Chen Stephen C.
CIK 0001869758 Name as filed on the most recent filing
Filed as Chen Stephen C. (33)
92 transaction lines · from 33 filings · filed 2021-11-17 to 2026-08-19 The span is the filing dates this catalog holds, not the entity's full filing history. Absence here is not evidence of absence at the SEC.
A line appears here when the filing that carries it names this CIK as a reporting owner, not only when the parser picked this CIK as the line's primary owner. That is why a joint filing appears on both owners' pages rather than vanishing from the second one. The catalog never merges two CIKs into one person and never splits one CIK into two: identity here is the SEC's own identifier and nothing else.
Issuers this insider has filed against
Ordered by last-seen filing date, newest first. Roles are as filed on the Form 4 and are not normalised.
This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-20 05:22 UTC.
No issuer is recorded
The catalog holds no filing linking this CIK to an issuer.
Transactions
Every stored Form 4 line naming this reporting owner, newest transaction date first. Each row links to the filing it came from.
92 transactions · Newest transaction date first, id breaking the tie.
This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-20 05:22 UTC.
| Direction | Date | Issuer | Code | Shares | Price | Value USD | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-17 |
Duolingo, Inc. DUOL |
S, Open-market sale | 1,024 disposed | 129.13 | 132,229.12 | Form 4, filing 0001628280-26-058019 | |
| 2026-05-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 1,277 disposed | 113.27 | 144,647.58 | Form 4, filing 0001628280-26-036519 | |
| 2026-05-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 700 disposed | 114.22 | 79,955.12 | Form 4, filing 0001628280-26-036519 | |
| 2026-05-15 |
Duolingo, Inc. DUOL |
S, Open-market sale | 820 disposed | 112.16 | 91,971.20 | Form 4, filing 0001628280-26-036519 | |
| 2026-02-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 821 disposed | 111.83 | 91,812.43 | Form 4, filing 0001628280-26-009985 | |
| 2026-02-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 520 disposed | 114.55 | 59,566.99 | Form 4, filing 0001628280-26-009985 | |
| 2026-02-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 480 disposed | 113.95 | 54,696.19 | Form 4, filing 0001628280-26-009985 | |
| 2026-02-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 80 disposed | 115.47 | 9,237.60 | Form 4, filing 0001628280-26-009985 | |
| 2026-02-17 |
Duolingo, Inc. DUOL |
S, Open-market sale | 896 disposed | 110.06 | 98,613.76 | Form 4, filing 0001628280-26-009985 | |
| 2025-11-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 594 disposed | 175.15 | 104,039.81 | Form 4, filing 0001628280-25-053186 | |
| 2025-11-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 480 disposed | 177.19 | 85,049.18 | Form 4, filing 0001628280-25-053186 | |
| 2025-11-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 320 disposed | 175.94 | 56,299.62 | Form 4, filing 0001628280-25-053186 | |
| 2025-11-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 120 disposed | 173.97 | 20,876.40 | Form 4, filing 0001628280-25-053186 | |
| 2025-11-17 |
Duolingo, Inc. DUOL |
S, Open-market sale | 1,282 disposed | 177.95 | 228,131.90 | Form 4, filing 0001628280-25-053186 | |
| 2025-08-26 |
Duolingo, Inc. DUOL |
S, Open-market sale | 1,515 disposed | 321.36 | 486,860.40 | Form 4, filing 0001562088-25-000199 | |
| 2025-08-15 |
Duolingo, Inc. DUOL |
S, Open-market sale | 1,282 disposed | 329.03 | 421,816.46 | Form 4, filing 0001562088-25-000184 | |
| 2025-05-16 |
Duolingo, Inc. DUOL |
S, Open-market sale | 1,268 disposed | 525.07 | 665,794.97 | Form 4, filing 0001562088-25-000114 | |
| 2025-05-16 |
Duolingo, Inc. DUOL |
S, Open-market sale | 467 disposed | 529.25 | 247,161.38 | Form 4, filing 0001562088-25-000114 | |
| 2025-05-16 |
Duolingo, Inc. DUOL |
S, Open-market sale | 300 disposed | 527.61 | 158,282.01 | Form 4, filing 0001562088-25-000114 | |
| 2025-05-16 |
Duolingo, Inc. DUOL |
S, Open-market sale | 300 disposed | 526.44 | 157,932.99 | Form 4, filing 0001562088-25-000114 | |
| 2025-05-16 |
Duolingo, Inc. DUOL |
S, Open-market sale | 200 disposed | 531.44 | 106,287.00 | Form 4, filing 0001562088-25-000114 | |
| 2025-05-16 |
Duolingo, Inc. DUOL |
S, Open-market sale | 100 disposed | 530.22 | 53,022.00 | Form 4, filing 0001562088-25-000114 | |
| 2025-05-15 |
Duolingo, Inc. DUOL |
S, Open-market sale | 1,257 disposed | 531.71 | 668,359.47 | Form 4, filing 0001562088-25-000110 | |
| 2025-02-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 1,166 disposed | 435.00 | 507,210.00 | Form 4, filing 0001562088-25-000026 | |
| 2025-02-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 898 disposed | 435.28 | 390,881.44 | Form 4, filing 0001562088-25-000026 | |
| 2024-11-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 1,767 disposed | 307.95 | 544,146.94 | Form 4, filing 0001562088-24-000264 | |
| 2024-11-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 400 disposed | 309.87 | 123,947.00 | Form 4, filing 0001562088-24-000264 | |
| 2024-11-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 275 disposed | 307.04 | 84,434.76 | Form 4, filing 0001562088-24-000264 | |
| 2024-11-18 |
Duolingo, Inc. DUOL |
S, Open-market sale | 200 disposed | 312.19 | 62,438.00 | Form 4, filing 0001562088-24-000264 | |
| 2024-11-15 |
Duolingo, Inc. DUOL |
S, Open-market sale | 1,249 disposed | 309.30 | 386,315.70 | Form 4, filing 0001562088-24-000260 | |
| 2024-08-30 |
Duolingo, Inc. DUOL |
S, Open-market sale | 5,677 disposed | 212.69 | 1,207,465.54 | Form 4, filing 0001562088-24-000226 | |
| 2024-08-30 |
Duolingo, Inc. DUOL |
S, Open-market sale | 3,459 disposed | 213.42 | 738,208.37 | Form 4, filing 0001562088-24-000226 | |
| 2024-08-30 |
Duolingo, Inc. DUOL |
S, Open-market sale | 3,173 disposed | 209.54 | 664,869.47 | Form 4, filing 0001562088-24-000226 | |
| 2024-08-30 |
Duolingo, Inc. DUOL |
S, Open-market sale | 2,977 disposed | 211.62 | 630,005.24 | Form 4, filing 0001562088-24-000226 | |
| 2024-08-30 |
Duolingo, Inc. DUOL |
S, Open-market sale | 2,815 disposed | 210.62 | 592,902.62 | Form 4, filing 0001562088-24-000226 | |
| 2024-08-30 |
Duolingo, Inc. DUOL |
S, Open-market sale | 1,363 disposed | 208.53 | 284,222.98 | Form 4, filing 0001562088-24-000226 | |
| 2024-08-15 |
Duolingo, Inc. DUOL |
S, Open-market sale | 1,249 disposed | 199.50 | 249,175.50 | Form 4, filing 0001562088-24-000216 | |
| 2024-05-15 |
Duolingo, Inc. DUOL |
S, Open-market sale | 988 disposed | Not reported | Not priced | Form 4, filing 0001562088-24-000128 | |
| 2024-02-15 |
Duolingo, Inc. DUOL |
S, Open-market sale | 988 disposed | Not reported | Not priced | Form 4, filing 0001562088-24-000034 | |
| 2024-02-09 |
Duolingo, Inc. DUOL |
S, Open-market sale | 2,000 disposed | 190.00 | 380,000.00 | Form 4, filing 0001562088-24-000023 | |
| 2024-01-04 |
Duolingo, Inc. DUOL |
S, Open-market sale | 5,396 disposed | 205.20 | 1,107,280.24 | Form 4, filing 0001562088-24-000006 | |
| 2024-01-04 |
Duolingo, Inc. DUOL |
S, Open-market sale | 4,722 disposed | 208.17 | 982,984.41 | Form 4, filing 0001562088-24-000006 | |
| 2024-01-04 |
Duolingo, Inc. DUOL |
S, Open-market sale | 3,840 disposed | 205.98 | 790,980.10 | Form 4, filing 0001562088-24-000006 | |
| 2024-01-04 |
Duolingo, Inc. DUOL |
S, Open-market sale | 2,091 disposed | 209.01 | 437,030.08 | Form 4, filing 0001562088-24-000006 | |
| 2024-01-04 |
Duolingo, Inc. DUOL |
S, Open-market sale | 1,586 disposed | 207.19 | 328,599.53 | Form 4, filing 0001562088-24-000006 | |
| 2024-01-04 |
Duolingo, Inc. DUOL |
S, Open-market sale | 365 disposed | 210.29 | 76,754.35 | Form 4, filing 0001562088-24-000006 | |
| 2023-11-15 |
Duolingo, Inc. DUOL |
S, Open-market sale | 988 disposed | 209.78 | 207,262.64 | Form 4, filing 0001562088-23-000234 | |
| 2023-09-11 |
Duolingo, Inc. DUOL |
S, Open-market sale | 8,742 disposed | 160.38 | 1,402,002.62 | Form 4, filing 0001562088-23-000198 | |
| 2023-09-11 |
Duolingo, Inc. DUOL |
S, Open-market sale | 100 disposed | 161.00 | 16,100.00 | Form 4, filing 0001562088-23-000198 | |
| 2023-09-08 |
Duolingo, Inc. DUOL |
S, Open-market sale | 5,325 disposed | 160.08 | 852,437.18 | Form 4, filing 0001562088-23-000198 |
This column is intentionally blank
No transaction line is stored for this reporting owner, though the catalog holds filings naming them. That happens when the filings report only holdings or only positions the store does not carry, and when a parse failed; each filing page states its own parse status.
- S, Open-market sale
- Open-market sale
Every value is as reported on the Form 4. A price the filing did not report is marked Not reported and no value is computed from it. Codes outside the open market, drawn in grey behind a dashed rule, are compensation and administrative machinery rather than a decision to trade at the prevailing price.
What this insider's stored lines contain
Exact counts over every stored line for this entity. This is a statement of composition, not a filter: the only filter this page offers is the open-market one above, because that is the only one an index serves today.
- Open-market purchase 0
- Open-market sale 92
- Option exercise 0
- Grant or award 0
- Tax withholding 0
- Disposition to the issuer 0
- In-the-money option exercise 0
How to cite this page
ebomi catalog. Chen Stephen C., insider transactions. Retrieved 2026-08-21 from https://ebomi.com/insider/0001869758
Balogh, A. Insider trading. Scientific Data 10, 237 (2023) doi:10.1038/s41597-023-02147-6