Summary
Updated Aug 31, 2026
Stefan Demmerle is Vice President of BORGWARNER INC (BWA). 12 SEC Form 4 filings on record going back to 2024, most recently on 18 August 2026. Most recent open-market trade: sold $70K of BWA on 18 August 2026. Lifetime open-market sales: $6.16M.
Recent Transactions
17Every recent SEC Form 4 transaction Stefan Demmerle has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Stefan Demmerle go back to 2024: 12 primary Form 4 filings, an average of 4.0 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 Stefan Demmerle 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.
- Tonit M. Calaway - $6.89M of BWA open-market activity in the last 12 months
- Joseph F. Fadool - $1.95M of BWA open-market activity in the last 12 months
- Volker Weng - $1.80M of BWA open-market activity in the last 12 months
- Tania Wingfield - $1.45M of BWA open-market activity in the last 12 months
- Isabelle McKenzie - $1.34M of BWA open-market activity in the last 12 months
- Paul Arthur Farrell - $628K of BWA 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 Stefan Demmerle?
Stefan Demmerle is a corporate insider, tracked as Vice President of BORGWARNER INC (BWA). InsiderAlpha holds 12 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 Stefan Demmerle submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Stefan Demmerle been buying or selling stock?
Recorded transactions: 0 open-market purchases and 14 open-market sales ($6.16M) across all tracked filings.
Where can I see all of Stefan Demmerle'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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