Fund detail
Viking Global Investors (Halvorsen)
hedge-fund, active
Quarters
53
2026-06-30
$35.08B
Positions
90
2026-06-30
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. PUT/CALL rows are option exposure and are marked separately.
| # | Issuer | Value ↓ | Weight | Shares | Share Δ | Share Δ % | Prev Weight | First Held | Price | Est. Cost | Unrealized % | Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | ADAPTIVE BIOTECHNOLOGIES COR ADPT | $643.4M | 1.83% | 29,993,708 | +0 | +0.00% | 1.16% | 2019-06-30 | $21 | ~$48 | -55.59% | |
| 2 | TIC SOLUTIONS INC TIC | $289.8M | 0.83% | 35,824,562 | +0 | +0.00% | 0.66% | 2025-03-31 | $8 | ~$11 | -26.67% | |
| 3 | NEWAMSTERDAM PHARMA COMPANY | $142.5M | 0.41% | 4,203,567 | +0 | +0.00% | 0.38% | 2022-12-31 | $34 | ~$11 | +201.08% | |
| 4 | SIONNA THERAPEUTICS INC SION | $140.6M | 0.40% | 3,195,181 | +0 | +0.00% | 0.36% | 2025-03-31 | $44 | ~$11 | +310.30% | |
| 5 | PHARVARIS N V | $126.3M | 0.36% | 3,653,310 | +0 | +0.00% | 0.29% | 2021-03-31 | $35 | ~$24 | +46.39% | |
| 6 | DAMORA THERAPEUTICS INC DMRA | $60.1M | 0.17% | 2,311,082 | +0 | +0.00% | 0.17% | 2026-03-31 | $26 | ~$26 | +1.55% | |
| 7 | STANDARD BIOTOOLS INC LAB | $48.3M | 0.14% | 58,651,170 | +0 | +0.00% | 0.15% | 2024-03-31 | $1 | ~$3 | -69.64% | |
| 8 | GINKGO BIOWORKS HOLDINGS INC DNA | $35.4M | 0.10% | 3,577,128 | +0 | +0.00% | 0.06% | 2024-09-30 | $10 | ~$8 | +21.60% | |
| 9 | RALLYBIO CORP RLYB | $8.4M | 0.02% | 524,347 | +0 | +0.00% | 0.01% | 2026-03-31 | $16 | ~$9 | +71.76% | |
| 10 | PEPGEN INC PEPG | $6.3M | 0.02% | 3,482,434 | +0 | +0.00% | 0.02% | 2022-06-30 | $2 | ~$6 | -69.35% |