Jack Jiajia Huang serves as Chief Executive Officer of 51Talk Online Education Group (COE). Huang has reported 16 insider filings with the SEC since 2026. The most recent filing was in July 2026.
Every role Jack Jiajia Huang 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.
51Talk Online Education Group (COE)16 filingsUpdated Aug 30, 2026
Jack Jiajia Huang is Chief Executive Officer, Director, 10% Owner of 51Talk Online Education Group (COE). 23 SEC Form 4 filings on record, most recently on 21 August 2026. Most recent open-market trade: bought $737K of COE on 21 August 2026. Lifetime open-market purchases: $230.23M. Historical track record: 3/5 stars across 43 tracked purchases.
Every recent SEC Form 4 transaction Jack Jiajia Huang has reported, most recent first.
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.
| Metric | Value |
|---|---|
| InsiderAlpha rating | ★★★☆☆ (3/5) |
| Total purchases tracked | 43 |
| Purchases with forward-return data | 43 |
| 30-day win rate | 49% |
| 90-day win rate | 0% |
| Avg 5-day return | +3.31% |
| Avg 30-day return | -2.09% |
| Avg 90-day return | -29.98% |
| Best 30-day return |
InsiderAlpha's records for Jack Jiajia Huang go back to 2026: 23 primary Form 4 filings, an average of 23.0 per year. The typical open-market purchase is $1.92M (120 buys totaling $230.23M). The largest single buy on record is $9.33M of COE in 2026. 101 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Insiders who reported open-market trades in the last 12 months at the companies Jack Jiajia Huang files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Jack Jiajia Huang is a corporate insider, tracked as Chief Executive Officer, Director, 10% Owner of 51Talk Online Education Group (COE). InsiderAlpha holds 23 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
16 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 120 open-market purchases ($230.23M) and 0 open-market sales across all tracked filings.
Across 43 tracked purchases, Jack Jiajia Huang averaged -2.1% avg 30-day return with a 49% 30-day win rate. InsiderAlpha rates the track record at 3/5 stars.
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.
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