Insiders who reported open-market trades in the last 12 months at the companies John F. Sheridan 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.
Mark David Novara - $4K in TNDM purchases and sales in the last 12 months
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John F. Sheridan is a corporate insider, tracked as PRESIDENT & CEO, Director of TANDEM DIABETES CARE INC (TNDM). InsiderAlpha holds 8 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 F. Sheridan submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has John F. Sheridan been buying or selling stock?
Recorded transactions: 1 open-market purchase ($102K) and 0 open-market sales across all tracked filings.
John F. Sheridan is PRESIDENT & CEO, Director of TANDEM DIABETES CARE INC (TNDM). 8 SEC Form 4 filings on record going back to 2024, most recently on 18 August 2026. Lifetime open-market purchases: $102K.
Recent transactions
20
The latest 20 SEC Form 4 transactions reported by John F. Sheridan.
InsiderAlpha's records for John F. Sheridan go back to 2024: 8 primary Form 4 filings, an average of 2.7 per year. The typical open-market purchase is $102K (1 buy totaling $102K). The largest single buy on record is $102K of TNDM in 2025. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
