Leslie T. Thornton - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 4, 2026
Leslie T. Thornton has filed 1 SEC Form 4 filing across 1 company in the last 90 days - selling. Lifetime open-market sales: $1.39M.
Profile
Leslie T. Thornton is a corporate insider at PERDOCEO EDUCATION Corp (PRDO). Thornton's filing history also covers Southwest Gas Holdings, Inc. (SWX). Thornton has reported 5 insider filings with the SEC since 2025. The most recent filing was in May 2026.
| Role | Insider |
|---|---|
| Notability | 26/100 |
Board memberships
- PERDOCEO EDUCATION Corp
- Southwest Gas Holdings, Inc.
Reported roles
- Director
Trading Pattern
InsiderAlpha's records for Leslie T. Thornton go back to 2025: 5 primary Form 4 filings, an average of 2.5 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.
Career & Filing History
Every role Leslie T. Thornton 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 PERDOCEO EDUCATION Corp (PRDO) - 4 filings, 2025 to 2026
- Director at Southwest Gas Holdings, Inc. (SWX) - 1 filing, 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-26 | PRDO | PERDOCEO EDUCATION Corp | A - Grant or award | 4.0K | $0.00 | |
| 2026-03-13 | PRDO | PERDOCEO EDUCATION Corp | S - Open-market sale | 21.1K | $35.37 | $747K |
| 2026-03-13 | PRDO | PERDOCEO EDUCATION Corp | M - Option exercise | 21.1K | $5.96 | $126K |
| 2026-02-24 | SWX | Southwest Gas Holdings, Inc. | A - Grant or award | 1.7K | $0.00 | |
| 2025-05-22 | PRDO | PERDOCEO EDUCATION Corp | A - Grant or award | 5.2K | $0.00 | |
| 2025-05-07 | PRDO | PERDOCEO EDUCATION Corp | S - Open-market sale | 20.9K | $30.76 | $642K |
Companies - Last 90 Days
- PERDOCEO EDUCATION Corp (PRDO) - 1 filing, last 2026-05-26
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Leslie T. Thornton 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.
- Todd S. Nelson - $12.52M of PRDO open-market activity in the last 12 months
- Ashish R. Ghia - $3.21M of PRDO open-market activity in the last 12 months
- Greg E. Jansen - $2.14M of PRDO open-market activity in the last 12 months
- David C. Czeszewski - $1.19M of PRDO open-market activity in the last 12 months
- Elise Baskel - $742K of PRDO open-market activity in the last 12 months
- Gregory L. Jackson - $703K of PRDO open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Sam Levinson
- Paul S. Levy
- Liberty 77 Capital L.P.
- LIBERTY MUTUAL HOLDING CO
- Alfred Lin
- Lincoln Financial Investments Corp
- LINCOLN NATIONAL LIFE INSURANCE CO /IN/
- Adam C. Lipson
Frequently Asked Questions
Who is Leslie T. Thornton?
Leslie T. Thornton is a corporate insider at PERDOCEO EDUCATION Corp (PRDO). Thornton's filing history also covers Southwest Gas Holdings, Inc. (SWX). Thornton has reported 5 insider filings with the SEC since 2025. The most recent filing was in May 2026.…
How many SEC Form 4 filings has Leslie T. Thornton submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Leslie T. Thornton been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($1.39M) across all tracked filings.
Where can I see all of Leslie T. Thornton'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 Leslie T. Thornton profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.