Fund detail
Viking Global Investors (Halvorsen)
hedge-fund, active
Quarters
52
2015-06-30
$26.47B
Positions
56
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 | WALGREENS BOOTS ALLIANCE INC WBA | $2.08B | 7.86% | 24,625,113 | +10,022,410 | +68.63% | 4.79% | 2014-12-31 | $84 | ~$80 | +6.08% | |
| 2 | GOOGLE INC | $1.48B | 5.58% | 2,736,152 | +1,097,703 | +67.00% | 3.52% | 2014-09-30 | $540 | ~$557 | -3.04% | |
| 3 | LYONDELLBASELL INDUSTRIES N | $1.11B | 4.19% | 10,726,384 | +3,010,458 | +39.02% | 2.62% | 2013-06-30 | $104 | ~$83 | +24.62% | |
| 4 | VALEANT PHARMACEUTICALS INTL | $1.03B | 3.87% | 4,616,738 | +558,395 | +13.76% | 3.12% | 2013-06-30 | $222 | ~$112 | +98.41% | |
| 5 | PIONEER NAT RES CO PXDEUR | $886.4M | 3.35% | 6,391,252 | +582,045 | +10.02% | 3.68% | 2014-03-31 | $139 | ~$200 | -30.78% | |
| 6 | METLIFE INC MET | $659.6M | 2.49% | 11,780,357 | +5,116,894 | +76.79% | 1.31% | 2013-06-30 | $56 | ~$52 | +7.77% | |
| 7 | MALLINCKRODT PUB LTD CO | $637.5M | 2.41% | 5,415,671 | +1,878,341 | +53.10% | 1.74% | 2015-03-31 | $118 | ~$125 | -5.90% | |
| 8 | HUMANA INC HUM | $613.4M | 2.32% | 3,206,839 | +1,826,608 | +132.34% | 0.95% | 2013-06-30 | $191 | ~$162 | +18.43% | |
| 9 | GOOGLE INC | $597.3M | 2.26% | 1,147,549 | +306,362 | +36.42% | 1.79% | 2015-03-31 | $521 | ~$544 | -4.38% | |
| 10 | ENVISION HEALTHCARE HLDGS IN | $485.7M | 1.84% | 12,303,668 | +5,452,124 | +79.58% | 1.02% | 2015-03-31 | $39 | ~$39 | +2.28% | |
| 11 | CROWN CASTLE INTL CORP NEW CCI | $444.1M | 1.68% | 5,530,352 | +976,982 | +21.46% | 1.46% | 2014-12-31 | $80 | ~$79 | +1.36% | |
| 12 | CTRIP COM INTL LTD CTRPUSD | $418.6M | 1.58% | 5,764,514 | +1,541,620 | +36.51% | 0.96% | 2014-06-30 | $73 | ~$58 | +24.44% | |
| 13 | VERTEX PHARMACEUTICALS INC VRTX | $222.9M | 0.84% | 1,805,186 | +35,036 | +1.98% | 0.81% | 2014-12-31 | $123 | ~$119 | +4.11% | |
| 14 | RECEPTOS INC | $219.9M | 0.83% | 1,156,900 | +205,822 | +21.64% | 0.61% | 2014-12-31 | $190 | ~$140 | +35.43% | |
| 15 | AON PLC | $190.7M | 0.72% | 1,912,946 | +1,059,185 | +124.06% | 0.32% | 2014-09-30 | $100 | ~$93 | +6.80% | |
| 16 | AVIS BUDGET GROUP CAR | $190.4M | 0.72% | 4,320,377 | +1,493,126 | +52.81% | 0.65% | 2014-12-31 | $44 | ~$61 | -28.00% | |
| 17 | ESPERION THERAPEUTICS INC NE ESPR | $114.1M | 0.43% | 1,395,107 | +1,258,188 | +918.93% | 0.05% | 2015-03-31 | $82 | ~$88 | -6.79% | |
| 18 | QUNAR CAYMAN IS LTD | $108.5M | 0.41% | 2,531,989 | +1,521,452 | +150.56% | 0.16% | 2014-12-31 | $43 | ~$37 | +17.03% | |
| 19 | PROQR THRAPEUTICS N V | $9.9M | 0.04% | 595,307 | +186,899 | +45.76% | 0.03% | 2015-03-31 | $17 | ~$21 | -20.85% |