Huang Jack Jiajia

SEC Form 4 insider

Chief Executive Officer · 51Talk Online Education Group ($COE)

3 theses · first seen Aug 12, 2026

Window	Theses	Resolved	Wins	Win rate	Avg return	Median return
1d	2	2	1	50%	-1.3%	-1.3%
3d	3	3	1	33%	-1.9%	-2.7%
1w	3	3	0	0%	-17.1%	-19.3%
1m	1	1	0	0%	-47.5%	-47.5%
3m	0	0	0	—	—	—
6m	0	0	0	—	—	—
1y	0	0	0	—	—	—

Past performance does not predict future results. Informational only, not investment advice.

Thesis history

$COESEC Form 4bullish10b5-1 plan

Huang Jack Jiajia · Chief Executive Officer at 51Talk Online Education Group · 41d ago2 prior · awaiting results

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 $16.43Now $11.82-28.1% since postedas of Sep 18, 4:30 PM ET

1d—

3d+2.3%

1w-6.6%

1m—

3m—

6m—

1y—

View filing on SEC.gov →

$COESEC Form 4bullish10b5-1 plan

Huang Jack Jiajia · Chief Executive Officer at 51Talk Online Education Group · 49d ago2 prior · awaiting results

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 $20.74Now $11.82-43.0% since postedas of Sep 18, 4:30 PM ET

1d-5.2%

3d-5.2%

1w-25.3%

1m-48.8%

3m—

6m—

1y—

View filing on SEC.gov →

$COESEC Form 4bullish10b5-1 plan

Huang Jack Jiajia · Chief Executive Officer at 51Talk Online Education Group · 50d ago2 prior · awaiting results

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 $20.21Now $11.82-41.5% since postedas of Sep 18, 4:30 PM ET

1d+2.6%

3d-2.7%

1w-19.3%

1m-47.5%

3m—

6m—

1y—

View filing on SEC.gov →

End of results.