United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

US · SEC FORM 4

51Talk Online Education Group

COE · NYSE · CIK 0001659494 · Consumer Defensive · Education & Training Services

INSIDER SIGNAL

61.7 / 100

1 buyers · 107 purchase transaction lines · $212.9M gross purchase

WHY THIS SIGNAL?

Buyer breadthLow

Purchase sizeStrong

RoleModerate

RecencyModerate

ConvictionStrong

Score anatomy

Each bar shows the contribution to the current score; the weights and formula stay unchanged.

Cluster+7.0 / 35

Purchase size+24.9 / 25

Role+13.0 / 20

Recency+6.8 / 10

Conviction+10.0 / 10

What is holding the score back?

⚠ Cluster breadth is moderate · 1 insider(s), not 4+
⚠ Role scores low · most senior buyer: Chief Executive Officer (CEO, chair and 10% owners score lowest)

Purchase-size comments are relative to the model scale. Average daily volume is a separate market-context diagnostic.

US-v1.2 ranks qualifying equity purchases under the current 180-day rules. The score is a research priority, not a return forecast or probability. Backtests have not shown that a higher US score is followed by better returns.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct

Huang Jack JiajiaChief Executive Officer

●○●●●●●●●○●●○●●●●●●●●●●●●●●●●●●●●●●●○●●●●●●○○

Shu TingDirector

○○○○○○○

Lin Frank HurstDirector,TenPercentOwner

○○

Wu XiaoguangDirector

○

● Purchase▼ Sale○ Other

—

Purchase breadth & concentration

QUALIFYING BUYERS1

PURCHASE CONCENTRATION100%Largest buyer: Huang Jack Jiajia · $212.9M

CLUSTER BUYING · 15D1 insiderPeak activity: 2026-04-21–2026-05-06

Roles in the peak window: Chief Executive Officer. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

61.7 / 100

Latest recorded score

↓ -0.2 ptsversus the previous recorded snapshot

Oct 1362.3
Oct 1462.1
Oct 1562.0
Oct 1661.9
Oct 1861.7

Only scores saved when a full US scoring run completed are shown; gaps are not reconstructed.

Recent Form 4 activity

122Purchases

0Sales

20Other Form 4 lines

31SEC filings · 365 days

BUYING107 qualifying P line(s) · 180 days

SELLING0 sale line(s) · context only

OTHER18 exercise / withholding / award / gift / other lines

10b5-1 / PLANNEDNot detected in parsed evidence

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M: +15.3%
3M: -29.2%
6M: -42.7%
12M: -69.8%

Volatility & liquidity

Volatility: 73.0%
Beta: —
Avg daily value: USD 453,886

Valuation

Market cap: —
P/E: —

Fundamentals

Profit margin: -17.6%
ROE: —
Industry: Education & Training Services

Market data

Price data up to: 2026-10-11 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Profit margin · Fiscal year ended: 2025-12-31 · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short: 18,002
Previous report: 23,863
Avg daily volume: 37,145
Days to cover: ≤ 1.0

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction date	Reporting owner	Type	Security	Shares	Avg. price	Approx. value	Source
2026-09-25	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	1,227,600	USD 11.50	USD 14,117,400	SEC filing ↗
2026-09-24	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	2,880	USD 11.50	USD 33,120	SEC filing ↗
2026-09-23	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	897,300	USD 11.50	USD 10,318,950	SEC filing ↗
2026-09-22	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	378,420	USD 11.50	USD 4,351,830	SEC filing ↗
2026-09-18	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	1,920	USD 11.50	USD 22,080	SEC filing ↗
2026-09-17	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	304,020	USD 11.48	USD 3,490,150	SEC filing ↗
2026-08-13	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	35,400	USD 20.83	USD 737,382	SEC filing ↗
2026-08-12	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	337,500	USD 20.17	USD 6,807,375	SEC filing ↗
2026-08-11	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	254,820	USD 19.61	USD 4,997,020	SEC filing ↗
2026-08-10	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	199,980	USD 19.72	USD 3,943,606	SEC filing ↗
2026-08-07	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	90,480	USD 19.39	USD 1,754,407	SEC filing ↗
2026-08-06	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	105,120	USD 19.29	USD 2,027,765	SEC filing ↗
2026-08-05	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	158,460	USD 19.20	USD 3,042,432	SEC filing ↗
2026-08-04	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	125,880	USD 19.06	USD 2,399,273	SEC filing ↗
2026-08-03	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	333,840	USD 18.48	USD 6,169,363	SEC filing ↗

Form 4 evidence

142 transaction lines in the latest 365-day window; 142 in local history.

Date	Owner	Type	Security	Shares	Avg. price	Approx. value	Source
2026-10-02	Shu Ting	Tax withholding (F)	Class A Ordinary Share, par value US$0.0001	4,020	USD 10.46	USD 42,049	SEC filing ↗
2026-10-02	Huang Jack Jiajia	Tax withholding (F)	Class A Ordinary Share, par value US$0.0001	4,020	USD 10.46	USD 42,049	SEC filing ↗
2026-10-01	Shu Ting	Option exercise / conversion (M)	Class A Ordinary Share, par value US$0.0001	18,180	USD 0.00	USD 0	SEC filing ↗

Show recent Form 4 evidence (30 grouped rows)

Date	Owner	Type	Security	Shares	Avg. price	Approx. value	Source
2026-10-02	Shu Ting	Tax withholding (F)	Class A Ordinary Share, par value US$0.0001	4,020	USD 10.46	USD 42,049	SEC filing ↗
2026-10-02	Huang Jack Jiajia	Tax withholding (F)	Class A Ordinary Share, par value US$0.0001	4,020	USD 10.46	USD 42,049	SEC filing ↗
2026-10-01	Shu Ting	Option exercise / conversion (M)	Class A Ordinary Share, par value US$0.0001	18,180	USD 0.00	USD 0	SEC filing ↗
2026-10-01	Lin Frank Hurst	Option exercise / conversion (M)	Class A Ordinary Share, par value US$0.0001	18,180	USD 0.00	USD 0	SEC filing ↗
2026-10-01	Huang Jack Jiajia	Option exercise / conversion (M)	Class A Ordinary Share, par value US$0.0001	18,180	USD 0.00	USD 0	SEC filing ↗
2026-09-25	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	1,227,600	USD 11.50	USD 14,117,400	SEC filing ↗
2026-09-24	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	2,880	USD 11.50	USD 33,120	SEC filing ↗
2026-09-23	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	897,300	USD 11.50	USD 10,318,950	SEC filing ↗
2026-09-22	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	378,420	USD 11.50	USD 4,351,830	SEC filing ↗
2026-09-18	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	1,920	USD 11.50	USD 22,080	SEC filing ↗
2026-09-17	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	304,020	USD 11.48	USD 3,490,150	SEC filing ↗
2026-08-18	Shu Ting	Option exercise / conversion (M)	Class A Ordinary Share, par value US$0.0001	137,500	USD 0.00	USD 0	SEC filing ↗
2026-08-18	Huang Jack Jiajia	Option exercise / conversion (M)	Class A Ordinary Share, par value US$0.0001	137,500	USD 0.00	USD 0	SEC filing ↗
2026-08-13	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	35,400	USD 20.83	USD 737,382	SEC filing ↗
2026-08-12	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	337,500	USD 20.17	USD 6,807,375	SEC filing ↗
2026-08-11	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	254,820	USD 19.61	USD 4,997,020	SEC filing ↗
2026-08-10	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	199,980	USD 19.72	USD 3,943,606	SEC filing ↗
2026-08-07	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	90,480	USD 19.39	USD 1,754,407	SEC filing ↗
2026-08-06	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	105,120	USD 19.29	USD 2,027,765	SEC filing ↗
2026-08-05	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	158,460	USD 19.20	USD 3,042,432	SEC filing ↗
2026-08-04	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	125,880	USD 19.06	USD 2,399,273	SEC filing ↗
2026-08-03	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	333,840	USD 18.48	USD 6,169,363	SEC filing ↗
2026-07-31	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	122,580	USD 17.54	USD 2,150,053	SEC filing ↗
2026-07-30	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	194,460	USD 17.21	USD 3,346,657	SEC filing ↗
2026-07-29	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	109,080	USD 16.91	USD 1,844,543	SEC filing ↗
2026-07-28	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	169,980	USD 16.88	USD 2,869,262	SEC filing ↗
2026-07-27	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	451,320	USD 16.97	USD 7,658,900	SEC filing ↗
2026-07-24	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	185,880	USD 16.26	USD 3,022,409	SEC filing ↗
2026-07-23	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	421,440	USD 15.76	USD 6,643,210	SEC filing ↗
2026-07-22	Huang Jack Jiajia	Purchase (P)	Class A Ordinary Share, par value US$0.0001	183,720	USD 15.97	USD 2,934,047	SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date	2026-10-18
Ranking version	US-v1.2
Data quality	PASS ELIGIBLE · —
Ticker	COE
CIK	0001659494
Sector	Consumer Defensive
Industry	Education & Training Services Yahoo Finance
SEC SIC	8200 Services-Educational Services
Exchange	NYSE

Data coverage

Local Form 4 history	142 transaction lines from 2026-03-26 to 2026-10-02 122 P purchase lines · 0 S sale lines · 20 other lines
SEC company submissions	Open SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.