Huang Jack Jiajia
SEC Form 4 insiderChief Executive Officer · 51Talk Online Education Group ($COE)
4 theses · first seen Aug 12, 2026
| Window | Theses | Resolved | Wins | Win rate | Avg return | Median return |
|---|
| 1d | 3 | 3 | 2 | 67% | +3.6% | +2.6% |
| 3d | 4 | 4 | 2 | 50% | +1.9% | -0.2% |
| 1w | 4 | 4 | 1 | 25% | -10.7% | -13.0% |
| 1m | 4 | 4 | 0 | 0% | -32.8% | -37.8% |
| 3m | 2 | 2 | 0 | 0% | -46.8% | -46.8% |
| 6m | 0 | 0 | 0 | — | — | — |
| 1y | 0 | 0 | 0 | — | — | — |
Past performance does not predict future results. Informational only, not investment advice.
Long 2,812,140 shares of COE
Bought 2,812,140 @ $11.50 avg · $32,333,530 · 2026-09-17
Form 4: Huang Jack Jiajia bought COE
Huang Jack Jiajia (Chief Executive Officer at 51Talk Online Education Group) reported an open-market purchase of 2,812,140 shares of COE at an average $11.50, roughly $32,333,530, in a Form 4 filed 2026-10-08.
At post $10.79·Now $11.43+5.9% since postedas of Nov 13, 4:45 PM ET
1d+13.3%
3d+13.3%
1w+8.4%
1m-6.7%
3m—
6m—
1y—
$COESEC Form 4bullish10b5-1 plan Long 187,020 shares of COE
Bought 187,020 @ $21.02 avg · $3,932,015 · 2026-04-10
Form 4: Huang Jack Jiajia bought COE
Huang Jack Jiajia (Chief Executive Officer at 51Talk Online Education Group) reported an open-market purchase of 187,020 shares of COE at an average $21.02, roughly $3,932,015, in a Form 4 filed 2026-08-21. Transaction was made under a pre-arranged 10b5-1 plan.
At post $16.43·Now $11.43-30.4% since postedas of Nov 13, 4:45 PM ET
1d—
3d+2.3%
1w-6.6%
1m-28.1%
3m—
6m—
1y—
$COESEC Form 4bullish10b5-1 plan Long 592,320 shares of COE
Bought 592,320 @ $19.93 avg · $11,804,395 · 2026-08-11
Form 4: Huang Jack Jiajia bought COE
Huang Jack Jiajia (Chief Executive Officer at 51Talk Online Education Group) reported an open-market purchase of 592,320 shares of COE at an average $19.93, roughly $11,804,395, in a Form 4 filed 2026-08-13. Transaction was made under a pre-arranged 10b5-1 plan.
At post $20.74·Now $11.43-44.9% since postedas of Nov 13, 4:45 PM ET
1d-5.2%
3d-5.2%
1w-25.3%
1m-48.8%
3m-48.7%
6m—
1y—
$COESEC Form 4bullish10b5-1 plan Long 395,580 shares of COE
Bought 395,580 @ $19.53 avg · $7,725,778 · 2026-08-06
Form 4: Huang Jack Jiajia bought COE
Huang Jack Jiajia (Chief Executive Officer at 51Talk Online Education Group) reported an open-market purchase of 395,580 shares of COE at an average $19.53, roughly $7,725,778, in a Form 4 filed 2026-08-12. Transaction was made under a pre-arranged 10b5-1 plan.
At post $20.21·Now $11.43-43.4% since postedas of Nov 13, 4:45 PM ET
1d+2.6%
3d-2.7%
1w-19.3%
1m-47.5%
3m-44.8%
6m—
1y—