John C. Klock Jr. - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
John C. Klock Jr. is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days.
Profile
John C. Klock Jr. serves as Director of QT IMAGING HOLDINGS, INC. (QTI). Klock has reported 2 insider filings with the SEC since 2025. The most recent filing was in March 2026.
| Role | Director, 10% Owner |
|---|---|
| Notability | 36/100 |
Board memberships
- QT IMAGING HOLDINGS, INC.
Reported roles
- Director
Trading Pattern
InsiderAlpha's records for John C. Klock Jr. go back to 2025: 2 primary Form 4 filings, 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 John C. Klock Jr. 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, 10% Owner at QT IMAGING HOLDINGS, INC. (QTI) - 2 filings, 2025 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-03-25 | QTI | QT IMAGING HOLDINGS, INC. | A - Grant or award | 3.5K | $0.00 |
Most Active Insiders Right Now
John C. Klock Jr. 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:
- Marc Johnson
- James Jones
- Andrew T. Kaplan
- A. J. Kazimi
- Michael John Kazley
- Kennedy Lewis Investment Holdings II LLC
- KENNEDY LEWIS MANAGEMENT LP
- James M. Kilts
Frequently Asked Questions
Who is John C. Klock Jr.?
John C. Klock Jr. serves as Director of QT IMAGING HOLDINGS, INC. (QTI). Klock has reported 2 insider filings with the SEC since 2025. The most recent filing was in March 2026.…
Where can I see all of John C. Klock Jr.'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 John C. Klock Jr. profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.