INTERDIGITAL INC

Ticker: IDCC CUSIP: 45867G101 Class: EQTY

ALLIANCEBERNSTEIN L.P.'s Holding History (CIK: 0001109448)

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

Q4 2025

Shares 37,034 Value ($000) $11,791 Avg Close $353.55 Range $314.37 - $412.60

Q3 2025

Shares 36,778 Value ($000) $12,697 Avg Close $271.66 Range $213.06 - $360.30

Q2 2025

Shares 32,970 Value ($000) $7,393 Avg Close $211.87 Range $180.60 - $237.50

Q1 2025

Shares 32,585 Value ($000) $6,737 Avg Close $201.31 Range $169.58 - $231.97

Q4 2024

Shares 31,294 Value ($000) $6,062 Avg Close $174.85 Range $140.47 - $203.90

Q3 2024

Shares 32,171 Value ($000) $4,556 Avg Close $131.08 Range $115.10 - $143.96

Q2 2024

Shares 33,591 Value ($000) $3,915 Avg Close $106.87 Range $95.33 - $119.10

Q1 2024

Shares 31,226 Value ($000) $3,324 Avg Close $105.70 Range $100.55 - $119.86

Q4 2023

Shares 34,799 Value ($000) $3,777 Avg Close $92.54 Range $74.65 - $111.79

Q3 2023

Shares 36,207 Value ($000) $2,905 Avg Close $86.92 Range $79.20 - $98.69

Q2 2023

Shares 36,234 Value ($000) $3,498 Avg Close $80.98 Range $66.82 - $97.62

Q1 2023

Shares 41,534 Value ($000) $3,028 Avg Close $69.61 Range $52.13 - $75.74

Q4 2022

Shares 47,954 Value ($000) $2,373 Avg Close $48.77 Range $43.87 - $51.48

Q3 2022

Shares 47,976 Value ($000) $1,939 Avg Close $53.92 Range $40.23 - $64.00

Q2 2022

Shares 48,135 Value ($000) $2,927 Avg Close $61.35 Range $56.13 - $67.14

Q1 2022

Shares 47,151 Value ($000) $3,008 Avg Close $66.45 Range $61.36 - $73.97

Q4 2021

Shares 51,992 Value ($000) $3,724 Avg Close $69.71 Range $65.79 - $74.27

Q3 2021

Shares 51,943 Value ($000) $3,523 Avg Close $69.30 Range $63.34 - $75.25

Q2 2021

Shares 53,803 Value ($000) $3,929 Avg Close $73.91 Range $63.74 - $85.75

Q1 2021

Shares 78,752 Value ($000) $4,997 Avg Close $65.36 Range $59.93 - $69.02

Q4 2020

Shares 78,312 Value ($000) $4,752 Avg Close $59.88 Range $54.37 - $63.74

Q3 2020

Shares 79,152 Value ($000) $4,516 Avg Close $60.07 Range $54.62 - $67.06

Q2 2020

Shares 81,072 Value ($000) $4,591 Avg Close $53.16 Range $41.61 - $62.66

Q1 2020

Shares 83,862 Value ($000) $3,743 Avg Close $52.66 Range $31.04 - $64.22

Q4 2019

Shares 84,042 Value ($000) $4,579 Avg Close $55.25 Range $49.84 - $60.33

Q3 2019

Shares 127,503 Value ($000) $6,690 Avg Close $56.51 Range $47.02 - $66.95

Q2 2019

Shares 129,198 Value ($000) $8,320 Avg Close $66.69 Range $62.43 - $72.66

Q1 2019

Shares 139,928 Value ($000) $9,232 Avg Close $69.51 Range $64.12 - $74.03

Q4 2018

Shares 142,397 Value ($000) $9,459 Avg Close $72.85 Range $62.34 - $80.75

Q3 2018

Shares 102,042 Value ($000) $8,163 Avg Close $81.96 Range $78.65 - $85.85

Q2 2018

Shares 100,337 Value ($000) $8,117 Avg Close $79.55 Range $71.75 - $85.50

Q1 2018

Shares 84,135 Value ($000) $6,192 Avg Close $76.57 Range $69.33 - $81.70

Q4 2017

Shares 68,927 Value ($000) $5,249 Avg Close $74.74 Range $70.60 - $78.10

Q3 2017

Shares 92,887 Value ($000) $6,850 Avg Close $73.19 Range $67.55 - $81.85

Q2 2017

Shares 80,477 Value ($000) $6,221 Avg Close $83.80 Range $77.20 - $93.00

Q1 2017

Shares 123,197 Value ($000) $10,632 Avg Close $89.86 Range $83.15 - $102.30

Q4 2016

Shares 112,507 Value ($000) $10,278 Avg Close $80.20 Range $68.10 - $98.00

Q3 2016

Shares 103,297 Value ($000) $8,181 Avg Close $66.77 Range $52.33 - $79.92

Q2 2016

Shares 77,637 Value ($000) $4,323 Avg Close $56.52 Range $51.97 - $59.83

Q1 2016

Shares 68,377 Value ($000) $3,805 Avg Close $48.28 Range $41.01 - $55.85

Q4 2015

Shares 62,867 Value ($000) $3,083 Avg Close $50.76 Range $46.78 - $54.95

Q3 2015

Shares 63,401 Value ($000) $3,208 Avg Close $51.62 Range $44.28 - $57.77

Q2 2015

Shares 67,297 Value ($000) $3,829 Avg Close $55.81 Range $49.57 - $60.69

Q1 2015

Shares 73,177 Value ($000) $3,713 Avg Close $51.89 Range $47.76 - $56.27

Q4 2014

Shares 80,317 Value ($000) $4,249 Avg Close $48.18 Range $38.64 - $54.90

Q3 2014

Shares 82,217 Value ($000) $3,274 Avg Close $44.00 Range $39.40 - $48.93

Q2 2014

Shares 89,497 Value ($000) $4,278 Avg Close $38.65 Range $31.45 - $49.10

Q1 2014

Shares 98,457 Value ($000) $3,260 Avg Close $29.77 Range $26.25 - $33.60

Q4 2013

Shares 100,109 Value ($000) $2,952 Avg Close $33.88 Range $28.53 - $39.87

Q3 2013

Shares 99,682 Value ($000) $3,721 Avg Close $37.73 Range $35.02 - $41.24

Q2 2013

Shares 101,125 Value ($000) $4,515 Avg Close $44.80 Range $38.60 - $48.60

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	37,034	$11,791	$353.55	$314.37 - $412.60
Q3 2025	36,778	$12,697	$271.66	$213.06 - $360.30
Q2 2025	32,970	$7,393	$211.87	$180.60 - $237.50
Q1 2025	32,585	$6,737	$201.31	$169.58 - $231.97
Q4 2024	31,294	$6,062	$174.85	$140.47 - $203.90
Q3 2024	32,171	$4,556	$131.08	$115.10 - $143.96
Q2 2024	33,591	$3,915	$106.87	$95.33 - $119.10
Q1 2024	31,226	$3,324	$105.70	$100.55 - $119.86
Q4 2023	34,799	$3,777	$92.54	$74.65 - $111.79
Q3 2023	36,207	$2,905	$86.92	$79.20 - $98.69
Q2 2023	36,234	$3,498	$80.98	$66.82 - $97.62
Q1 2023	41,534	$3,028	$69.61	$52.13 - $75.74
Q4 2022	47,954	$2,373	$48.77	$43.87 - $51.48
Q3 2022	47,976	$1,939	$53.92	$40.23 - $64.00
Q2 2022	48,135	$2,927	$61.35	$56.13 - $67.14
Q1 2022	47,151	$3,008	$66.45	$61.36 - $73.97
Q4 2021	51,992	$3,724	$69.71	$65.79 - $74.27
Q3 2021	51,943	$3,523	$69.30	$63.34 - $75.25
Q2 2021	53,803	$3,929	$73.91	$63.74 - $85.75
Q1 2021	78,752	$4,997	$65.36	$59.93 - $69.02
Q4 2020	78,312	$4,752	$59.88	$54.37 - $63.74
Q3 2020	79,152	$4,516	$60.07	$54.62 - $67.06
Q2 2020	81,072	$4,591	$53.16	$41.61 - $62.66
Q1 2020	83,862	$3,743	$52.66	$31.04 - $64.22
Q4 2019	84,042	$4,579	$55.25	$49.84 - $60.33
Q3 2019	127,503	$6,690	$56.51	$47.02 - $66.95
Q2 2019	129,198	$8,320	$66.69	$62.43 - $72.66
Q1 2019	139,928	$9,232	$69.51	$64.12 - $74.03
Q4 2018	142,397	$9,459	$72.85	$62.34 - $80.75
Q3 2018	102,042	$8,163	$81.96	$78.65 - $85.85
Q2 2018	100,337	$8,117	$79.55	$71.75 - $85.50
Q1 2018	84,135	$6,192	$76.57	$69.33 - $81.70
Q4 2017	68,927	$5,249	$74.74	$70.60 - $78.10
Q3 2017	92,887	$6,850	$73.19	$67.55 - $81.85
Q2 2017	80,477	$6,221	$83.80	$77.20 - $93.00
Q1 2017	123,197	$10,632	$89.86	$83.15 - $102.30
Q4 2016	112,507	$10,278	$80.20	$68.10 - $98.00
Q3 2016	103,297	$8,181	$66.77	$52.33 - $79.92
Q2 2016	77,637	$4,323	$56.52	$51.97 - $59.83
Q1 2016	68,377	$3,805	$48.28	$41.01 - $55.85
Q4 2015	62,867	$3,083	$50.76	$46.78 - $54.95
Q3 2015	63,401	$3,208	$51.62	$44.28 - $57.77
Q2 2015	67,297	$3,829	$55.81	$49.57 - $60.69
Q1 2015	73,177	$3,713	$51.89	$47.76 - $56.27
Q4 2014	80,317	$4,249	$48.18	$38.64 - $54.90
Q3 2014	82,217	$3,274	$44.00	$39.40 - $48.93
Q2 2014	89,497	$4,278	$38.65	$31.45 - $49.10
Q1 2014	98,457	$3,260	$29.77	$26.25 - $33.60
Q4 2013	100,109	$2,952	$33.88	$28.53 - $39.87
Q3 2013	99,682	$3,721	$37.73	$35.02 - $41.24
Q2 2013	101,125	$4,515	$44.80	$38.60 - $48.60