Summary
Updated Aug 31, 2026
Jennifer Koester is President & COO, Sphere of Sphere Entertainment Co. (SPHR). 3 SEC Form 4 filings on record going back to 2025, most recently on 17 March 2026.
Recent Transactions
6Every recent SEC Form 4 transaction Jennifer Koester has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Jennifer Koester go back to 2025: 3 primary Form 4 filings, an average of 1.5 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 Sector
No other insider has filed at Jennifer Koester's companies, so these are insiders reporting open-market trades at other companies in the same sector.
- Richard Craig Smith - $33.03M of AZO open-market activity in the last 12 months
- Lei Wu - $32.70M of GCT open-market activity in the last 12 months
- Douglas J. Herrington - $32.31M of AMZN open-market activity in the last 12 months
- Fund 1 Investments, LLC - $32.30M of FLWS open-market activity in the last 12 months
- Scott H. Baxter - $30.76M of KTB open-market activity in the last 12 months
- Kevin Hochman - $29.96M of EAT 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 Jennifer Koester?
Jennifer Koester is a corporate insider, tracked as President & COO, Sphere of Sphere Entertainment Co. (SPHR). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Jennifer Koester last file a Form 4?
The most recent primary Form 4 on record is dated 17 March 2026, one of 3 filings going back to 2025.
Where can I see all of Jennifer Koester'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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