James Costos - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
James Costos has filed 2 SEC Form 4 filings across 1 company in the last 90 days - selling. Lifetime open-market sales: $242K.
Profile
James Costos is a corporate insider at PJT Partners Inc. (PJT). Costos has reported 8 insider filings with the SEC since 2024. The most recent filing was in June 2026.
| Role | Insider |
|---|---|
| Notability | 20/100 |
Board memberships
- PJT Partners Inc.
Trading Pattern
InsiderAlpha's records for James Costos go back to 2024: 7 primary Form 4 filings, an average of 2.3 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.
Career & Filing History
Every role James Costos has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Insider at PJT Partners Inc. (PJT) - 7 filings, 2024 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-03 | PJT | PJT Partners Inc. | M - Option exercise | 1.9K | - | |
| 2024-11-08 | PJT | PJT Partners Inc. | S - Open-market sale | 1.5K | $161.41 | $242K |
Companies - Last 90 Days
- PJT Partners Inc. (PJT) - 2 filings, last 2026-06-18
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies James Costos has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Helen T. Meates - $1.23M of PJT open-market activity in the last 12 months
- Grace Reksten Skaugen - $481K of PJT open-market activity in the last 12 months
- David Adam Travin - $457K of PJT open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- JANA Partners Management, LP
- Arun Jeldi
- Jan Philipp Jenisch
- Marc Johnson
- James Jones
- Andrew T. Kaplan
- A. J. Kazimi
- Michael John Kazley
Frequently Asked Questions
Who is James Costos?
James Costos is a corporate insider at PJT Partners Inc. (PJT). Costos has reported 8 insider filings with the SEC since 2024. The most recent filing was in June 2026.…
How many SEC Form 4 filings has James Costos submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has James Costos been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($242K) across all tracked filings.
Where can I see all of James Costos'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.
Learn More
Open the live James Costos profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.