Summary
Updated Aug 31, 2026
Karsten Winther is President, EMEA of Vertiv Holdings Co (VRT). 3 SEC Form 4 filings on record going back to 2024, most recently on 25 September 2025. Most recent open-market trade: sold $5.59M of VRT on 14 August 2025. Lifetime open-market sales: $5.59M.
Recent Transactions
7Every recent SEC Form 4 transaction Karsten Winther has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Karsten Winther go back to 2024: 3 primary Form 4 filings, an average of 1.0 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 Karsten Winther 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.
- Roger Fradin - $51.40M of VRT open-market activity in the last 12 months
- Steven Reinemund - $25.39M of VRT open-market activity in the last 12 months
- Edward L. Monser - $18.97M of VRT open-market activity in the last 12 months
- David M. Cote - $10.21M of VRT open-market activity in the last 12 months
- Jan van Dokkum - $9.85M of VRT open-market activity in the last 12 months
- Anders Karlborg - $7.53M of VRT 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 Karsten Winther?
Karsten Winther is a corporate insider, tracked as President, EMEA of Vertiv Holdings Co (VRT). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Karsten Winther last file a Form 4?
The most recent primary Form 4 on record is dated 25 September 2025, one of 3 filings going back to 2024.
Has Karsten Winther been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($5.59M) across all tracked filings.
Where can I see all of Karsten Winther'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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