Filings (90d)
0
Purchases
2
Sales
0
Summary
Latest filing:
John S. Koudounis has 3 SEC Form 4 filings on record going back to 2024, most recently on 30 June 2025. Lifetime open-market purchases: $225K.
Recent transactions
Most active insiders across the market
John S. Koudounis has no co-filers on record, so these are insiders with the largest open-market activity across the market in the last 90 days.
- Silver Lake Partners IV, L.P. - $336.06M in DELL purchases and sales in the last 90 days
- SUMITOMO MITSUI FINANCIAL GROUP, INC. - $324.03M in JEF purchases and sales in the last 90 days
- Steven Schuurman - $323.50M in ESTC purchases and sales in the last 90 days
- Martine A. Rothblatt - $302.35M in UTHR purchases and sales in the last 90 days
- Frank Slootman - $295.31M in SNOW purchases and sales in the last 90 days
- SL SPV-2, L.P. - $280.80M in DELL purchases and sales in the last 90 days
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is John S. Koudounis?
John S. Koudounis is a corporate insider. InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did John S. Koudounis last file a Form 4?
The most recent primary Form 4 on record is dated 30 June 2025, one of 3 filings going back to 2024.
Has John S. Koudounis been buying or selling stock?
Recorded transactions: 2 open-market purchases ($225K) and 0 open-market sales across all tracked filings.