Duolingo Inc. Discloses Reg FD Incident Showing Preliminary DAU Growth

What Happened
On August 18, 2026 Duolingo, Inc. (DUOL) filed a Form 8-K disclosing that, during an in-person investor meeting at its offices, a meeting-room screen inadvertently displayed preliminary internal metrics. The screen indicated the estimated daily active users (DAU) growth rate on August 17, 2026 was about 27.4% year-over-year and that similar estimated growth rates appeared for prior days in August. The company emphasized this data is preliminary, has not completed normal review and validation, and should not be read as indicative of Q3 2026 or future results. Duolingo referenced its most recent guidance in the Q2 2026 shareholder letter dated August 5, 2026 and said it does not intend to provide updated guidance now.

Key Details

• Date of incident: August 18, 2026 (accidental display); metric shown for August 17, 2026.
• Preliminary DAU estimate shown: ~27.4% year-over-year growth for Aug 17, 2026.
• Company statement: data is unvalidated preliminary internal information and not indicative of expected Q3 2026 results.
• Disclosure status: information furnished in the 8-K and expressly not “filed” under Section 18 (i.e., not subject to certain liabilities).

Why It Matters
For investors, this filing clarifies that what was briefly visible to certain investors was unverified internal data—not official, audited results or new guidance. Because the company has not validated those figures and is not updating its prior guidance, investors should rely on Duolingo’s published Q2 2026 shareholder letter (Aug 5, 2026) and future formal disclosures for material performance information. The 8-K aims to satisfy Regulation FD requirements by publicly disclosing the inadvertent leak and limiting legal exposure by furnishing (not filing) the information.