InterDigital, Inc.
US ˙ NasdaqGS ˙ US45867G1013

SecurityIDCC / InterDigital, Inc.
InstitutionBoston Trust Walden Corp
Latest Disclosed Ownership78,203 shares
Latest Disclosed Value $ 23,617,306
Boston Trust Walden Corp reports 43.83% decrease in ownership of IDCC / InterDigital, Inc.

On April 24, 2026 - Boston Trust Walden Corp filed a 13F-HR form disclosing ownership of 78,203 shares of InterDigital, Inc. (US:IDCC) valued at $23,617,306 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 139,215 shares of InterDigital, Inc.. This represents a change in shares of -43.83% during the quarter. The current value of the position is $20,070,018 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-24 2026-03-31 13F INTERDIGITAL COMMON STOCK 45867G101 78,203 -61,012 -43.83 23,617 -46.72 0.1161
2026-01-28 2025-12-31 13F INTERDIGITAL COMMON STOCK 45867G101 139,215 -75,930 -35.29 44,323 -40.33 0.3345
2025-10-17 2025-09-30 13F INTERDIGITAL COMMON STOCK 45867G101 215,145 -52,110 -19.50 74,275 23.94 0.5449
2025-07-28 2025-06-30 13F INTERDIGITAL COMMON STOCK 45867G101 267,255 -5,751 -2.11 59,927 6.17 0.4274
2025-04-21 2025-03-31 13F INTERDIGITAL COMMON STOCK 45867G101 273,006 -4,565 -1.64 56,444 4.97 0.4124
2025-01-24 2024-12-31 13F INTERDIGITAL COMMON STOCK 45867G101 277,571 -222,147 -44.45 53,771 -24.03 0.3773
2024-10-24 2024-09-30 13F INTERDIGITAL COMMON STOCK 45867G101 499,718 -134,207 -21.17 70,775 -4.22 0.4924
2024-07-19 2024-06-30 13F INTERDIGITAL COMMON STOCK 45867G101 633,925 -40 -0.01 73,890 9.48 0.5481
2024-04-22 2024-03-31 13F INTERDIGITAL COMMON STOCK 45867G101 633,965 -4,389 -0.69 67,492 -2.59 0.4814
2024-01-24 2023-12-31 13F INTERDIGITAL COMMON STOCK 45867G101 638,354 -28,581 -4.29 69,287 29.47 0.5227
2023-10-18 2023-09-30 13F INTERDIGITAL COMMON STOCK 45867G101 666,935 46,181 7.44 53,515 -10.71 0.4485
2023-07-24 2023-06-30 13F INTERDIGITAL COMMON STOCK 45867G101 620,754 -24,212 -3.75 59,934 27.47 0.4915
2023-04-19 2023-03-31 13F INTERDIGITAL COMMON STOCK 45867G101 644,966 29,953 4.87 47,018 54.51 0.4058
2023-01-20 2022-12-31 13F INTERDIGITAL COMMON STOCK 45867G101 615,013 71,477 13.15 30,431 38.51 0.2676
2022-10-19 2022-09-30 13F INTERDIGITAL COMMON STOCK 45867G101 543,536 136,772 33.62 21,970 -11.16 0.2176
2022-07-22 2022-06-30 13F INTERDIGITAL COMMON STOCK 45867G101 406,764 3,657 0.91 24,731 -3.84 0.2337
2022-04-20 2022-03-31 13F INTERDIGITAL COMMON STOCK 45867G101 403,107 8,801 2.23 25,718 -8.94 0.2124
2022-01-21 2021-12-31 13F INTERDIGITAL COMMON STOCK 45867G101 394,306 -716 -0.18 28,244 5.43 0.2268
2021-10-25 2021-09-30 13F INTERDIGITAL COMMON STOCK 45867G101 395,022 7,933 2.05 26,790 -5.23 0.2372
2021-07-22 2021-06-30 13F INTERDIGITAL COMMON STOCK 45867G101 387,089 -14,182 -3.53 28,269 11.03 0.2513
2021-04-21 2021-03-31 13F INTERDIGITAL COMMON STOCK 45867G101 401,271 -3,313 -0.82 25,460 3.71 0.2465
2021-01-15 2020-12-31 13F INTERDIGITAL COMMON STOCK 45867G101 404,584 126,763 45.63 24,550 54.86 0.2619
2020-10-14 2020-09-30 13F INTERDIGITAL COMMON STOCK 45867G101 277,821 12,257 4.62 15,853 5.41 0.1974
2020-07-23 2020-06-30 13F INTERDIGITAL COMMON STOCK 45867G101 265,564 22,474 9.25 15,039 38.62 0.2031
2020-04-24 2020-03-31 13F/A-1 INTERDIGITAL COMMON STOCK 45867G101 243,090 9,706 4.16 10,849 -14.69 0.1729
2020-04-21 2020-03-31 13F INTERDIGITAL COMMON STOCK 45867G101 291,197 57,813 12,996 115,239.4713
2020-01-10 2019-12-31 13F INTERDIGITAL COMMON STOCK 45867G101 233,384 -11,251 -4.60 12,717 -0.93 0.1480
2019-10-21 2019-09-30 13F INTERDIGITAL COMMON STOCK 45867G101 244,635 73,804 43.20 12,836 16.67 0.1614
2019-07-25 2019-06-30 13F INTERDIGITAL COMMON STOCK 45867G101 170,831 -3,304 -1.90 11,002 -4.25 0.1432
2019-04-16 2019-03-31 13F INTERDIGITAL COMMON STOCK 45867G101 174,135 -42,975 -19.79 11,490 -20.33 0.1564
2019-01-17 2018-12-31 13F INTERDIGITAL COMMON STOCK 45867G101 217,110 -9,428 -4.16 14,422 -20.42 0.2295
2018-10-23 2018-09-30 13F INTERDIGITAL COMMON STOCK 45867G101 226,538 -79,466 -25.97 18,123 -26.79 0.2497
2018-07-25 2018-06-30 13F INTERDIGITAL COMMON STOCK 45867G101 306,004 371 0.12 24,756 10.05 0.3633
2018-04-13 2018-03-31 13F INTERDIGITAL COMMON STOCK 45867G101 305,633 30,670 11.15 22,495 7.44 0.3413
2018-01-29 2017-12-31 13F INTERDIGITAL COMMON STOCK 45867G101 274,963 -7,961 -2.81 20,938 0.35 0.3069
2017-10-13 2017-09-30 13F INTERDIGITAL COMMON STOCK 45867G101 282,924 -2,644 -0.93 20,866 -5.47 0.3249
2017-07-19 2017-06-30 13F INTERDIGITAL COMMON STOCK 45867G101 285,568 -65,048 -18.55 22,074 -27.05 0.3547
2017-04-24 2017-03-31 13F INTERDIGITAL COMMON STOCK 45867G101 350,616 -34,742 -9.02 30,258 -14.04 0.4715
2017-02-07 2016-12-31 13F/A-1 INTERDIGITAL COMMON STOCK 45867G101 385,358 -10,028 -2.54 35,202 12.41 0.5550
2017-02-01 2016-12-31 13F INTERDIGITAL COMMON STOCK 45867G101 385,358 35,202
2016-10-17 2016-09-30 13F INTERDIGITAL COMMON STOCK 45867G101 395,386 -416 -0.11 31,315 42.09 0.5163
2016-08-09 2016-06-30 13F INTERDIGITAL COMMON STOCK 45867G101 395,802 -4,389 -1.10 22,039 -1.04 0.3764
2016-04-19 2016-03-31 13F INTERDIGITAL COMMON STOCK 45867G101 400,191 68,806 20.76 22,270 37.04 0.3877
2016-01-21 2015-12-31 13F INTERDIGITAL COMMON STOCK 45867G101 331,385 -94,578 -22.20 16,251 -24.60 0.3014
2015-10-29 2015-09-30 13F INTERDIGITAL COMMON STOCK 45867G101 425,963 -15,232 -3.45 21,554 -14.13 0.3600
2015-07-17 2015-06-30 13F INTERDIGITAL COMMON STOCK 45867G101 441,195 -7,573 -1.69 25,100 10.23 0.3827
2015-04-15 2015-03-31 13F INTERDIGITAL COMMON STOCK 45867G101 448,768 448,768 0.00 22,771 0.3380
2015-01-28 2014-12-31 13F INTERDIGITAL COMMON STOCK 45867G101 0 -749,867 -100.00 0 -100.00
2014-10-23 2014-09-30 13F INTERDIGITAL COMMON STOCK 45867G101 749,867 -19,182 -2.49 29,860 -18.77 0.4611
2014-08-01 2014-06-30 13F INTERDIGITAL COMMON STOCK 45867G101 769,049 16,459 2.19 36,761 47.52 0.5342
2014-04-11 2014-03-31 13F INTERDIGITAL COMMON STOCK 45867G101 752,590 -8,687 -1.14 24,919 11.00 0.3702
2014-02-11 2013-12-31 13F INTERDIGITAL INC COM COMMON STOCK 45867G101 761,277 158,572 26.31 22,450 -0.24 0.3275
2013-11-15 2013-09-30 13F INTERDIGITAL INC COM COMMON STOCK 45867G101 602,705 -7,828 -1.28 22,505 -17.44 0.3443
2013-08-08 2013-06-30 13F INTERDIGITAL INC COM COMMON STOCK 45867G101 610,533 610,533 27,260 0.4401
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.