Summary
Updated Aug 31, 2026
Stephanie Tilenius is Director of Seagate Technology Holdings plc (STX). 8 SEC Form 4 filings on record going back to 2024, most recently on 6 May 2026. Most recent open-market trade: sold $31K of STX on 6 May 2026. Lifetime open-market sales: $2.10M.
Recent Transactions
7Every recent SEC Form 4 transaction Stephanie Tilenius has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Stephanie Tilenius go back to 2024: 8 primary Form 4 filings, an average of 2.7 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Stephanie Tilenius 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.
- William D. Mosley - $131.11M of STX open-market activity in the last 12 months
- Ban Seng Teh - $39.28M of STX open-market activity in the last 12 months
- Gianluca Romano - $27.23M of STX open-market activity in the last 12 months
- John Christopher Morris - $12.64M of STX open-market activity in the last 12 months
- James Ci Lee - $12.56M of STX open-market activity in the last 12 months
- Kian Fatt Chong - $4.36M of STX 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 Stephanie Tilenius?
Stephanie Tilenius is a corporate insider, tracked as Director of Seagate Technology Holdings plc (STX). InsiderAlpha holds 8 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Stephanie Tilenius last file a Form 4?
The most recent primary Form 4 on record is dated 6 May 2026, one of 8 filings going back to 2024.
Has Stephanie Tilenius been buying or selling stock?
Recorded transactions: 0 open-market purchases and 4 open-market sales ($2.10M) across all tracked filings.
Where can I see all of Stephanie Tilenius'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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