Duolingo, Inc.

DUOL·NASDAQ·$106.48Share Price as of 11/2·$5BMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/06/26 10-QQ1 ended 03/31/2605/05/26 10-KFY 202502/27/26 10-QQ3 ended 09/30/2511/06/25 10-QQ2 ended 06/30/2508/07/25

Disclosures

8-KCurrent report08/19/26 8-KCurrent report08/10/26 8-KCurrent report08/05/26 8-KCurrent report06/05/26 8-KCurrent report05/04/26

Prospectuses and Registrations

S-8Registration of securities for employees02/27/26 S-8Registration of securities for employees02/28/25 S-8Registration of securities for employees02/29/24 S-8Registration of securities for employees03/01/23 S-8Registration of securities for employees03/04/22

Proxies

DEF 14ADefinitive proxy04/17/26 DEFA14AAdditional proxy materials04/17/26 DEF 14ADefinitive proxy04/25/25 DEFA14AAdditional proxy materials04/25/25 DEFA14AAdditional proxy materials05/23/24

Ownership

SC 13G/ABeneficial ownership (amended)10/20/26 Form 4Insider transaction10/13/26 Form 4Insider transaction10/13/26 Form 4Insider transaction10/13/26 Form 4Insider transaction10/13/26

Other

ARSAnnual report to shareholders04/17/26 ARSAnnual report to shareholders04/25/25 ARSAnnual report to shareholders04/26/24 ARSAnnual report to shareholders04/28/23 CERTCEO/CFO certification07/27/21