Insiders who reported open-market trades in the last 12 months at the companies Geoffrey G. Ribar 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.
Susan Ocampo - $305.46M in MTSI purchases and sales in the last 12 months
Dipender Saluja - $36.94M in QS purchases and sales in the last 12 months
Peter Y. Chung - $16.36M in MTSI purchases and sales in the last 12 months
Fritz Prinz - $15.49M in QS purchases and sales in the last 12 months
Timothy Holme - $13.18M in QS purchases and sales in the last 12 months
Stephen G. Daly - $12.77M in MTSI purchases and sales in the last 12 months
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Geoffrey G. Ribar is a corporate insider of QuantumScape Corp (QS). InsiderAlpha holds 9 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Geoffrey G. Ribar last file a Form 4?
The most recent primary Form 4 on record is dated 5 June 2026, one of 9 filings going back to 2025.
Has Geoffrey G. Ribar been buying or selling stock?
Recorded transactions: 0 open-market purchases and 3 open-market sales ($1.95M) across all tracked filings.
Geoffrey G. Ribar files SEC Form 4 reports at QuantumScape Corp (QS). 9 SEC Form 4 filings on record going back to 2025, most recently on 5 June 2026. Most recent open-market trade: sold $794K of MRAM on 21 May 2026. Lifetime open-market sales: $1.95M.
Recent transactions
10
The latest 10 SEC Form 4 transactions reported by Geoffrey G. Ribar.
InsiderAlpha's records for Geoffrey G. Ribar go back to 2025: 9 primary Form 4 filings, an average of 4.5 per year. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
