2% | $131.7 |
| Q4 2019 | 936,500 | +101,500 | +12.2% | $150.3M | 4.4% | $160.5 |
| Q3 2019 | 835,000 | 5,000 | -0.6% | $95.2M | 4.0% | $114.0 |
| Q2 2019 | 840,000 | 0 | — | $118.9M | 4.1% | $141.6 |
| Q1 2019 | 840,000 | 20,000 | -2.3% | $104.9M | 4.5% | $124.8 |
| Q4 2018 | 860,000 | +104,585 | +13.8% | $82.6M | 4.9% | $96.1 |
| Q3 2018 | 755,415 | 26,638 | -3.4% | $57.3M | 2.6% | $75.8 |
| Q2 2018 | 782,053 | 81,222 | -9.4% | $64.8M | 2.5% | $82.9 |
| Q1 2018 | 863,275 | +58,400 | +7.3% | $69.4M | 3.3% | $80.4 |
| Q4 2017 | 804,875 | +375,275 | +87.4% | $50.8M | 3.3% | $63.1 |
| Q3 2017 | 429,600 | +214,003 | +99.3% | $9.7M | 0.8% | $22.6 |
| Q2 2017 | 215,597 | — | — | $4.6M | 0.6% | $21.2 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did Avoro Capital Advisors LLC first disclose a ARGX position in 13F-HR filings?
Avoro Capital Advisors LLC first reported ARGENX SE (ARGX) on its 13F-HR filing for the period ending 2017-06-30 (Q2 2017). The position has appeared on 36 reported quarters within Pactolio's tracked window.
What was Avoro Capital Advisors LLC's most recent quarter-over-quarter share-count change in ARGX?
Between Q4 2025 and Q1 2026, Avoro Capital Advisors LLC added 10,000 shares of ARGX (+1.0%), bringing the total reported position to 1,000,000 shares at a market value of $730.3M.
Does the implied price-per-share represent Avoro Capital Advisors LLC's cost basis in ARGX?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.