BERKSHIRE HATHAWAY INC DEL

Ticker: BRK/B CUSIP: 084670702 Class: Common Stock

Mainstream Capital Management LLC's Holding History (CIK: 0002043084)

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

Q4 2025

Shares 5,390 Value ($000) $2,709 Avg Close $497.53 Range $473.15 - $516.85

Q3 2025

Shares 5,477 Value ($000) $2,754 Avg Close $484.36 Range $455.19 - $507.66

Q2 2025

Shares 5,296 Value ($000) $2,573 Avg Close $507.86 Range $462.10 - $542.07

Q1 2025

Shares 5,389 Value ($000) $2,870 Avg Close $486.15 Range $440.10 - $537.63

Q4 2024

Shares 5,246 Value ($000) $2,378 Avg Close $461.73 Range $437.90 - $491.67

Q3 2024

Shares 5,181 Value ($000) $2,385 Avg Close $442.18 Range $403.82 - $484.82

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	5,390	$2,709	$497.53	$473.15 - $516.85
Q3 2025	5,477	$2,754	$484.36	$455.19 - $507.66
Q2 2025	5,296	$2,573	$507.86	$462.10 - $542.07
Q1 2025	5,389	$2,870	$486.15	$440.10 - $537.63
Q4 2024	5,246	$2,378	$461.73	$437.90 - $491.67
Q3 2024	5,181	$2,385	$442.18	$403.82 - $484.82