Summary
Updated Aug 31, 2026
Mark Frichtl is Chief Technology Officer of Ouster, Inc. (OUST). 15 SEC Form 4 filings on record going back to 2024, most recently on 28 August 2026. Most recent open-market trade: sold $715K of OUST on 16 June 2026. Lifetime open-market purchases: $49K. Lifetime open-market sales: $31.14M.
Recent Transactions
20Every recent SEC Form 4 transaction Mark Frichtl has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Mark Frichtl go back to 2024: 15 primary Form 4 filings, an average of 5.0 per year. The typical open-market purchase is $25K (2 buys totaling $49K). The largest single buy on record is $44K of OUST in 2024. Sales side: 32 recorded sales totaling $31.14M, so the filing history runs sell-heavy by dollar value. 59 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 Mark Frichtl 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.
- Darien Spencer - $4.24M of OUST open-market activity in the last 12 months
- Kenneth P. Gianella - $3.92M of OUST open-market activity in the last 12 months
- Charles Angus Pacala - $3.43M of OUST open-market activity in the last 12 months
- Megan Chung - $1.90M of OUST open-market activity in the last 12 months
- Cyrille Jacquemet - $1.07M of OUST open-market activity in the last 12 months
- Susan Heystee - $616K of OUST 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 Mark Frichtl?
Mark Frichtl is a corporate insider, tracked as Chief Technology Officer of Ouster, Inc. (OUST). InsiderAlpha holds 15 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 Mark Frichtl submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has Mark Frichtl been buying or selling stock?
Recorded transactions: 2 open-market purchases ($49K) and 32 open-market sales ($31.14M) across all tracked filings.
Where can I see all of Mark Frichtl'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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