INTERDIGITAL INC

Ticker: IDCC CUSIP: 45867G101 Class: EQTY

PRIVATE TRUST CO NA's Holding History (CIK: 0001277557)

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

Q4 2025

Shares 15 Value ($000) $5 Avg Close $353.55 Range $314.37 - $412.60

Q3 2025

Shares 39 Value ($000) $13 Avg Close $271.66 Range $213.06 - $360.30

Q2 2025

Shares 5 Value ($000) $1 Avg Close $211.87 Range $180.60 - $237.50

Q1 2025

Shares 14 Value ($000) $3 Avg Close $201.31 Range $169.58 - $231.97

Q3 2014

Shares 1,000 Value ($000) $40 Avg Close $44.00 Range $39.40 - $48.93

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	15	$5	$353.55	$314.37 - $412.60
Q3 2025	39	$13	$271.66	$213.06 - $360.30
Q2 2025	5	$1	$211.87	$180.60 - $237.50
Q1 2025	14	$3	$201.31	$169.58 - $231.97
Q3 2014	1,000	$40	$44.00	$39.40 - $48.93