Boston Scientific Corporation
MX ˙ BMV ˙ FR0010424135
SecurityMX:BSX / Boston Scientific Corporation
InstitutionCWA Asset Management Group, LLC
Latest Disclosed Ownership9,005 shares
Latest Disclosed Value $ 565,064
CWA Asset Management Group, LLC reports 13.26% decrease in ownership of BSX / Boston Scientific Corporation

On April 20, 2026 - CWA Asset Management Group, LLC filed a 13F-HR form disclosing ownership of 9,005 shares of Boston Scientific Corporation (MX:BSX) valued at $565,064 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 7, 2026 disclosing 10,382 shares of Boston Scientific Corporation. This represents a change in shares of -13.26% during the quarter.

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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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)
2026-04-20 2026-03-31 13F BOSTON SCIENTIFIC COM 101137107 9,005 -1,377 -13.26 565 -42.87 0.0191
2026-01-07 2025-12-31 13F BOSTON SCIENTIFIC COM 101137107 10,382 -1,176 -10.17 990 -12.32 0.0357
2025-10-22 2025-09-30 13F BOSTON SCIENTIFIC COM 101137107 11,558 349 3.11 1,128 -6.23 0.0418
2025-07-17 2025-06-30 13F BOSTON SCIENTIFIC COM 101137107 11,209 -635 -5.36 1,204 0.75 0.0508
2025-04-21 2025-03-31 13F BOSTON SCIENTIFIC COM 101137107 11,844 3,563 43.03 1,195 61.57 0.0573
2025-01-06 2024-12-31 13F BOSTON SCIENTIFIC COM 101137107 8,281 336 4.23 740 11.13 0.0373
2024-11-01 2024-09-30 13F BOSTON SCIENTIFIC COM 101137107 7,945 4,751 148.75 666 205.05 0.0354
2024-05-13 2024-03-31 13F BOSTON SCIENTIFIC COM 101137107 3,194 -2,731 -46.09 219 -36.26 0.0133
2024-02-13 2023-12-31 13F BOSTON SCIENTIFIC COM 101137107 5,925 5,925 343 0.0235
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.