CORNING INC

Ticker: GLW CUSIP: 219350105 Class: COM

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

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

Q4 2025

Shares 15,983 Value ($000) $1,399 Avg Close $85.98 Range $77.39 - $96.64

Q3 2025

Shares 3,300 Value ($000) $271 Avg Close $64.97 Range $50.94 - $81.93

Q4 2019

Shares 300 Value ($000) $8 Avg Close $24.43 Range $22.45 - $26.10

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	15,983	$1,399	$85.98	$77.39 - $96.64
Q3 2025	3,300	$271	$64.97	$50.94 - $81.93
Q4 2019	300	$8	$24.43	$22.45 - $26.10