Summary
Updated Aug 31, 2026
John D. Markley Jr. is Director of InterDigital, Inc. (IDCC). 9 SEC Form 4 filings on record going back to 2024, most recently on 24 July 2026. Most recent open-market trade: sold $120K of IDCC on 23 June 2026. Lifetime open-market sales: $382K.
Recent Transactions
10Every recent SEC Form 4 transaction John D. Markley Jr. has reported, most recent first.
Trading Pattern
InsiderAlpha's records for John D. Markley Jr. go back to 2024: 9 primary Form 4 filings, an average of 3.0 per year. 2 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies John D. Markley Jr. files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Rajesh Pankaj - $3.92M of IDCC open-market activity in the last 12 months
- Lawrence Liren Chen - $3.83M of IDCC open-market activity in the last 12 months
- Richard Brezski - $2.87M of IDCC open-market activity in the last 12 months
- Joshua D. Schmidt - $2.44M of IDCC open-market activity in the last 12 months
- John A. Kritzmacher - $985K of IDCC open-market activity in the last 12 months
- Julia C. Mattis - $412K of IDCC open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is John D. Markley Jr.?
John D. Markley Jr. is a corporate insider, tracked as Director of InterDigital, Inc. (IDCC). InsiderAlpha holds 9 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has John D. Markley Jr. submitted recently?
3 primary Form 4 filings in the last 90 days, covering 1 company.
Has John D. Markley Jr. been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($382K) across all tracked filings.
Where can I see all of John D. Markley Jr.'s SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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