Jack Leibler - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Jack Leibler is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days. Lifetime open-market sales: $154K.
Profile
Jack Leibler serves as Director of NEXTNRG, INC. (NXXT). Leibler has reported 1 insider filing with the SEC since 2026. The most recent filing was in January 2026.
| Role | Director |
|---|---|
| Notability | 26/100 |
Board memberships
- NEXTNRG, INC.
Reported roles
- Director
Awards & honors
- Directorship at NextNRG, Inc. (NXXT)
- Governance oversight as a member of the board
Trading Pattern
InsiderAlpha's records for Jack Leibler go back to 2026: 1 primary Form 4 filing, an average of 1.0 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 Jack Leibler 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 NEXTNRG, INC. (NXXT) - 1 filing, 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-01-12 | NXXT | NEXTNRG, INC. | S - Open-market sale | 150.0K | $1.03 | $154K |
Most Active Insiders Right Now
Jack Leibler 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:
- Mitchell Jacobson
- JANA Partners Management, LP
- Arun Jeldi
- Jan Philipp Jenisch
- Marc Johnson
- James Jones
- Andrew T. Kaplan
- A. J. Kazimi
Frequently Asked Questions
Who is Jack Leibler?
Jack Leibler serves as Director of NEXTNRG, INC. (NXXT). Leibler has reported 1 insider filing with the SEC since 2026. The most recent filing was in January 2026.…
Has Jack Leibler been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($154K) across all tracked filings.
Where can I see all of Jack Leibler'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 Jack Leibler profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.