Summary
Updated Aug 31, 2026
Heather A. Planishek files SEC Form 4 reports at Palantir Technologies Inc. (PLTR). 4 SEC Form 4 filings on record, most recently on 6 December 2024. Most recent open-market trade: sold $8K of PLTR on 6 December 2024. Lifetime open-market sales: $4.67M.
Recent Transactions
17Every recent SEC Form 4 transaction Heather A. Planishek has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Heather A. Planishek go back to 2024: 4 primary Form 4 filings, an average of 1.3 per year. 20 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 Heather A. Planishek 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.
- Peter Thiel - $289.71M of PLTR open-market activity in the last 12 months
- Alexander C. Karp - $272.17M of PLTR open-market activity in the last 12 months
- Stephen Andrew Cohen - $143.99M of PLTR open-market activity in the last 12 months
- Shyam Sankar - $102.03M of PLTR open-market activity in the last 12 months
- Alexander D. Moore - $31.12M of PLTR open-market activity in the last 12 months
- David A. Glazer - $21.71M of PLTR 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 Heather A. Planishek?
Heather A. Planishek is a corporate insider of Palantir Technologies Inc. (PLTR). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Heather A. Planishek last file a Form 4?
The most recent primary Form 4 on record is dated 6 December 2024, one of 4 filings going back to 2024.
Has Heather A. Planishek been buying or selling stock?
Recorded transactions: 0 open-market purchases and 14 open-market sales ($4.67M) across all tracked filings.
Where can I see all of Heather A. Planishek'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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