Summary
Updated Aug 31, 2026
John Sakamoto is President and COO of SkyWater Technology, LLC (SKYT). 5 SEC Form 4 filings on record going back to 2024, most recently on 31 July 2026. Most recent open-market trade: sold $108K of SKYT on 2 December 2024. Lifetime open-market sales: $108K.
Recent Transactions
6Every recent SEC Form 4 transaction John Sakamoto has reported, most recent first.
Trading Pattern
InsiderAlpha's records for John Sakamoto go back to 2024: 5 primary Form 4 filings, an average of 1.7 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 John Sakamoto 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.
- Loren A. Unterseher - $14.64M of SKYT open-market activity in the last 12 months
- Steve Manko - $9.77M of SKYT open-market activity in the last 12 months
- Thomas Sonderman - $247K of SKYT 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 Sakamoto?
John Sakamoto is a corporate insider, tracked as President and COO of SkyWater Technology, LLC (SKYT). InsiderAlpha holds 5 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 Sakamoto submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has John Sakamoto been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($108K) across all tracked filings.
Where can I see all of John Sakamoto'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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