Constantin Ionel Stefan
Chief Technology Officer · Amprius Technologies, Inc.
- 2024
- Aug 25, 2026
- 11
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Constantin Ionel Stefan 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.
- Kang Sun - $57.62M in AMPX purchases and sales in the last 12 months
- Wen Hsuan Hsieh - $7.62M in AMPX purchases and sales in the last 12 months
- Steven Chu - $5.86M in AMPX purchases and sales in the last 12 months
- Donald R. Dixon - $2.54M in AMPX purchases and sales in the last 12 months
- Thomas M. Stepien - $1.34M in AMPX purchases and sales in the last 12 months
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Frequently asked questions
Who is Constantin Ionel Stefan?
Constantin Ionel Stefan is a corporate insider, tracked as Chief Technology Officer of Amprius Technologies, Inc. (AMPX). InsiderAlpha holds 11 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 Constantin Ionel Stefan submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Constantin Ionel Stefan been buying or selling stock?
Recorded transactions: 0 open-market purchases and 11 open-market sales ($8.75M) across all tracked filings.
