Jiandong Xu - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 4, 2026
Jiandong Xu is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days. Lifetime open-market purchases: $3K. Historical track record: 5/5 stars across 3 tracked purchases.
Profile
Jiandong Xu holds the role of Chief Financial Officer at Estrella Immunopharma, Inc. (ESLA). Xu has reported 1 insider filing with the SEC since 2026. The most recent filing was in April 2026.
| Role | Chief Financial Officer |
|---|---|
| Notability | 34/100 |
Board memberships
- Estrella Immunopharma, Inc.
Reported roles
- Chief Financial Officer
Track Record
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realized performance after each tracked open-market purchase.
| InsiderAlpha rating | ★★★★★ (5/5) |
|---|---|
| Total purchases tracked | 3 |
| Purchases with forward-return data | 3 |
| 30-day win rate | 100% |
| 90-day win rate | 100% |
| Avg 5-day return | +9.78% |
| Avg 30-day return | +88.06% |
| Avg 90-day return | +45.83% |
| Best 30-day return | +119.10% |
Trading Pattern
InsiderAlpha's records for Jiandong Xu go back to 2026: 1 primary Form 4 filing, an average of 1.0 per year. The typical open-market purchase is $865 (3 buys totaling $3K). The largest single buy on record is $1K of ESLA in 2026. 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 Jiandong Xu 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 Financial Officer at Estrella Immunopharma, Inc. (ESLA) - 1 filing, 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-04-30 | ESLA | Estrella Immunopharma, Inc. | P - Open-market purchase | 1.0K | $1.33 | $1K |
| 2026-04-30 | ESLA | Estrella Immunopharma, Inc. | P - Open-market purchase | 1.0K | $1.16 | $1K |
| 2026-04-30 | ESLA | Estrella Immunopharma, Inc. | P - Open-market purchase | 100 | $1.04 | $104 |
Most Active Insiders Right Now
Jiandong Xu 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.
- Magnetar Financial LLC - $8.53B of CRWV open-market activity in the last 90 days
- VisionWave Holdings, Inc. - $7.98B of SVRE 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
- SGF FANG Holdings, LP - $2.04B of FANG open-market activity in the last 90 days
- BCP 8 Holdings Mozart Manager L.L.C. - $1.22B of MDLN open-market activity in the last 90 days
- BX Mozart ML-2 Holdco L.P. - $1.22B of MDLN 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 Jiandong Xu?
Jiandong Xu holds the role of Chief Financial Officer at Estrella Immunopharma, Inc. (ESLA). Xu has reported 1 insider filing with the SEC since 2026. The most recent filing was in April 2026.…
Has Jiandong Xu been buying or selling stock?
Recorded transactions: 3 open-market purchases ($3K) and 0 open-market sales across all tracked filings.
How accurate is Jiandong Xu's historical track record?
Across 3 tracked purchases, Jiandong Xu averaged +88.1% avg 30-day return with a 100% 30-day win rate. InsiderAlpha rates the track record at 5/5 stars.
Where can I see all of Jiandong Xu'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 Jiandong Xu profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.