Ticker · CUSIP 09260K101

BSTZ

CEF
BLACKROCK SCIENCE & TECHNOLO
···Share
Holders (tracked)
2
Combined shares
34,118
Combined value
$771.4K
Last close
$24.97
Quarter
2025Q4
Price · 1Y$24.97+10.12 (+68.11%)H $24.97 · L $14.41 · Avg Vol 226K
Position opened
$14.00$16.00$18.00$20.00$22.00$24.00VolJul 25Oct 25Jan 26Apr 26
Tracked holders · last 8 quarters
Flat over the last 8 quarters.
212023Q22025Q4
Price is +10.4% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

3 events
  1. Ken Griffin (Citadel Advisors) added2026-02-17
    +6,893 shares · 2025Q4
    Position
  2. AQR Capital Management trimmed2026-02-17
    −1,611 shares · 2025Q4
    Position
  3. AQR Capital Management trimmed2025-11-14
    −4,589 shares · 2025Q3
    Position

Insider activity

No insider transactions in the last 30 days.
View full insider history for BSTZ →
Follow-the-investor returns
If you'd copied each holder of BSTZ…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
Ken Griffin (Citadel Advisors)2022Q4$18.22+37.0%$464K
AQR Capital Management2025Q2$20.75+20.3%$387K

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.
New positions0
—
Added to1
Trimmed1
Exited0
—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2021Q1
1
$178K
2021Q2
1
$209K
2021Q3
1
$193K
2022Q1
1
$147K
2022Q2
1
$98K
2022Q3
1
$88K
2022Q4
2
$329K
2023Q1
1
$139K
2023Q2
1
$91K
2023Q3
1
$83K
2023Q4
2
$286K
2024Q1
2
$309K
2024Q2
1
$100K
2025Q2
1
$451K
2025Q3
2
$639K
2025Q4
2
$771K

Who owns BSTZ

2 super-investors · 2025Q4
Tracked stake
34.1K
shares
Combined value
$771K
% of shares outstanding
—
shares-out unknown
Quarter action mix
Added1Trim1
#ManagerSharesValue
1Ken Griffin
Citadel Advisors
18.6K$421K
2AQR Capital Management15.5K$351K

Recent moves

11 transactions
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