QUEST DIAGNOSTICS INC

Ticker: DGX CUSIP: 74834L100 Class: COMMON STOCK

BERKSHIRE ASSET MANAGEMENT LLC/PA's Holding History (CIK: 0000949012)

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

Q3 2025

Shares 2,490 Value ($000) $475 Avg Close $176.64 Range $163.92 - $190.64

Q2 2025

Shares 1,460 Value ($000) $262 Avg Close $172.09 Range $155.80 - $180.75

Q1 2025

Shares 1,460 Value ($000) $257 Avg Close $161.93 Range $146.66 - $176.41

Q4 2024

Shares 1,460 Value ($000) $227 Avg Close $152.61 Range $143.46 - $162.25

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	2,490	$475	$176.64	$163.92 - $190.64
Q2 2025	1,460	$262	$172.09	$155.80 - $180.75
Q1 2025	1,460	$257	$161.93	$146.66 - $176.41
Q4 2024	1,460	$227	$152.61	$143.46 - $162.25