INTERDIGITAL INC

Ticker: IDCC CUSIP: 45867G101 Class: EQTY

SUMMIT SECURITIES GROUP LLC's Holding History (CIK: 0001531593)

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

Q3 2025

Shares 209 Value ($000) $72 Avg Close $271.66 Range $213.06 - $360.30

Q1 2025

Shares 52 Value ($000) $11 Avg Close $201.31 Range $169.58 - $231.97

Q2 2021

Shares 3,850 Value ($000) $281 Avg Close $73.91 Range $63.74 - $85.75

Q2 2016

Shares 3,610 Value ($000) $201 Avg Close $56.52 Range $51.97 - $59.83

Q4 2014

Shares 2,600 Value ($000) $138 Avg Close $48.18 Range $38.64 - $54.90

Q3 2014

Shares 2,500 Value ($000) $100 Avg Close $44.00 Range $39.40 - $48.93

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	209	$72	$271.66	$213.06 - $360.30
Q1 2025	52	$11	$201.31	$169.58 - $231.97
Q2 2021	3,850	$281	$73.91	$63.74 - $85.75
Q2 2016	3,610	$201	$56.52	$51.97 - $59.83
Q4 2014	2,600	$138	$48.18	$38.64 - $54.90
Q3 2014	2,500	$100	$44.00	$39.40 - $48.93