BLACKROCK SCIENCE & TECHNOLO

CUSIP: 09258G104 Class: SHS

Round Rock Advisors, LLC's Holding History (CIK: 0001846991)

Note: Option positions (PUT/CALL) are excluded.

Q1 2022
Shares 5,150 Value ($000) $223 Avg Close — Range —
Q4 2021
Shares 5,150 Value ($000) $257 Avg Close — Range —