Kathryn McCarthy - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Kathryn McCarthy is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days. Lifetime open-market sales: $1.77M.
Profile
Kathryn McCarthy serves as Director of SEI INVESTMENTS CO (SEIC). McCarthy has reported 4 insider filings with the SEC since 2024. The most recent filing was in May 2026.
| Role | Director |
|---|---|
| Notability | 26/100 |
Board memberships
- SEI INVESTMENTS CO
Reported roles
- Director
Trading Pattern
InsiderAlpha's records for Kathryn McCarthy go back to 2024: 4 primary Form 4 filings, an average of 1.3 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 Kathryn McCarthy 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.
- Director at SEI INVESTMENTS CO (SEIC) - 4 filings, 2024 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-05 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 10.0K | $91.07 | $911K |
| 2026-05-05 | SEIC | SEI INVESTMENTS CO | M - Option exercise | 5.0K | $49.63 | $248K |
| 2026-05-05 | SEIC | SEI INVESTMENTS CO | M - Option exercise | 5.0K | $49.63 | $248K |
| 2025-12-16 | SEIC | SEI INVESTMENTS CO | A - Grant or award | 2.3K | - | |
| 2025-09-29 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 10.0K | $85.66 | $857K |
| 2025-09-29 | SEIC | SEI INVESTMENTS CO | M - Option exercise | 10.0K | $53.34 | $533K |
| 2024-12-16 | SEIC | SEI INVESTMENTS CO | A - Grant or award | 2.2K | - |
Most Active Insiders Right Now
Kathryn McCarthy has no recent co-filers at the same companies, so here are the insiders with the largest open-market activity across the market in the last 90 days.
- MetLife Investment Management, LLC - $1600000.00B of FINS open-market activity in the last 90 days
- Magnetar Financial LLC - $16357.48B of CRWV open-market activity in the last 90 days
- Marianne Okland - $18.46B of STNG open-market activity in the last 90 days
- VisionWave Holdings, Inc. - $14.13B of SVRE open-market activity in the last 90 days
- Vanessa Allen Sutherland - $7.44B of PSX open-market activity in the last 90 days
- AI Alpine (Luxembourg) S.a.r.l. - $2.69B of INIO open-market activity in the last 90 days
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- A. J. Kazimi
- Michael John Kazley
- Kennedy Lewis Investment Holdings II LLC
- KENNEDY LEWIS MANAGEMENT LP
- James M. Kilts
- Richard D. Kinder
- Steven B. Klinsky
- Adam Koppel
Frequently Asked Questions
Who is Kathryn McCarthy?
Kathryn McCarthy serves as Director of SEI INVESTMENTS CO (SEIC). McCarthy has reported 4 insider filings with the SEC since 2024. The most recent filing was in May 2026.…
Has Kathryn McCarthy been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($1.77M) across all tracked filings.
Where can I see all of Kathryn McCarthy'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 Kathryn McCarthy profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.