InterDigital, Inc.
US ˙ NasdaqGS ˙ US45867G1013

SecurityIDCC / InterDigital, Inc.
InstitutionStifel Financial Corp
Latest Disclosed Ownership17,016 shares
Latest Disclosed Value $ 5,139,566
Stifel Financial Corp reports 7.49% increase in ownership of IDCC / InterDigital, Inc.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 17,016 shares of InterDigital, Inc. (US:IDCC) valued at $5,138,832 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 15,831 shares of InterDigital, Inc.. This represents a change in shares of 7.49% during the quarter. The current value of the position is $4,442,367 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-12 2026-03-31 13F INTERDIGITAL COM 45867G101 17,016 1,185 7.49 5,140 1.96 0.0047
2026-02-13 2025-12-31 13F INTERDIGITAL COM 45867G101 15,831 6,638 72.21 5,041 58.79 0.0045
2025-11-12 2025-09-30 13F INTERDIGITAL COM 45867G101 9,193 1,265 15.96 3,174 78.62 0.0029
2025-08-14 2025-06-30 13F INTERDIGITAL COM 45867G101 7,928 2,690 51.36 1,778 64.08 0.0017
2025-05-14 2025-03-31 13F INTERDIGITAL COM 45867G101 5,238 -1,767 -25.22 1,083 -20.19 0.0012
2025-02-13 2024-12-31 13F INTERDIGITAL COM 45867G101 7,005 5,306 312.30 1,357 465.42 0.0014
2024-11-14 2024-09-30 13F INTERDIGITAL COM 45867G101 1,699 -15,127 -89.90 241 -87.76 0.0003
2024-08-13 2024-06-30 13F INTERDIGITAL COM 45867G101 16,826 -654 -3.74 1,961 5.43 0.0022
2024-05-14 2024-03-31 13F INTERDIGITAL COM 45867G101 17,480 3,083 21.41 1,861 19.08 0.0021
2024-02-12 2023-12-31 13F INTERDIGITAL COM 45867G101 14,397 14,397 1,563 0.0020
2020-05-14 2020-03-31 13F INTERDIGITAL COM 45867G101 0 -60,992 -100.00 0 -100.00
2020-02-13 2019-12-31 13F INTERDIGITAL COM 45867G101 60,992 60,992 3,324 0.0069
2019-11-19 2019-09-30 13F/A-1 INTERDIGITAL COM 45867G101 0 -63,033 -100.00 0 -100.00
2019-08-14 2019-06-30 13F INTERDIGITAL COM 45867G101 63,033 63,033 4,060 0.0105
2019-05-14 2019-03-31 13F INTERDIGITAL COM 45867G101 0 -59,623 -100.00 0 -100.00
2019-02-13 2018-12-31 13F INTERDIGITAL COM 45867G101 59,623 -846 -1.40 3,961 -18.11 0.0128
2018-11-13 2018-09-30 13F INTERDIGITAL COM 45867G101 60,469 3,405 5.97 4,837 4.76 0.0139
2018-08-14 2018-06-30 13F INTERDIGITAL COM 45867G101 57,064 2,941 5.43 4,617 15.92 0.0142
2018-05-11 2018-03-31 13F INTERDIGITAL COM 45867G101 54,123 -175 -0.32 3,983 -3.65 0.0126
2018-02-14 2017-12-31 13F INTERDIGITAL COM 45867G101 54,298 100 0.18 4,134 3.43 0.0131
2017-11-13 2017-09-30 13F INTERDIGITAL COM 45867G101 54,198 1,675 3.19 3,997 -1.55 0.0139
2017-08-14 2017-06-30 13F INTERDIGITAL COM 45867G101 52,523 820 1.59 4,060 -9.01 0.0151
2017-05-10 2017-03-31 13F INTERDIGITAL COM 45867G101 51,703 1,703 3.41 4,462 -2.32 0.0173
2017-02-16 2016-12-31 13F INTERDIGITAL COM 45867G101 50,000 -2,564 -4.88 4,568 9.73 0.0194
2016-11-15 2016-09-30 13F INTERDIGITAL COM 45867G101 52,564 -1,310 -2.43 4,163 38.77 0.0187
2016-08-17 2016-06-30 13F INTERDIGITAL COM 45867G101 53,874 -4,357 -7.48 3,000 -7.38 0.0139
2016-05-16 2016-03-31 13F INTERDIGITAL COM 45867G101 58,231 -4,873 -7.72 3,239 4.69 0.0173
2016-03-21 2015-12-31 13F/A-2 INTERDIGITAL COM 45867G101 63,104 -753 -1.18 3,094 -4.24 0.0161
2016-02-26 2015-12-31 13F/A-1 INTERDIGITAL COM 45867G101 19,021 -44,083 784 4,099.4647
2016-02-16 2015-12-31 13F INTERDIGITAL COM 45867G101 19,021 2,861
2015-11-16 2015-09-30 13F INTERDIGITAL COM 45867G101 63,857 409 0.64 3,231 -10.42 0.0182
2015-08-17 2015-06-30 13F/A-1 INTERDIGITAL COM 45867G101 63,448 3,948 6.64 3,607 19.48 0.0186
2015-08-17 2015-06-30 13F INTERDIGITAL COM 45867G101 63,100 3,589
2015-05-14 2015-03-31 13F INTERDIGITAL COM 45867G101 59,500 5,300 9.78 3,019 5.30 0.0165
2015-02-13 2014-12-31 13F INTERDIGITAL COM 45867G101 54,200 1,882 3.60 2,867 37.64 0.0159
2014-11-13 2014-09-30 13F INTERDIGITAL COM 45867G101 52,318 418 0.81 2,083 -16.04 0.0183
2014-08-14 2014-06-30 13F INTERDIGITAL COM 45867G101 51,900 -1,153 -2.17 2,481 41.21 0.0223
2014-05-15 2014-03-31 13F INTERDIGITAL COM 45867G101 53,053 53,053 1,757 0.0168
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.