BLACKROCK INC

Ticker: BLK CUSIP: 09290D101 Class: Common Stock

Great Diamond Partners, LLC's Holding History (CIK: 0001801112)

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

Q4 2025

Shares 2,791 Value ($000) $2,987 Avg Close $1089.41 Range $985.78 - $1214.03

Q3 2025

Shares 2,781 Value ($000) $3,242 Avg Close $1108.77 Range $1023.93 - $1177.77

Q2 2025

Shares 2,783 Value ($000) $2,920 Avg Close $933.09 Range $762.34 - $1044.14

Q1 2025

Shares 2,776 Value ($000) $2,627 Avg Close $961.85 Range $885.02 - $1062.44

Q4 2024

Shares 2,975 Value ($000) $3,050 Avg Close $991.05 Range $896.06 - $1060.71

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	2,791	$2,987	$1089.41	$985.78 - $1214.03
Q3 2025	2,781	$3,242	$1108.77	$1023.93 - $1177.77
Q2 2025	2,783	$2,920	$933.09	$762.34 - $1044.14
Q1 2025	2,776	$2,627	$961.85	$885.02 - $1062.44
Q4 2024	2,975	$3,050	$991.05	$896.06 - $1060.71