=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-08-17
10b5-1 Pre-arranged Plan: Yes
--- Issuer ---
Name: Duolingo, Inc. (DUOL)
CIK: 0001562088
--- Reporting Owner ---
Name: Glance Natalie
CIK: 0001870350
Role: Officer (Chief Engineering Officer)
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Class A Common Stock
Date: 2026-08-17 | Code: S (Open market sale)
Shares: -2,751 | Price: $129.13
Total Value: $355,236.63
Shares Owned After: 170,650 | Ownership: D (Direct)
Footnotes:
[F1] Represents shares automatically sold to satisfy tax withholding obligations in connection with the vesting of restricted stock units and delivery of shares.
[Transaction #2]
Security: Class A Common Stock
Date: 2026-08-18 | Code: S (Open market sale)
Shares: -502 | Price: $137.01
Total Value: $68,778.72
Shares Owned After: 170,148 | Ownership: D (Direct)
Footnotes:
[F2] The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 15, 2025.
[F3] The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $136.68 to $137.61, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.
[Transaction #3]
Security: Class A Common Stock
Date: 2026-08-18 | Code: S (Open market sale)
Shares: -1,037 | Price: $138.19
Total Value: $143,299.92
Shares Owned After: 169,111 | Ownership: D (Direct)
Footnotes:
[F2] The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 15, 2025.
[F4] The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $137.72 to $138.59, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.
--- Holdings ---
[Holding #1]
Security: Class A Common Stock
Ownership: I (Indirect)
--- Footnotes (Complete Index) ---
F1: Represents shares automatically sold to satisfy tax withholding obligations in connection with the vesting of restricted stock units and delivery of shares.
F2: The sale was effected pursuant to the Reporting Person's Rule 10b5-1 trading plan adopted on September 15, 2025.
F3: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $136.68 to $137.61, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.
F4: The price reported in Column 4 is a weighted average sale price calculated by the broker executing the sales. These shares were sold in multiple transactions at prices ranging from $137.72 to $138.59, inclusive. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.
--- Signature ---
/s/ /s/ Stephen Chen, as Attorney-in-Fact for Natalie Glance (2026-08-19)
