Tappin Matthew — SEC Form 4 Insider Trading Activity

Summary

Updated Jul 16, 2026

Tappin Matthew has filed 1 SEC Form 4 filing across 1 company in the last 90 days — selling. Lifetime open-market sales: $28K.

Recent Transactions

DateTickerCompanyCodeSharesPriceValue
2026-07-02STEMSTEM, INC.S — Open-market sale996$7.85$8K
2026-07-02STEMSTEM, INC.M — Option exercise2.8K$7.81$21K
2026-07-02STEMSTEM, INC.M — Option exercise5.0K$7.81$39K
2026-03-13STEMSTEM, INC.S — Open-market sale [10b5-1]402$10.83$4K
2026-03-10STEMSTEM, INC.S — Open-market sale655$11.12$7K
2026-03-10STEMSTEM, INC.M — Option exercise1.5K—
2026-03-04STEMSTEM, INC.S — Open-market sale185$10.00$2K
2026-03-04STEMSTEM, INC.S — Open-market sale300$9.67$3K
2026-03-03STEMSTEM, INC.M — Option exercise670—
2026-02-23STEMSTEM, INC.S — Open-market sale366$11.40$4K
2026-02-19STEMSTEM, INC.M — Option exercise1.3K—

Companies — Last 90 Days

Frequently Asked Questions

Who is Tappin Matthew?

Tappin Matthew is a corporate insider — currently tracked as President, Software Products of STEM, INC. (STEM). InsiderAlpha tracks every SEC Form 4 filing in real time.

How many SEC Form 4 filings has Tappin Matthew submitted recently?

1 primary Form 4 filings in the last 90 days, covering 1 company.

Has Tappin Matthew been buying or selling stock?

Recorded transactions: 0 open-market purchases () and 6 open-market sales ($28K) across all tracked filings.

Where can I see all of Tappin Matthew'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.

Learn More

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