Comparable stake leader
AREO HOLDINGS LTD
SEC ownership of Sunlands Technology Group
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001723935.
Disclosed value leader
AREO HOLDINGS LTD
Comparable rows
7/11
Latest evidence
01 Apr 2026
- Public ticker
- STG on NYSE
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
AREO HOLDINGS LTD
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
7 of 11
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
AREO HOLDINGS LTD
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
01 Apr 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001723935
- Issuer location
- Beijing
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Sunlands Technology Group (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
AREO HOLDINGS LTD
Disclosed value leader
AREO HOLDINGS LTD
Comparable rows
7/11
Latest evidence
01 Apr 2026
13D/G
13F
3/4/5
Lead comparable stake: 12%
4 rows are not safely comparable across share classes.
13D/G row: AREO HOLDINGS LTD
Showing 1-8 of 11 holder rows.
Quick read
AREO HOLDINGS LTD leads the comparable SEC ownership view at 12%.
7 of 11 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens AREO HOLDINGS LTD's linked filing trail.
Comparable ownership
Top 5
AREO HOLDINGS LTD
12%
CITADEL ADVISORS LLC
0.49%
MORGAN STANLEY
0.03%
EverSource Wealth Advisors, LLC
0.01%
UBS Group AG
0.01%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 11 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| AREO HOLDINGS LTD |
13D/G
LAM LAI MING
|
12%
|
$1,564,010
312,802 shares
|
$0 | 31 Dec 2024 |
| CITADEL ADVISORS LLC |
13F
Company
|
0.49%
|
$46,199
13,162 shares
|
— | 31 Mar 2026 |
| MORGAN STANLEY |
13F
Company
|
0.03%
|
$3,005
856 shares
|
— | 31 Mar 2026 |
| EverSource Wealth Advisors, LLC |
13F
Company
|
0.01%
|
$709
202 shares
|
— | 31 Mar 2026 |
| UBS Group AG |
13F
Company
|
0.01%
|
$691
197 shares
|
— | 31 Mar 2026 |
| SBI Securities Co., Ltd. |
13F
Company
|
0%
|
$386
110 shares
|
— | 31 Mar 2026 |
| RHUMBLINE ADVISERS |
13F
Company
|
0%
|
$143
41 shares
|
— | 31 Mar 2026 |
| Peng Ou |
3/4/5
Director, 10%+ Owner
|
—
class O/S missing
|
—
2,833,024 shares
|
— | 01 Apr 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 17 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-4 of 4 reporting-owner rows connected to Sunlands Technology Group. Open a relationship link for the CIK-to-CIK filing trail.
Rows
4
Largest Forms 3/4/5 holder
Gao Jing
Net 12M change
$0
Latest report
01 Apr 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Gao Jing | Director | Mixed | 01 Apr 2026 | |||
| Li Hangyu | Finance Director | Mixed | 01 Apr 2026 | |||
| Tongbo Liu | Chief Executive Officer, Director, 10%+ Owner | Mixed | 01 Apr 2026 | |||
| Peng Ou | Director, 10%+ Owner | Mixed | 01 Apr 2026 |
Recent insider transactions for Sunlands Technology Group
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Peng Ou | STG | Common stock | 0 | 2,833,024 | 01 Apr 2026 | Direct | ||||
| Tongbo Liu | STG | Common stock | 0 | 513,117 | 01 Apr 2026 | Direct | ||||
| Li Hangyu | STG | Common stock | 0 | 6,231 | 01 Apr 2026 | Direct | ||||
| Gao Jing | STG | Common stock | 0 | 60,383 | 01 Apr 2026 | Direct |
* marks a reported price that did not pass the local price check.