Qing Bill Sun - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Qing Bill Sun is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days. Lifetime open-market purchases: $5.40M.
Profile
Qing Bill Sun is the Chief Executive Officer at AA Mission Acquisition Corp. II (YCY). Sun has reported 2 insider filings with the SEC since 2025. The most recent filing was in October 2025.
| Role | Chief Executive Officer, Director, 10% Owner |
|---|---|
| Notability | 50/100 |
Board memberships
- AA Mission Acquisition Corp. II
Reported roles
- Chief Executive Officer
Track Record
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realised performance after each tracked open-market purchase.
| Total purchases tracked | 4 |
|---|
Trading Pattern
InsiderAlpha's records for Qing Bill Sun go back to 2025: 2 primary Form 4 filings, an average of 1.0 per year. The typical open-market purchase is $1.35M (4 buys totaling $5.40M). The largest single buy on record is $3.34M of YCY in 2025. 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 Qing Bill Sun 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.
- Chief Executive Officer, Director, 10% Owner at AA Mission Acquisition Corp. II (YCY) - 2 filings, 2025
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2025-10-14 | YCY | AA Mission Acquisition Corp. II | P - Open-market purchase | 26.2K | $10.00 | $262K |
| 2025-10-06 | YCY | AA Mission Acquisition Corp. II | P - Open-market purchase | 334.0K | $10.00 | $3.34M |
Most Active Insiders Right Now
Qing Bill Sun 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:
- R01 Fund LP
- RA CAPITAL MANAGEMENT, L.P.
- Bradley Louis Radoff
- RBC Global Asset Management (U.S.) Inc.
- Redmile Group, LLC
- Andrew Phillips Reed
- Daniel Reis-Faria
- Saul B. Rosenthal
Frequently Asked Questions
Who is Qing Bill Sun?
Qing Bill Sun is the Chief Executive Officer at AA Mission Acquisition Corp. II (YCY). Sun has reported 2 insider filings with the SEC since 2025. The most recent filing was in October 2025.…
Has Qing Bill Sun been buying or selling stock?
Recorded transactions: 4 open-market purchases ($5.40M) and 0 open-market sales across all tracked filings.
How accurate is Qing Bill Sun's historical track record?
Across 4 tracked purchases, Qing Bill Sun averaged no 30-day data yet with a win rate pending. InsiderAlpha rates the track record at –/5 stars.
Where can I see all of Qing Bill Sun'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 Qing Bill Sun profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.