BlackRock Science and Technology Trust
US ˙ NYSE ˙ US09258G1040

SecurityBST / BlackRock Science and Technology Trust
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership140,136 shares
Latest Disclosed Value $ 5,094,039
Advisor Group Holdings, Inc. reports 7.75% decrease in ownership of BST / BlackRock Science and Technology Trust

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 140,136 shares of BlackRock Science and Technology Trust (US:BST) valued at $5,093,944 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 151,911 shares of BlackRock Science and Technology Trust. This represents a change in shares of -7.75% during the quarter. The current value of the position is $6,449,059 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)
2026-05-15 2026-03-31 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 140,136 -11,775 -7.75 5,094 -17.28 0.0043
2026-02-17 2025-12-31 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 151,911 -3,138 -2.02 6,159 -0.58 0.0090
2025-11-14 2025-09-30 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 155,049 6,791 4.58 6,195 9.45 0.0087
2025-09-04 2025-06-30 13F/A-1 BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 148,258 12,948 9.57 5,659 26.77 0.0101
2025-08-13 2025-06-30 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 120,777 -14,533 4,428 0.0051
2025-05-12 2025-03-31 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 135,310 21,351 18.74 4,464 7.15 0.0099
2025-06-06 2024-12-31 13F/A-1 BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 113,959 9,657 9.26 4,166 12.72 0.0094
2025-02-07 2024-12-31 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 98,621 -5,681 3,497 0.0089
2024-11-13 2024-09-30 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 104,302 -4,045 -3.73 3,697 -9.41 0.0083
2024-08-13 2024-06-30 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 108,347 -2,894 -2.60 4,080 -0.66 0.0096
2024-05-10 2024-03-31 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 111,241 46 0.04 4,107 9.75 0.0092
2024-02-12 2023-12-31 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 111,195 -90,990 -45.00 3,743 -41.07 0.0065
2023-11-13 2023-09-30 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 202,185 83,101 69.78 6,351 54.84 0.0094
2023-08-21 2023-06-30 13F/A-1 BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 119,084 10,630 9.80 4,101 16.97 0.0074
2023-08-10 2023-06-30 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 119,084 10,630 4,101 0.0011
2023-05-12 2023-03-31 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 108,454 9,016 9.07 3,507 24.28 0.0066
2023-02-10 2022-12-31 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 99,438 13,711 15.99 2,822 11.99 0.0057
2022-11-14 2022-09-30 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 85,727 5,180 6.43 2,519 -3.85 0.0058
2022-08-10 2022-06-30 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 80,547 7,134 9.72 2,620 -27.86 0.0058
2022-05-04 2022-03-31 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 73,413 6,668 9.99 3,632 8.84 0.0070
2022-02-03 2021-12-31 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 66,745 711 1.08 3,337 -3.13 0.0063
2021-11-05 2021-09-30 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 66,034 -34,758 -34.48 3,445 -42.64 0.0072
2021-08-02 2021-06-30 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 100,792 5,675 5.97 6,006 16.73 0.0130
2021-08-02 2021-06-30 13F BLACKROCK SCIENCE & TECHNOLO RIGHT 07/14/2021 09258G112 101,956 6,839 67 0.0001
2021-05-13 2021-03-31 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 95,117 23,184 32.23 5,145 34.16 0.0124
2021-02-10 2020-12-31 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 71,933 10,851 17.76 3,835 45.82 0.0102
2020-11-12 2020-09-30 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 61,082 18,647 43.94 2,630 63.86 0.0079
2020-08-14 2020-06-30 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 42,435 81 0.19 1,605 31.99 0.0054
2020-05-18 2020-03-31 13F BLACKROCK SCIENCE & TECHNOLO SHS 09258G104 42,354 42,354 1,216 0.0050
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.