Boston Scientific Corporation
US ˙ NYSE ˙ US1011371077

SecurityBSX / Boston Scientific Corporation
InstitutionFranklin Resources Inc
Latest Disclosed Ownership14,498,741 shares
Latest Disclosed Value $ 909,795,997
Franklin Resources Inc ownership in BSX / Boston Scientific Corporation

On May 13, 2026 - Franklin Resources Inc filed a 13F-HR form disclosing ownership of 14,498,741 shares of Boston Scientific Corporation (US:BSX) valued at $909,795,998 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 5,676,082 shares of Boston Scientific Corporation. This represents a change in shares of 155.44% during the quarter. The current value of the position is $691,444,958 USD.

Franklin Resources Inc has a history of taking positions in derivatives of the underlying security (BSX) in the form of stock options. The firm currently holds call options representing 208,261 of underlying shares valued at $13,068,378 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

BSX / Boston Scientific Corporation Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F BOSTON SCIENTIFIC COM 101137107 14,498,741 8,822,659 155.44 909,796 68.10 0.2228
2026-02-11 2025-12-31 13F BOSTON SCIENTIFIC COM 101137107 5,676,082 -1,199,851 -17.45 541,214 -19.38 0.1328
2025-11-13 2025-09-30 13F BOSTON SCIENTIFIC COM 101137107 6,875,933 -708,747 -9.34 671,297 -17.60 0.1674
2025-08-12 2025-06-30 13F BOSTON SCIENTIFIC COM 101137107 7,584,680 135,266 1.82 814,670 8.41 0.2160
2025-05-13 2025-03-31 13F BOSTON SCIENTIFIC COM 101137107 7,449,414 -9,090,074 -54.96 751,497 -49.13 0.2162
2025-02-12 2024-12-31 13F BOSTON SCIENTIFIC COM 101137107 16,539,488 832,386 5.30 1,477,307 7.27 0.4102
2024-11-27 2024-09-30 13F/A-1 BOSTON SCIENTIFIC COM 101137107 15,707,102 -1,455,465 -8.48 1,377,217 4.20 0.3868
2024-11-12 2024-09-30 13F BOSTON SCIENTIFIC COM 101137107 15,859,721 -1,302,846 1,388,519 0.0669
2024-08-14 2024-06-30 13F BOSTON SCIENTIFIC COM 101137107 17,162,567 1,486,037 9.48 1,321,689 23.10 0.4063
2024-05-13 2024-03-31 13F BOSTON SCIENTIFIC COM 101137107 15,676,530 14,154,402 929.91 1,073,686 1,120.18 0.3400
2024-02-09 2023-12-31 13F BOSTON SCIENTIFIC COM 101137107 1,522,128 31,586 2.12 87,994 11.81 0.0411
2023-11-13 2023-09-30 13F BOSTON SCIENTIFIC COM 101137107 1,490,542 16,619 1.13 78,701 -1.28 0.0400
2023-08-11 2023-06-30 13F BOSTON SCIENTIFIC COM 101137107 1,473,923 1,360,294 1,197.14 79,724 1,302.60 0.0379
2023-05-12 2023-03-31 13F BOSTON SCIENTIFIC COM 101137107 113,629 -500 -0.44 5,685 7.65 0.0029
2023-02-10 2022-12-31 13F BOSTON SCIENTIFIC COM 101137107 114,129 5,968 5.52 5,281 26.04 0.0027
2022-11-14 2022-09-30 13F BOSTON SCIENTIFIC COM 101137107 108,161 14,851 15.92 4,189 20.44 0.0023
2022-08-11 2022-06-30 13F BOSTON SCIENTIFIC COM 101137107 93,310 -1,171 -1.24 3,478 -16.91 0.0017
2022-05-13 2022-03-31 13F BOSTON SCIENTIFIC COM 101137107 94,481 2,612 2.84 4,186 7.25 0.0017
2022-02-11 2021-12-31 13F BOSTON SCIENTIFIC COM 101137107 91,869 5,497 6.36 3,903 4.14 0.0014
2021-11-12 2021-09-30 13F BOSTON SCIENTIFIC COM 101137107 86,372 46,353 115.83 3,748 119.05 0.0014
2021-08-13 2021-06-30 13F BOSTON SCIENTIFIC COM 101137107 40,019 -777 -1.90 1,711 8.57 0.0007
2021-05-13 2021-03-31 13F BOSTON SCIENTIFIC COM 101137107 40,796 -201 -0.49 1,576 6.92 0.0006
2021-02-10 2020-12-31 13F BOSTON SCIENTIFIC COM 101137107 40,997 1,009 2.52 1,474 -3.53 0.0006
2020-11-12 2020-09-30 13F BOSTON SCIENTIFIC COM 101137107 39,988 23,556 143.35 1,528 142.16 0.0007
2020-08-13 2020-06-30 13F BOSTON SCIENTIFIC COM 101137107 16,432 1,042 6.77 631 25.70 0.0003
2020-05-13 2020-03-31 13F BOSTON SCIENTIFIC COM 101137107 15,390 1,325 9.42 502 -21.07 0.0003
2020-03-11 2019-12-31 13F/A-1 BOSTON SCIENTIFIC COM 101137107 14,065 2,867 25.60 636 39.78 0.0003
2020-02-12 2019-12-31 13F BOSTON SCIENTIFIC COM 101137107 14,065 2,867 636 80.3355
2019-11-14 2019-09-30 13F BOSTON SCIENTIFIC COM 101137107 11,198 -330 -2.86 455 -8.08 0.0002
2019-08-14 2019-06-30 13F BOSTON SCIENTIFIC COM 101137107 11,528 -1,825 -13.67 495 -3.32 0.0003
2019-05-15 2019-03-31 13F/A-1 BOSTON SCIENTIFIC COM 101137107 13,353 13,353 512 0.0003
2019-05-14 2019-03-31 13F BOSTON SCIENTIFIC COM 101137107 13,353 512 0.0003
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-13 2026-03-31 13F BOSTON SCIENTIFIC COM Call 208,261 13,068 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.