Insiders who reported open-market trades in the last 12 months at the companies Shigeyuki Hamamatsu 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.
Eric B. Stang - $3.21M in OOMA purchases and sales in the last 12 months
Jenny C. Yeh - $1.03M in OOMA purchases and sales in the last 12 months
Russell Mann - $367K in OOMA purchases and sales in the last 12 months
Susan Butenhoff - $198K in OOMA purchases and sales in the last 12 months
Namrata Sabharwal - $91K in OOMA purchases and sales in the last 12 months
William D. Pearce - $54K in OOMA purchases and sales in the last 12 months
More insiders (A-Z)
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Shigeyuki Hamamatsu is a corporate insider, tracked as SVP & Chief Financial Officer of OOMA INC (OOMA). InsiderAlpha holds 23 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 Shigeyuki Hamamatsu submitted recently?
4 primary Form 4 filings in the last 90 days, covering 1 company.
Has Shigeyuki Hamamatsu been buying or selling stock?
Recorded transactions: 0 open-market purchases and 5 open-market sales ($1.39M) across all tracked filings.
Shigeyuki Hamamatsu is SVP & Chief Financial Officer of OOMA INC (OOMA). 23 SEC Form 4 filings on record going back to 2024, most recently on 17 September 2026. Most recent open-market trade: sold $107K of OOMA on 3 September 2026. Lifetime open-market sales: $1.39M.
Recent transactions
20
The latest 20 SEC Form 4 transactions reported by Shigeyuki Hamamatsu.
InsiderAlpha's records for Shigeyuki Hamamatsu go back to 2024: 23 primary Form 4 filings, an average of 7.7 per year. 2 recorded transactions carry a Rule 10b5-1 plan flag. This identifies the marked transactions as reported under a trading plan; it does not establish the plan status of unmarked transactions.
