BLACKROCK SCIENCE & TECHNOLO

CUSIP: 09258G104 Class: SHS

Thomas J. Herzfeld Advisors, Inc.'s Holding History (CIK: 0001509510)

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

Q4 2017
Shares 333,742 Value ($000) $8,908 Avg Close — Range —
Q3 2017
Shares 551,798 Value ($000) $13,480 Avg Close — Range —
Q2 2017
Shares 530,729 Value ($000) $11,787 Avg Close — Range —
Q1 2017
Shares 570,987 Value ($000) $12,082 Avg Close — Range —
Q4 2016
Shares 551,597 Value ($000) $9,896 Avg Close — Range —
Q3 2016
Shares 511,548 Value ($000) $9,530 Avg Close — Range —
Q2 2016
Shares 483,899 Value ($000) $7,984 Avg Close — Range —
Q1 2016
Shares 494,289 Value ($000) $8,403 Avg Close — Range —
Q4 2015
Shares 515,901 Value ($000) $8,930 Avg Close — Range —
Q3 2015
Shares 471,704 Value ($000) $7,477 Avg Close — Range —
Q2 2015
Shares 436,999 Value ($000) $7,625 Avg Close — Range —
Q1 2015
Shares 312,658 Value ($000) $5,575 Avg Close — Range —
Q4 2014
Shares 135,326 Value ($000) $2,380 Avg Close — Range —