John A Kritzmacher insider trades: InterDigital (IDCC) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where John reports to the SEC
and 1 more company
Open-market buys and sales
28 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Jun 12, 2026 | IDCC | ↓ Sell | 365 | $276.64 | $101K | Direct | Jun 16, 2026 (4d) |
| Dec 23, 2025 | IDCC | ↓ Sell | 1,250 | $331.00 | $414K | Direct | Dec 23, 2025 (0d) |
| Dec 9, 2025 | IDCC | ↓ Sell | 1,250 | $357.37 | $447K | Direct | Dec 10, 2025 (1d) |
| Nov 25, 2025 | IDCC | ↓ Sell | 1,250 | $346.62 | $433K | Direct | Nov 26, 2025 (1d) |
| Nov 11, 2025 | IDCC | ↓ Sell | 1,250 | $360.63 | $451K | Direct | Nov 12, 2025 (1d) |
| Jun 9, 2025 | IDCC | ↓ Sell | 519 | $226.65 | $118K | Direct | Jun 11, 2025 (2d) |
| Sep 20, 2024 | IDCC | ↓ Sell | 2,500 | $138.72 | $347K | Direct | Sep 23, 2024 (3d) |
| Jun 11, 2024 | IDCC | ↓ Sell | 769 | $115.28 | $89K | Direct | Jun 12, 2024 (1d) |
| Jun 7, 2023 | IDCC | ↓ Sell | 1,030 | $86.17 | $89K | Direct | Jun 9, 2023 (2d) |
| Oct 11, 2022 | IDCC | ↑ Buy | 49 | $47.32 | $2K | Direct | Jun 21, 2023 (253d) |
| Jun 6, 2022 | IDCC | ↓ Sell | 814 | $66.83 | $54K | Direct | Jun 7, 2022 (1d) |
| Jul 14, 2021 | JWA | ↓ Sell | 15,771 | $58.30 | $919K | Direct | Jul 16, 2021 (2d) |
| Jun 14, 2021 | JWA | ↓ Sell | 15,000 | $57.38 | $861K | Direct | Jun 16, 2021 (2d) |
| Jun 7, 2021 | IDCC | ↓ Sell | 1,086 | $83.24 | $90K | Direct | Jun 9, 2021 (2d) |
| Jul 13, 2020 | IDCC | ↓ Sell | 969 | $56.22 | $54K | Direct | Jul 14, 2020 (1d) |
| Jun 4, 2019 | IDCC | ↓ Sell | 775 | $64.84 | $50K | Direct | Jun 4, 2019 (0d) |
| Jul 17, 2018 | JWA | ↓ Sell | 15,000 | $67.50 | $1.0M | Direct | Jul 18, 2018 (1d) |
| Jul 11, 2018 | JWA | ↓ Sell | 22,209 | $65.10 | $1.4M | Direct | Jul 13, 2018 (2d) |
| Jun 19, 2018 | JWA | ↓ Sell | 12,791 | $66.72 | $853K | Direct | Jun 20, 2018 (1d) |
| Jun 15, 2018 | IDCC | ↓ Sell | 750 | $85.10 | $64K | Direct | Jun 18, 2018 (3d) |
| Jun 9, 2017 | IDCC | ↓ Sell | 1,075 | $84.38 | $91K | Direct | Jun 12, 2017 (3d) |
| Jun 13, 2016 | IDCC | ↓ Sell | 1,100 | $58.52 | $64K | Direct | Jun 14, 2016 (1d) |
| Feb 27, 2015 | IDCC | ↓ Sell | 2,000 | $52.56 | $105K | Direct | Feb 27, 2015 (0d) |
| Oct 31, 2014 | IDCC | ↓ Sell | 2,000 | $49.38 | $99K | Direct | Nov 3, 2014 (3d) |
| Aug 12, 2014 | IDCC | ↓ Sell | 2,000 | $43.24 | $86K | Direct | Aug 13, 2014 (1d) |
| Jul 30, 2013 | IDCC | ↓ Sell | 2,000 | $40.00 | $80K | Direct | Jul 31, 2013 (1d) |
| Apr 30, 2013 | IDCC | ↓ Sell | 2,000 | $43.53 | $87K | Direct | May 1, 2013 (1d) |
| Nov 21, 2006 | LU | ↓ Sell | 65,601 | $2.59 | $170K | Direct | Nov 22, 2006 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other IDCC insiders
Open-market trades in the last 12 months
About John A Kritzmacher's insider trades
John A Kritzmacher is a director at InterDigital (IDCC). Since Nov 21, 2006, John has reported 1 open-market purchase worth $2K and 27 sales worth $8.7M on SEC Form 4. In the last 12 months: 5 sales ($1.8M).
Their filings also include grants and awards (108 filings), shares withheld for taxes (23 filings), shares returned to the company (18 filings), option exercises (14 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every IDCC insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.