Total buying$00 buys
DUOL
Duolingo, Inc.
NasdaqTechnologyServices-Prepackaged Software
Insider activity for last month from 09/19 to 10/19.
How these metrics are calculated
Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total selling$29.8M11 sells
Net open-market−$29.8MBuying minus selling
Active insiders5Distinct reporting owners
Insider activity report
Calendar-month buckets within the selected date range
Latest filing: Oct 14, 2026
Open-market transaction mix · 11 transactions in the selected period
Code A includes awards, grants and other acquisitions; these are not open-market buys. A rolling period can include partial calendar months.
View exact monthly counts and disclosed values
| Month | Buys | Sells | Awards (A) | Buy value | Sell value | Net P/S value |
|---|---|---|---|---|---|---|
| Sep 2026 | 0 | 7 | 0 | $0 | $13.2M | -$13.2M |
| Oct 2026 | 0 | 4 | 4 | $0 | $16.6M | -$16.6M |
Distinct insiders active
Reporting-owner CIKs by month · peak Oct 2026 (5)Sep 2026Oct 2026
Largest insider activity
By absolute net disclosed value · current transaction page- VL-$17.8M
- SM+$17.4k
- BA+$16.2k
- SH+$15.0k
- LO+$14.7k
DUOL transaction history
Newest filings · 20 transactions per pageLatest insider transactions
Form 4 filings from last month.| Company | Insider | Activity | Disclosed value | Filed (ET) |
|---|---|---|---|---|
DUOLDuolingo, Inc. | Shelton James HDIR | A · grantSEC filing ↗ | $14.9kView disclosure → | |
DUOLDuolingo, Inc. | Schlosser MarioDIR | A · grantSEC filing ↗ | $17.3kView disclosure → | |
DUOLDuolingo, Inc. | Lilly III John OsborneDIR | A · grantSEC filing ↗ | $14.6kView disclosure → | |
DUOLDuolingo, Inc. | Bohutinsky AmyDIR | A · grantSEC filing ↗ | $16.1kView disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | C · unknown10b5-1 detectedDerivative securitySEC filing ↗ | $0View disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | C · unknown10b5-1 detectedDerivative securitySEC filing ↗ | $0View disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | M · exercise10b5-1 detectedDerivative securitySEC filing ↗ | $0View disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | S · sale10b5-1 detectedSEC filing ↗ | -$783kView disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | S · sale10b5-1 detectedSEC filing ↗ | -$4.55MView disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | S · sale10b5-1 detectedSEC filing ↗ | -$8.33MView disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | S · sale10b5-1 detectedSEC filing ↗ | -$3.01MView disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | C · unknown10b5-1 detectedSEC filing ↗ | $4.19MView disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | C · unknown10b5-1 detectedDerivative securitySEC filing ↗ | $0View disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | C · unknown10b5-1 detectedDerivative securitySEC filing ↗ | $0View disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | M · exercise10b5-1 detectedDerivative securitySEC filing ↗ | $0View disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | S · sale10b5-1 detectedSEC filing ↗ | -$137kView disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | S · sale10b5-1 detectedSEC filing ↗ | -$1.06MView disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | S · sale10b5-1 detectedSEC filing ↗ | -$5.83MView disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | C · unknown10b5-1 detectedSEC filing ↗ | $1.77MView disclosure → | |
DUOLDuolingo, Inc. | Von Ahn LuisPRES · CEO · CF | C · unknown10b5-1 detectedDerivative securitySEC filing ↗ | $0View disclosure → |
Filing-only signals
Deterministic matches in the selected period
Filing detail checks
Secondary metrics for the selected periodTransaction codes
By Form 4 transaction code in selected period35transactionstxns
- C · Code C · dominant15 · 43%
- S · Open-market sells11 · 31%
- M · Option exercise5 · 14%
- A · Grants / awards4 · 11%
Activity by reported role
A joint filing can contribute to multiple rolesChief executive officer31
CF31
PRES31
Director4
Reported Holdings After
Separated by insider, security, and ownership type
Von Ahn LuisClass A Common Stock · Direct
0Oct 07, 2026
Von Ahn LuisClass B Common Stock · Direct
3,368,120Oct 07, 2026
Von Ahn LuisStock Option (Right to Buy) · Direct
0Oct 07, 2026
Bohutinsky AmyClass A Common Stock · Direct
7,766Oct 10, 2026
Lilly III John OsborneClass A Common Stock · Direct
9,121Oct 10, 2026
Schlosser MarioClass A Common Stock · Direct
4,378Oct 10, 2026
Shelton James HClass A Common Stock · Direct
11,853Oct 10, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Current transaction page only · each cell is a filing date · buys green, sells redSep 19 → Oct 19
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Duolingo, Inc. Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at Duolingo, Inc.?
Shelton James H, Schlosser Mario, Lilly III John Osborne, Bohutinsky Amy, von Ahn Luis.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
Von Ahn Luis reported a sale on Oct 07, 2026 valued at $783k. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $29,899,521.05. Sales can occur for many non-investment reasons.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.