Andreas Halvorsen's BSX Position Overview
Andreas Halvorsen (via Viking Global Investors Lp) currently holds 2.51 M shares of Boston Scientific Corporation (BSX) worth $239.31 M, representing 0.64% of the portfolio. First purchased in 2015-Q3, this long-term strategic position has been held for 32 quarters.
Based on 13F filings, Andreas Halvorsen has maintained a strategic position in BSX, demonstrating sustained confidence in this investment. Largest addition occurred in Q1 2020, adding 13.32 M shares. Largest reduction occurred in Q2 2020, reducing 13.36 M shares.
Analysis based on 13F filings available since 2013 Q2
Andreas Halvorsen's Boston Scientific Corporation (BSX) Holding Value Over Time
Track share changes against reported price movement
Quarterly Boston Scientific Corporation (BSX) Trades by Andreas Halvorsen
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | -131,874 | Reduce 4.99% | 2.51 M | $95.35 |
| Q3 2025 | -404,082 | Reduce 13.27% | 2.64 M | $97.63 |
| Q2 2025 | +669,000 | Add 28.15% | 3.05 M | $107.41 |
| Q1 2025 | +204,556 | Add 9.42% | 2.38 M | $100.88 |
| Q4 2024 | +1.2 M | Add 124.58% | 2.17 M | $89.32 |
| Q3 2024 | +967,210 | New Buy | 967,210 | $83.80 |
| Q2 2024 | -1.72 M | Sold Out | 0 | $0.00 |
| Q1 2024 | -543,006 | Reduce 23.94% | 1.72 M | $68.49 |
| Q4 2023 | +1.16 M | Add 104.25% | 2.27 M | $57.81 |
| Q3 2023 | +1.11 M | New Buy | 1.11 M | $52.80 |
| Q2 2023 | -1.14 M | Sold Out | 0 | $0.00 |
| Q1 2023 | -8.39 M | Reduce 88.07% | 1.14 M | $50.03 |
| Q4 2022 | -6.63 M | Reduce 41.05% | 9.53 M | $46.27 |
| Q3 2022 | +1.51 M | Add 10.30% | 16.16 M | $38.73 |
| Q2 2022 | +1.81 M | Add 14.13% | 14.65 M | $37.27 |
| Q1 2022 | -6.12 M | Reduce 32.29% | 12.84 M | $44.29 |
| Q4 2021 | +12.1 M | Add 176.15% | 18.96 M | $42.48 |
| Q3 2021 | -6.45 M | Reduce 48.43% | 6.87 M | $43.39 |
| Q2 2021 | -4.58 M | Reduce 25.59% | 13.32 M | $42.76 |
| Q1 2021 | -12.09 M | Reduce 40.33% | 17.9 M | $38.65 |
| Q4 2020 | +11.16 M | Add 59.27% | 29.99 M | $35.95 |
| Q3 2020 | +372,457 | Add 2.02% | 18.83 M | $38.21 |
| Q2 2020 | -13.36 M | Reduce 41.99% | 18.46 M | $35.11 |
| Q1 2020 | +13.32 M | Add 72.06% | 31.82 M | $32.63 |
| Q4 2019 | +8.08 M | Add 77.53% | 18.49 M | $45.22 |
| Q3 2019 | +1.22 M | Add 13.28% | 10.42 M | $40.69 |
| Q2 2019 | +5.97 M | Add 185.53% | 9.2 M | $42.98 |
| Q1 2019 | -1.98 M | Reduce 38.09% | 3.22 M | $38.38 |
| Q4 2018 | +2.05 M | Add 64.82% | 5.2 M | $35.34 |
| Q3 2018 | +3.16 M | New Buy | 3.16 M | $38.50 |
| Q4 2015 | -1.61 M | Sold Out | 0 | $0.00 |
| Q3 2015 | +1.61 M | New Buy | 1.61 M | $16.41 |
Andreas Halvorsen's Boston Scientific Corporation Investment FAQs
Andreas Halvorsen first purchased Boston Scientific Corporation (BSX) in Q3 2015, acquiring 1,611,935 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Andreas Halvorsen has held Boston Scientific Corporation (BSX) for 32 quarters since Q3 2015.
Andreas Halvorsen's largest addition to Boston Scientific Corporation (BSX) was in Q1 2020, adding 31,816,197 shares worth $1.04 B.
According to the latest 13F filing for Q4 2025, Andreas Halvorsen's firm, Viking Global Investors Lp, owns 2,509,808 shares of Boston Scientific Corporation (BSX), valued at approximately $239.31 M.
As of the Q4 2025 filing, Boston Scientific Corporation (BSX) represents approximately 0.64% of Andreas Halvorsen's publicly disclosed stock portfolio, making it one of their key holdings.
Andreas Halvorsen's peak holding in Boston Scientific Corporation (BSX) was 31,816,197 shares, as reported at the end of Q1 2020.