FilingIndex
8-KThe WireRed Alert

Executive Change · Results of Operations

Filed Jan 12, 2026 · 5mo ago · Accession 0001628280-26-001730

Plain English

Material event — a significant development the company must disclose promptly.

Read the source below for the full document.

Read the original on SEC.gov ↗
Filing details
Ticker
DUOL
CIK
1562088
Form type
8-K
Filing date
Jan 12, 2026
Report date
Jan 8, 2026
Document
duol-20260108.htm
Size
10.4 MB