BlackRock Health Sciences Trust
US ˙ NYSE ˙ US09250W1071

SecurityBME / BlackRock Health Sciences Trust
InstitutionCalamos Advisors LLC
Latest Disclosed Ownership14,619 shares
Latest Disclosed Value $ 562,978
Calamos Advisors LLC reports 43.82% decrease in ownership of BME / BlackRock Health Sciences Trust

On May 4, 2026 - Calamos Advisors LLC filed a 13F-HR form disclosing ownership of 14,619 shares of BlackRock Health Sciences Trust (US:BME) valued at $562,978 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 26,020 shares of BlackRock Health Sciences Trust. This represents a change in shares of -43.82% during the quarter. The current value of the position is $573,211 USD.

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)
2026-05-04 2026-03-31 13F BLACKROCK HEALTH SCIENCES TR COM 09250W107 14,619 -11,401 -43.82 563 -47.48 0.0020
2026-01-29 2025-12-31 13F BLACKROCK HEALTH SCIENCES TR COM 09250W107 26,020 10,135 63.80 1,070 81.05 0.0040
2025-10-20 2025-09-30 13F BLACKROCK HEALTH SCIENCES TR COM 09250W107 15,885 10,121 175.59 591 181.43 0.0022
2025-08-08 2025-06-30 13F BLACKROCK HEALTH SCIENCES TR COM 09250W107 5,764 -726 -11.19 210 -16.00 0.0008
2025-04-29 2025-03-31 13F BLACKROCK HEALTH SCIENCES TR COM 09250W107 6,490 6,490 251 0.0011
2025-01-24 2024-12-31 13F BLACKROCK HEALTH SCIENCES TR COM 09250W107 0 -5,188 -100.00 0 -100.00
2024-11-07 2024-09-30 13F BLACKROCK HEALTH SCIENCES TR COM 09250W107 5,188 -2,696 -34.20 218 -32.61 0.0009
2024-07-25 2024-06-30 13F BLACKROCK HEALTH SCIENCES TR COM 09250W107 7,884 2,500 46.43 322 44.39 0.0014
2024-05-08 2024-03-31 13F BLACKROCK HEALTH SCIENCES TR COM 09250W107 5,384 5,384 223 0.0011
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.