Fund detail
Viking Global Investors (Halvorsen)
hedge-fund, active
Quarters
52
2025-12-31
$37.68B
Positions
76
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 | ADAPTIVE BIOTECHNOLOGIES COR ADPT | $487.1M | 1.29% | 29,993,708 | +0 | +0.00% | 1.17% | 2019-06-30 | $16 | ~$48 | -66.38% | |
| 2 | TIC SOLUTIONS INC TIC | $347.4M | 0.92% | 34,360,000 | +0 | +0.00% | 1.19% | 2025-03-31 | $10 | ~$11 | -9.08% | |
| 3 | SIONNA THERAPEUTICS INC SION | $131.4M | 0.35% | 3,195,181 | +0 | +0.00% | 0.24% | 2025-03-31 | $41 | ~$11 | +283.72% | |
| 4 | PHARVARIS N V | $101.4M | 0.27% | 3,653,310 | +0 | +0.00% | 0.24% | 2021-03-31 | $28 | ~$24 | +17.47% | |
| 5 | ORUKA THERAPEUTICS INC ORKA | $80.8M | 0.21% | 2,666,690 | +0 | +0.00% | 0.13% | 2025-09-30 | $30 | ~$19 | +57.62% | |
| 6 | STANDARD BIOTOOLS INC LAB | $75.1M | 0.20% | 58,651,170 | +0 | +0.00% | 0.20% | 2024-03-31 | $1 | ~$3 | -52.77% | |
| 7 | GINKGO BIOWORKS HOLDINGS INC DNA | $29.7M | 0.08% | 3,577,128 | +0 | +0.00% | 0.14% | 2024-09-30 | $8 | ~$8 | +1.96% | |
| 8 | PEPGEN INC PEPG | $22.7M | 0.06% | 3,482,434 | +0 | +0.00% | 0.04% | 2022-06-30 | $7 | ~$6 | +10.85% | |
| 9 | RALLYBIO CORP | $2.9M | 0.01% | 4,194,777 | +0 | +0.00% | 0.01% | 2021-09-30 | $1 | ~$18 | -96.10% |