Fund detail
Viking Global Investors (Halvorsen)
hedge-fund, active
Quarters
52
2026-03-31
$35.75B
Positions
77
2026-03-31
2025-12-31
2025-09-30
2025-06-30
2025-03-31
2024-12-31
2024-09-30
2024-06-30
2024-03-31
2023-12-31
2023-09-30
2023-06-30
2023-03-31
2022-12-31
2022-09-30
2022-06-30
2022-03-31
2021-12-31
2021-09-30
2021-06-30
2021-03-31
2020-12-31
2020-09-30
2020-06-30
2020-03-31
2019-12-31
2019-09-30
2019-06-30
2019-03-31
2018-12-31
2018-09-30
2018-06-30
2018-03-31
2017-12-31
2017-09-30
2017-06-30
2017-03-31
2016-12-31
2016-09-30
2016-06-30
2016-03-31
2015-12-31
2015-09-30
2015-06-30
2015-03-31
2014-12-31
2014-09-30
2014-06-30
2014-03-31
2013-12-31
2013-09-30
2013-06-30
Price is the latest implied close from the selected quarter's 13F (value ÷ shares). Est. Cost is a running average that assumes each quarter's trades cleared near the midpoint of consecutive 13F closes (or yfinance VWAP when available). Most accurate for slow accumulators, least accurate for activists who build positions in a few days.
| # | Issuer | Value ↑ | Weight | Shares | Share Δ | Share Δ % | Prev Weight | First Held | Price | Est. Cost | Unrealized % | Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | PEPGEN INC PEPG | $6.2M | 0.02% | 3,482,434 | +0 | +0.00% | 0.06% | 2022-06-30 | $2 | ~$6 | -69.86% | |
| 2 | GINKGO BIOWORKS HOLDINGS INC DNA | $21.9M | 0.06% | 3,577,128 | +0 | +0.00% | 0.08% | 2024-09-30 | $6 | ~$8 | -24.79% | |
| 3 | TREVI THERAPEUTICS INC TRVI | $38.2M | 0.11% | 3,198,644 | +0 | +0.00% | 0.11% | 2022-09-30 | $12 | ~$6 | +114.02% | |
| 4 | STANDARD BIOTOOLS INC LAB | $53.9M | 0.15% | 58,651,170 | +0 | +0.00% | 0.20% | 2024-03-31 | $1 | ~$3 | -66.08% | |
| 5 | INHIBRX BIOSCIENCES INC INBX | $96.7M | 0.27% | 1,437,705 | +0 | +0.00% | 0.30% | 2024-06-30 | $67 | ~$14 | +374.45% | |
| 6 | PHARVARIS N V | $103.2M | 0.29% | 3,653,310 | +0 | +0.00% | 0.27% | 2021-03-31 | $28 | ~$24 | +19.59% | |
| 7 | SIONNA THERAPEUTICS INC SION | $128.1M | 0.36% | 3,195,181 | +0 | +0.00% | 0.35% | 2025-03-31 | $40 | ~$11 | +273.93% | |
| 8 | ORUKA THERAPEUTICS INC ORKA | $130.8M | 0.37% | 2,666,690 | +0 | +0.00% | 0.21% | 2025-09-30 | $49 | ~$19 | +155.07% | |
| 9 | NEWAMSTERDAM PHARMA COMPANY | $134.6M | 0.38% | 4,203,567 | +0 | +0.00% | 0.39% | 2022-12-31 | $32 | ~$11 | +184.38% | |
| 10 | ADAPTIVE BIOTECHNOLOGIES COR ADPT | $416.3M | 1.16% | 29,993,708 | +0 | +0.00% | 1.29% | 2019-06-30 | $14 | ~$48 | -71.26% |