Summary
Updated Aug 31, 2026
Bart Jan Cornelissen is SR. VICE PRESIDENT & CFO of Xencor Inc (XNCR). 3 SEC Form 4 filings on record, most recently on 13 April 2026. Most recent open-market trade: sold $43K of XNCR on 13 April 2026. Lifetime open-market sales: $71K.
Recent Transactions
3Every recent SEC Form 4 transaction Bart Jan Cornelissen has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Bart Jan Cornelissen go back to 2026: 3 primary Form 4 filings, an average of 3.0 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 Bart Jan Cornelissen 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.
- Bassil I. Dahiyat - $320K of XNCR open-market activity in the last 12 months
- John R. Desjarlais - $106K of XNCR open-market activity in the last 12 months
- Kevin Charles Gorman - $93K of XNCR open-market activity in the last 12 months
- Ellen Feigal - $89K of XNCR open-market activity in the last 12 months
- Celia Eckert - $74K of XNCR open-market activity in the last 12 months
- Kurt A. Gustafson - $67K of XNCR 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 Bart Jan Cornelissen?
Bart Jan Cornelissen is a corporate insider, tracked as SR. VICE PRESIDENT & CFO of Xencor Inc (XNCR). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Bart Jan Cornelissen last file a Form 4?
The most recent primary Form 4 on record is dated 13 April 2026, one of 3 filings going back to 2026.
Has Bart Jan Cornelissen been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($71K) across all tracked filings.
Where can I see all of Bart Jan Cornelissen'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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