INTERDIGITAL INC

Ticker: IDCC CUSIP: 45867G101 Class: EQTY

Parallax Volatility Advisers, L.P.'s Holding History (CIK: 0001521001)

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

Q4 2018
Shares 18 Value ($000) $1 Avg Close $72.85 Range $62.34 - $80.75
Q3 2018
Shares 923 Value ($000) $74 Avg Close $81.96 Range $78.65 - $85.85
Q2 2018
Shares 655 Value ($000) $53 Avg Close $79.55 Range $71.75 - $85.50
Q1 2018
Shares 558 Value ($000) $41 Avg Close $76.57 Range $69.33 - $81.70
Q4 2017
Shares 6,013 Value ($000) $458 Avg Close $74.74 Range $70.60 - $78.10
Q3 2017
Shares 500 Value ($000) $37 Avg Close $73.19 Range $67.55 - $81.85
Q2 2017
Shares 12,074 Value ($000) $933 Avg Close $83.80 Range $77.20 - $93.00
Q1 2017
Shares 7,435 Value ($000) $642 Avg Close $89.86 Range $83.15 - $102.30
Q4 2016
Shares 5,037 Value ($000) $460 Avg Close $80.20 Range $68.10 - $98.00
Q3 2016
Shares 8,158 Value ($000) $646 Avg Close $66.77 Range $52.33 - $79.92
Q4 2013
Shares 1,005 Value ($000) $30 Avg Close $33.88 Range $28.53 - $39.87