INTERDIGITAL INC

Ticker: IDCC CUSIP: 45867G101 Class: EQTY

THIRD AVENUE MANAGEMENT LLC's Holding History (CIK: 0001099281)

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

Q3 2014

Shares 648,252 Value ($000) $25,813 Avg Close $44.00 Range $39.40 - $48.93

Q2 2014

Shares 648,252 Value ($000) $30,986 Avg Close $38.65 Range $31.45 - $49.10

Q1 2014

Shares 745,452 Value ($000) $24,682 Avg Close $29.77 Range $26.25 - $33.60

Q4 2013

Shares 781,611 Value ($000) $23,050 Avg Close $33.88 Range $28.53 - $39.87

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2014	648,252	$25,813	$44.00	$39.40 - $48.93
Q2 2014	648,252	$30,986	$38.65	$31.45 - $49.10
Q1 2014	745,452	$24,682	$29.77	$26.25 - $33.60
Q4 2013	781,611	$23,050	$33.88	$28.53 - $39.87