Summary
Updated Aug 31, 2026
Karen S. Thomas is EVP, Worldwide Sales and Mkt of A10 Networks, Inc. (ATEN). 2 SEC Form 4 filings on record, most recently on 30 December 2024. Most recent open-market trade: sold $103K of ATEN on 13 November 2024. Lifetime open-market sales: $103K.
Recent Transactions
3Every recent SEC Form 4 transaction Karen S. Thomas has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Karen S. Thomas go back to 2024: 2 primary Form 4 filings, an average of 0.7 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Karen S. Thomas 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.
- Dhrupad Trivedi - $2.06M of ATEN open-market activity in the last 12 months
- Eric Singer - $672K of ATEN open-market activity in the last 12 months
- Robert Scott Weber - $392K of ATEN open-market activity in the last 12 months
- Dana Elizabeth Wolf - $68K of ATEN 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 Karen S. Thomas?
Karen S. Thomas is a corporate insider, tracked as EVP, Worldwide Sales and Mkt of A10 Networks, Inc. (ATEN). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Karen S. Thomas last file a Form 4?
The most recent primary Form 4 on record is dated 30 December 2024, one of 2 filings going back to 2024.
Has Karen S. Thomas been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($103K) across all tracked filings.
Where can I see all of Karen S. Thomas'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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