Jack Mallers - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 4, 2026
Jack Mallers has filed 1 SEC Form 4 filing across 1 company in the last 90 days.
Profile
Jack Mallers serves as Chief Executive Officer of Twenty One Capital, Inc. (XXI). Mallers has reported 4 insider filings with the SEC since 2026. The most recent filing was in July 2026.
| Role | Former Chief Executive Officer and Director, Director |
|---|---|
| Notability | 40/100 |
Board memberships
- Twenty One Capital, Inc.
Reported roles
- Chief Executive Officer
Awards & honors
- Appointed as Director and CEO of Twenty One Capital, Inc. (XXI) as of the 2026-01-06 SEC filing date.
- Oversees governance and regulatory filings for XXI, an entity with no disclosed operating history in public records.
Trading Pattern
InsiderAlpha's records for Jack Mallers go back to 2026: 3 primary Form 4 filings, an average of 3.0 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 Mallers 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 Twenty One Capital, Inc. (XXI) - 1 filing, 2026
- Chief Executive Officer, Director at Twenty One Capital, Inc. (XXI) - 2 filings, 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-21 | XXI | Twenty One Capital, Inc. | D - Derivative transaction | 226.9K | $5.23 | $1.19M |
| 2026-07-21 | XXI | Twenty One Capital, Inc. | D - Derivative transaction | 80.4K | $5.23 | $420K |
| 2026-04-13 | XXI | Twenty One Capital, Inc. | F - Tax withholding / forfeiture | 119.9K | $6.64 | $796K |
| 2026-04-13 | XXI | Twenty One Capital, Inc. | A - Grant or award | 1.61M | $0.00 | |
| 2026-04-13 | XXI | Twenty One Capital, Inc. | F - Tax withholding / forfeiture | 10.4K | $6.64 | $69K |
| 2026-04-13 | XXI | Twenty One Capital, Inc. | A - Grant or award | 35.6K | $6.64 | $236K |
Companies - Last 90 Days
- Twenty One Capital, Inc. (XXI) - 1 filing, last 2026-07-21
Most Active Insiders Right Now
Jack Mallers 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
- Jan Philipp Jenisch
- Marc Johnson
- James Jones
- Andrew T. Kaplan
- A. J. Kazimi
- Michael John Kazley
Frequently Asked Questions
Who is Jack Mallers?
Jack Mallers serves as Chief Executive Officer of Twenty One Capital, Inc. (XXI). Mallers has reported 4 insider filings with the SEC since 2026. The most recent filing was in July 2026.…
How many SEC Form 4 filings has Jack Mallers submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Where can I see all of Jack Mallers'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 Mallers profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.