Fund detail
Viking Global Investors (Halvorsen)
hedge-fund, active
Quarters
52
2014-12-31
$21.78B
Positions
62
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 | ILLUMINA INC ILMN | $1.53B | 7.03% | 8,293,405 | -357,265 | -4.13% | 5.69% | 2013-12-31 | $185 | ~$129 | +42.62% | |
| 2 | VALEANT PHARMACEUTICALS INTL | $1.30B | 5.96% | 9,077,007 | -890,683 | -8.94% | 5.25% | 2013-06-30 | $143 | ~$98 | +45.41% | |
| 3 | PIONEER NAT RES CO PXDEUR | $980.5M | 4.50% | 6,586,936 | -196,705 | -2.90% | 5.37% | 2014-03-31 | $149 | ~$205 | -27.49% | |
| 4 | THERMO FISHER SCIENTIFIC INC TMO | $725.0M | 3.33% | 5,786,510 | -2,189,992 | -27.46% | 3.90% | 2013-06-30 | $125 | ~$85 | +46.88% | |
| 5 | MICRON TECHNOLOGY INC MU | $705.9M | 3.24% | 20,163,744 | -402,903 | -1.96% | 2.83% | 2013-06-30 | $35 | ~$18 | +93.44% | |
| 6 | MOHAWK INDS INC MHK | $614.0M | 2.82% | 3,952,060 | -1,724,988 | -30.39% | 3.07% | 2013-12-31 | $155 | ~$140 | +10.87% | |
| 7 | CITIGROUP INC C | $607.1M | 2.79% | 11,220,274 | -3,683,847 | -24.72% | 3.10% | 2013-12-31 | $54 | ~$52 | +4.05% | |
| 8 | BANK NEW YORK MELLON CORP BK | $481.4M | 2.21% | 11,866,061 | -4,869,924 | -29.10% | 2.60% | 2014-09-30 | $41 | ~$39 | +4.75% | |
| 9 | ALLERGAN INC | $418.0M | 1.92% | 1,966,112 | -313,624 | -13.76% | 1.63% | 2013-12-31 | $213 | ~$152 | +40.20% | |
| 10 | GOOGLE INC | $394.0M | 1.81% | 742,461 | -181,039 | -19.60% | 2.18% | 2014-09-30 | $531 | ~$588 | -9.81% | |
| 11 | KANSAS CITY SOUTHERN KSUEUR | $390.2M | 1.79% | 3,197,766 | -1,057,550 | -24.85% | 2.07% | 2014-03-31 | $122 | ~$106 | +14.72% | |
| 12 | ALIBABA GROUP HLDG LTD BABA | $385.5M | 1.77% | 3,708,686 | -7,678,840 | -67.43% | 4.06% | 2014-09-30 | $104 | ~$89 | +16.98% | |
| 13 | MASTERCARD INC MA | $370.8M | 1.70% | 4,304,154 | -8,752,197 | -67.03% | 3.88% | 2013-06-30 | $86 | ~$66 | +29.93% | |
| 14 | LYONDELLBASELL INDUSTRIES N | $321.5M | 1.48% | 4,049,281 | -3,075,890 | -43.17% | 3.11% | 2013-06-30 | $79 | ~$73 | +8.40% | |
| 15 | VISA INC V | $240.3M | 1.10% | 916,606 | -2,119,013 | -69.80% | 2.60% | 2013-06-30 | $262 | ~$189 | +38.47% | |
| 16 | SALIX PHARMACEUTICALS INC | $199.8M | 0.92% | 1,738,104 | -981,434 | -36.09% | 1.71% | 2014-03-31 | $115 | ~$108 | +6.25% | |
| 17 | ACADIA PHARMACEUTICALS INC ACAD | $93.9M | 0.43% | 2,956,266 | -1,368,624 | -31.65% | 0.43% | 2013-12-31 | $32 | ~$25 | +29.33% | |
| 18 | ALEXION PHARMACEUTICALS INC ALXN | $72.2M | 0.33% | 390,271 | -1,808,180 | -82.25% | 1.46% | 2013-06-30 | $185 | ~$103 | +79.58% | |
| 19 | NEWFIELD EXPL CO | $20.8M | 0.10% | 767,638 | -8,255,551 | -91.49% | 1.34% | 2014-06-30 | $27 | ~$43 | -36.57% | |
| 20 | SANDISK CORP | $19.9M | 0.09% | 202,840 | -1,969,430 | -90.66% | 0.85% | 2013-06-30 | $98 | ~$70 | +39.20% |