INTERDIGITAL INC

Ticker: IDCC CUSIP: 45867G101 Class: EQTY

CASTLEARK MANAGEMENT LLC's Holding History (CIK: 0001106832)

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

Q4 2025

Shares 28,936 Value ($000) $9,213 Avg Close $353.55 Range $314.37 - $412.60

Q3 2025

Shares 28,066 Value ($000) $9,689 Avg Close $271.66 Range $213.06 - $360.30

Q2 2025

Shares 32,460 Value ($000) $7,279 Avg Close $211.87 Range $180.60 - $237.50

Q1 2025

Shares 33,420 Value ($000) $6,910 Avg Close $201.31 Range $169.58 - $231.97

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	28,936	$9,213	$353.55	$314.37 - $412.60
Q3 2025	28,066	$9,689	$271.66	$213.06 - $360.30
Q2 2025	32,460	$7,279	$211.87	$180.60 - $237.50
Q1 2025	33,420	$6,910	$201.31	$169.58 - $231.97