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| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 03/31/2021 | INTERDIGITAL INC. | IDCC | 0 | -102,948 | 0 | -6,247,000 | |
| 12/31/2020 | INTERDIGITAL INC. | IDCC | 102,948 | -10,173 | 6,247,000 | -208,000 | $60.68 |
| 09/30/2020 | INTERDIGITAL INC. | IDCC | 113,121 | -36,443 | 6,455,000 | -2,015,000 | $57.06 |
| 06/30/2020 | INTERDIGITAL INC. | IDCC | 149,564 | 528 | 8,470,000 | 1,819,000 | $56.63 |
| 03/31/2020 | INTERDIGITAL INC. | IDCC | 149,036 | 149,036 | 6,651,000 | 6,651,000 | $44.63 |
| 12/31/2016 | INTERDIGITAL INC. | IDCC | 0 | -86,747 | 0 | -6,870,000 | |
| 09/30/2016 | INTERDIGITAL INC. | IDCC | 86,747 | 86,747 | 6,870,000 | 6,870,000 | $79.20 |
| 06/30/2016 | INTERDIGITAL INC. | IDCC | 136,747 | -57,288 | 7,614,000 | -3,184,000 | $55.68 |
| 03/31/2016 | INTERDIGITAL INC. | IDCC | 194,035 | 94,035 | 10,798,000 | 5,738,000 | $55.65 |
| 12/31/2015 | INTERDIGITAL INC. | IDCC | 150,000 | 50,000 | 7,356,000 | 2,296,000 | $49.04 |
| 09/30/2015 | INTERDIGITAL INC. | IDCC | 100,000 | 0 | 5,060,000 | -629,000 | $50.60 |
| 06/30/2015 | INTERDIGITAL INC. | IDCC | 100,000 | 0 | 5,689,000 | 615,000 | $56.89 |
| 03/31/2015 | INTERDIGITAL INC. | IDCC | 100,000 | -1,099,688 | 5,074,000 | -58,389,000 | $50.74 |
| 12/31/2014 | INTERDIGITAL INC. | IDCC | 1,199,688 | -16,953 | 63,463,000 | 15,016,000 | $52.90 |
| 09/30/2014 | INTERDIGITAL INC. | IDCC | 1,216,641 | 3,221 | 48,447,000 | -9,554,000 | $39.82 |
| 06/30/2014 | INTERDIGITAL INC. | IDCC | 1,213,420 | 813,420 | 58,001,000 | 44,757,000 | $47.80 |
| 03/31/2014 | INTERDIGITAL INC. | IDCC | 400,000 | 400,000 | 13,244,000 | 13,244,000 | $33.11 |
| 06/30/2013 | INTERDIGITAL INC. | IDCC | 0 | -400,000 | 0 | -16,440,000 | |
| 03/31/2013 | INTERDIGITAL INC. | IDCC | 0 | -400,000 | 0 | -16,440,000 | |
| 12/31/2012 | INTERDIGITAL INC. | IDCC | 400,000 | 0 | 16,440,000 | 1,528,000 | $41.10 |
| 09/30/2012 | INTERDIGITAL INC. | IDCC | 400,000 | 50,000 | 14,912,000 | 4,583,000 | $37.28 |
| 06/30/2012 | INTERDIGITAL INC. | IDCC | 350,000 | 50,000 | 10,329,000 | -129,000 | $29.51 |
| 03/31/2012 | INTERDIGITAL INC. | IDCC | 300,000 | -100,000 | 10,458,000 | -8,174,000 | $34.86 |
| 12/31/2011 | INTERDIGITAL INC. | IDCC | 400,000 | 0 | 17,428,000 | -1,204,000 | $43.57 |
| 09/30/2011 | INTERDIGITAL INC. | IDCC | 400,000 | 0 | 18,632,000 | 2,292,000 | $46.58 |
| 06/30/2011 | INTERDIGITAL INC. | IDCC | 400,000 | -100,000 | 16,340,000 | -7,515,000 | $40.85 |
| 03/31/2011 | INTERDIGITAL INC. | IDCC | 500,000 | -672,045 | 23,855,000 | -24,949,000 | $47.71 |
| 12/31/2010 | INTERDIGITAL INC. | IDCC | 1,172,045 | -1,100,970 | 48,804,000 | -18,500,000 | $41.64 |
| 09/30/2010 | INTERDIGITAL INC. | IDCC | 2,273,015 | -52,550 | 67,304,000 | 9,886,000 | $29.61 |
| 06/30/2010 | INTERDIGITAL INC. | IDCC | 2,325,565 | 41,370 | 57,418,000 | -6,220,000 | $24.69 |
| 03/31/2010 | INTERDIGITAL INC. | IDCC | 2,284,195 | 200 | 63,638,000 | 3,021,000 | $27.86 |
| 12/31/2009 | INTERDIGITAL INC. | IDCC | 2,283,995 | 368,450 | 60,617,000 | 16,253,000 | $26.54 |
| 12/28/2009 | INTERDIGITAL INC. | IDCC | 2,283,995 | 368,450 | 61,096,866 | 16,732,866 | $26.75 |
| 09/30/2009 | INTERDIGITAL INC. | IDCC | 1,915,545 | 91,400 | 44,364,000 | -218,000 | $23.16 |
| 06/30/2009 | INTERDIGITAL INC. | IDCC | 1,824,145 | 351,250 | 44,582,000 | 6,552,000 | $24.44 |
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