{"version":1,"company":{"symbol":"DUOL","name":"Duolingo, Inc.","exchange":"Nasdaq","industry":"Services-Prepackaged Software","sic":"7372","division":"Services","index":"S&P MidCap 400","cik":1562088,"fye":"12-31","price":{"date":"2026-10-23","close":142.97,"high_52w":313.45,"low_52w":90.03},"deep":true,"std":true,"ratios":true,"charts":true,"catalogue":true,"ids":{"figi":"BBG003D4V951","composite_figi":"BBG003D4V951","share_class_figi":"BBG003D4V960"}},"metrics":{"revenue_q":298454000,"revenue_yoy_q":18.3097,"net_income_q":33158000,"net_income_yoy_q":-25.9552,"eps_q":0.66,"revenue_ttm":1145002000,"net_income_ttm":410767000,"eps_ttm":8.49,"revenue_growth_ttm":29.3565,"profit_growth_ttm":250.5346,"gross_margin_ttm":72.7174,"operating_margin_ttm":13.7192,"net_margin_ttm":35.8748,"ocf_ttm":430548000,"capex_ttm":22617000,"fcf_ttm":407931000,"fcf_margin_ttm":35.6271,"cash_conversion_ttm":1.0482,"tax_rate_ttm":-103.483,"interest_cover_ttm":null,"roe_ttm":29.1377,"roce_ttm":11.1428,"debt_to_equity":0,"net_debt":-1180887000,"cash":1180887000,"debt":0,"equity":1409742000,"assets":2073953000,"shares_out":16645000,"share_count_change_1y":null,"buybacks_ttm":null,"buybacks_2q":69603000,"dividends_paid_ttm":null,"dps_ttm":null,"revenue_fy":1037589000,"net_income_fy":414065000,"revenue_cagr_3y":41.0822,"profit_cagr_3y":null,"revenue_cagr_5y":45.0325,"profit_cagr_5y":null,"revenue_cagr_10y":null,"profit_cagr_10y":null,"roe_fy":30.7397,"roe_avg_3y":14.6443,"price":142.97,"market_cap":2379735650,"pe_ttm":16.8398,"pe_fy":null,"dividend_yield_fy":null,"dividends_paid_fy":null,"pb":1.6881,"ev":1198848650,"ebitda_ttm":172884000,"ev_ebitda":6.9344,"dividend_yield":null,"mcap_sales":2.0784,"high_52w":313.45,"low_52w":90.03,"price_change_1y":-54.3883,"price_cagr_3y":-3.8358,"price_cagr_5y":-4.3162,"fcf_margin_years_over_20":3,"dividend_years_10":null,"share_count_down_3y":0,"net_debt_change_1y":-204656000,"funds_adding":3,"funds_trimming":5,"funds_net_bought":-61780922.5665,"funds_net_bought_pct":-3.227,"funds_holding":10,"insider_buys_12m":1,"insider_sales_12m":85,"house_trades_6m":0,"days_to_cover":6.72,"put_call_oi":0.51,"eightks_12m":9,"planned_sales_12m":33,"debt_basis":"no borrowings on the balance sheet"},"years":{"cols":["fy","end","filed","form","url","revenue","operating_income","net_income","eps","fcf"],"rows":[["FY2020","2020-12-31","2022-03-04","10-K","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000039/",161696000,-16011000,-15776000,-1.24,14332000],["FY2021","2021-12-31","2022-03-04","10-K","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000039/",250772000,-60007000,-60135000,-2.57,5584000],["FY2022","2022-12-31","2023-03-01","10-K","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000052/",369495000,-65195000,-59574000,-1.51,48094000],["FY2023","2023-12-31","2024-02-29","10-K","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000050/",531109000,-13259000,16067000,0.35,150423000],["FY2024","2024-12-31","2025-02-28","10-K","https://www.sec.gov/Archives/edgar/data/1562088/000156208825000042/",748024000,62595000,88574000,1.88,273397000],["FY2025","2025-12-31","2026-02-27","10-K","https://www.sec.gov/Archives/edgar/data/1562088/000162828026012494/",1037589000,135570000,414065000,8.57,369727000]]},"quarters":{"cols":["q","end","filed","revenue","net_income","eps"],"rows":[["Q3 FY2021","2021-09-30","2021-11-12",63595000,-28970000,-0.98],["Q4 FY2021","2021-12-31","2022-03-04",73014000,-17517000,-0.54],["Q1 FY2022","2022-03-31","2022-05-13",81220000,-12154000,-0.31],["Q2 FY2022","2022-06-30","2022-08-05",88386000,-15045000,-0.38],["Q3 FY2022","2022-09-30","2022-11-14",96065000,-18445000,-0.46],["Q4 FY2022","2022-12-31","2023-03-01",103824000,-13930000,-0.35],["Q1 FY2023","2023-03-31","2023-05-10",115661000,-2582000,-0.06],["Q2 FY2023","2023-06-30","2023-08-09",126839000,3725000,0.08],["Q3 FY2023","2023-09-30","2023-11-09",137624000,2807000,0.06],["Q4 FY2023","2023-12-31","2024-02-29",150985000,12117000,0.26],["Q1 FY2024","2024-03-31","2024-05-09",167553000,26956000,0.57],["Q2 FY2024","2024-06-30","2024-08-08",178327000,24351000,0.51],["Q3 FY2024","2024-09-30","2024-11-07",192594000,23360000,0.49],["Q4 FY2024","2024-12-31","2025-02-28",209550000,13907000,0.31],["Q1 FY2025","2025-03-31","2025-05-02",230743000,35135000,0.72],["Q2 FY2025","2025-06-30","2025-08-07",252265000,44781000,0.91],["Q3 FY2025","2025-09-30","2025-11-06",271713000,292195000,5.95],["Q4 FY2025","2025-12-31","2026-02-27",282868000,41954000,0.99],["Q1 FY2026","2026-03-31","2026-05-05",291967000,43460000,0.89],["Q2 FY2026","2026-06-30","2026-08-06",298454000,33158000,0.66]]},"segments":{"geography":{"years":["2020-12-31","2021-12-31","2022-12-31","2023-12-31","2024-12-31","2025-12-31"],"rows":[{"label":"Rest of World","values":{"2020-12-31":75473000,"2021-12-31":116446000,"2022-12-31":201175000,"2023-12-31":292350000,"2024-12-31":436485000,"2025-12-31":645375000}},{"label":"United States","values":{"2020-12-31":70978000,"2021-12-31":109163000,"2022-12-31":168320000,"2023-12-31":238759000,"2024-12-31":311539000,"2025-12-31":392214000}},{"label":"United Kingdom","values":{"2020-12-31":15245000,"2021-12-31":25163000,"2022-12-31":null,"2023-12-31":null,"2024-12-31":null,"2025-12-31":null}}],"last":"2025-12-31"}},"insider":{"cols":["date","filed","who","role","kind","shares","price","value","after","url"],"rows":[["2026-10-10","2026-10-13","Shelton James H","Director","Took pay in stock",100,149.92,14992,null,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026065790/"],["2026-10-10","2026-10-13","Schlosser Mario","Director","Took pay in stock",116,149.92,17391,null,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026065789/"],["2026-10-10","2026-10-13","Lilly Iii John Osborne","Director","Took pay in stock",98,149.92,14692,null,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026065788/"],["2026-10-10","2026-10-13","Bohutinsky Amy","Director","Took pay in stock",108,149.92,16191,null,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026065787/"],["2026-10-07","2026-10-09","Von Ahn Luis","President & CEO, Co-Founder","Sale under a trading plan",20025,150.63,3016404,90021,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026065528/"],["2026-10-07","2026-10-09","Von Ahn Luis","President & CEO, Co-Founder","Sale under a trading plan",55036,151.52,8339286,34985,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026065528/"],["2026-10-07","2026-10-09","Von Ahn Luis","President & CEO, Co-Founder","Sale under a trading plan",29871,152.47,4554533,5114,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026065528/"],["2026-10-07","2026-10-09","Von Ahn Luis","President & CEO, Co-Founder","Sale under a trading plan",5114,153.26,783777,0,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026065528/"],["2026-09-24","2026-09-28","Von Ahn Luis","President & CEO, Co-Founder","Sale under a trading plan",38758,150.45,5831145,7924,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026063709/"],["2026-09-24","2026-09-28","Von Ahn Luis","President & CEO, Co-Founder","Sale under a trading plan",7024,151.42,1063588,900,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026063709/"],["2026-09-24","2026-09-28","Von Ahn Luis","President & CEO, Co-Founder","Sale under a trading plan",900,152.29,137061,0,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026063709/"],["2026-09-22","2026-09-23","Von Ahn Luis","President & CEO, Co-Founder","Sale under a trading plan",200,150,30000,3414,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026063251/"],["2026-09-22","2026-09-23","Von Ahn Luis","President & CEO, Co-Founder","Sale under a trading plan",3414,152.02,518996,0,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026063251/"],["2026-09-21","2026-09-23","Von Ahn Luis","President & CEO, Co-Founder","Sale under a trading plan",33257,150.46,5003985,4109,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026063251/"],["2026-09-21","2026-09-23","Von Ahn Luis","President & CEO, Co-Founder","Sale under a trading plan",4109,151.07,620746,0,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026063251/"],["2026-09-16","2026-09-18","Von Ahn Luis","President & CEO, Co-Founder","Sale under a trading plan",27272,150.17,4095570,1020,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026062790/"],["2026-09-16","2026-09-18","Von Ahn Luis","President & CEO, Co-Founder","Sale under a trading plan",1020,151.54,154571,0,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026062790/"],["2026-09-14","2026-09-15","Chen Stephen C.","General Counsel","Sale under a trading plan",2107,147.43,310635,49734,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026062115/"],["2026-09-14","2026-09-15","Chen Stephen C.","General Counsel","Sale under a trading plan",5965,150,894750,43769,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026062115/"],["2026-09-08","2026-09-10","Gordon William B","Director","Sale under a trading plan",800,143.83,115068,77615,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026061361/"],["2026-09-08","2026-09-10","Gordon William B","Director","Sale under a trading plan",2742,144.59,396458,74873,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026061361/"],["2026-09-08","2026-09-10","Gordon William B","Director","Sale under a trading plan",3483,145.91,508198,71390,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026061361/"],["2026-09-08","2026-09-10","Gordon William B","Director","Sale under a trading plan",2675,146.58,392114,68715,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026061361/"],["2026-09-08","2026-09-10","Gordon William B","Director","Sale under a trading plan",200,148.68,29735,68515,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026061361/"],["2026-09-08","2026-09-10","Gordon William B","Director","Sale under a trading plan",100,151.64,15164,68415,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026061361/"],["2026-08-18","2026-08-19","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",502,137.01,68779,170148,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026058021/"],["2026-08-18","2026-08-19","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",1037,138.19,143300,169111,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026058021/"],["2026-08-17","2026-08-19","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",2751,129.13,355237,170650,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026058021/"],["2026-08-17","2026-08-19","Meese Robert","Chief Business Officer","Sale outside a trading plan",1354,129.13,174842,169391,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026058020/"],["2026-08-17","2026-08-19","Chen Stephen C.","General Counsel","Sale outside a trading plan",1024,129.13,132229,51841,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026058019/"],["2026-07-10","2026-07-14","Shelton James H","Director","Took pay in stock",120,124.76,14971,null,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026048225/"],["2026-07-10","2026-07-14","Bohutinsky Amy","Director","Took pay in stock",130,124.76,16219,null,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026048223/"],["2026-07-10","2026-07-14","Schlosser Mario","Director","Took pay in stock",140,124.76,17466,null,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026048221/"],["2026-07-10","2026-07-14","Lilly Iii John Osborne","Director","Took pay in stock",118,124.76,14722,null,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026048219/"],["2026-05-18","2026-05-19","Chen Stephen C.","General Counsel","Sale under a trading plan",1277,113.27,144648,53507,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026036519/"],["2026-05-18","2026-05-19","Chen Stephen C.","General Counsel","Sale under a trading plan",700,114.22,79955,52807,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026036519/"],["2026-05-18","2026-05-19","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",2060,113.21,233215,174701,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026036518/"],["2026-05-18","2026-05-19","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",1300,114.19,148441,173401,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026036518/"],["2026-05-15","2026-05-19","Chen Stephen C.","General Counsel","Sale under a trading plan",820,112.16,91971,54784,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026036519/"],["2026-05-15","2026-05-19","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",1929,112.16,216357,176761,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026036518/"],["2026-05-15","2026-05-19","Meese Robert","Chief Business Officer","Sale outside a trading plan",1420,112.16,159267,170745,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026036517/"],["2026-03-03","2026-03-04","Shelton James H","Director","Purchase",5000,99.76,498792,9632,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026014695/"],["2026-02-18","2026-02-20","Skaruppa Matthew","Chief Financial Officer","Sale under a trading plan",1626,112.26,182529,33991,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009986/"],["2026-02-18","2026-02-20","Skaruppa Matthew","Chief Financial Officer","Sale under a trading plan",236,113.37,26755,33755,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009986/"],["2026-02-18","2026-02-20","Skaruppa Matthew","Chief Financial Officer","Sale under a trading plan",1764,114.35,201705,31991,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009986/"],["2026-02-18","2026-02-20","Skaruppa Matthew","Chief Financial Officer","Sale under a trading plan",360,115.29,41503,31631,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009986/"],["2026-02-18","2026-02-20","Chen Stephen C.","General Counsel","Sale under a trading plan",821,111.83,91812,31625,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009985/"],["2026-02-18","2026-02-20","Chen Stephen C.","General Counsel","Sale under a trading plan",480,113.95,54696,31145,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009985/"],["2026-02-18","2026-02-20","Chen Stephen C.","General Counsel","Sale under a trading plan",520,114.55,59567,30625,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009985/"],["2026-02-18","2026-02-20","Chen Stephen C.","General Counsel","Sale under a trading plan",80,115.47,9238,30545,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009985/"],["2026-02-18","2026-02-20","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",1499,112.3,168332,117426,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009984/"],["2026-02-18","2026-02-20","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",166,113.55,18849,117260,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009984/"],["2026-02-18","2026-02-20","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",1520,114.29,173719,115740,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009984/"],["2026-02-18","2026-02-20","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",360,115.29,41504,115380,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009984/"],["2026-02-17","2026-02-20","Meese Robert","Chief Business Officer","Sale outside a trading plan",1000,110.06,110060,122636,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009987/"],["2026-02-17","2026-02-20","Skaruppa Matthew","Chief Financial Officer","Sale under a trading plan",1870,110.06,205812,35617,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009986/"],["2026-02-17","2026-02-20","Chen Stephen C.","General Counsel","Sale under a trading plan",896,110.06,98614,32446,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009985/"],["2026-02-17","2026-02-20","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",1741,110.06,191614,118925,"https://www.sec.gov/Archives/edgar/data/1562088/000162828026009984/"],["2025-11-19","2025-11-20","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",1146,169.57,194324,8926,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053427/"],["2025-11-19","2025-11-20","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",1000,170.55,170549,7926,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053427/"],["2025-11-19","2025-11-20","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",2009,171.5,344534,5917,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053427/"],["2025-11-19","2025-11-20","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",1281,172.39,220831,4636,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053427/"],["2025-11-19","2025-11-20","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",760,173.74,132046,3876,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053427/"],["2025-11-19","2025-11-20","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",3089,174.61,539362,787,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053427/"],["2025-11-19","2025-11-20","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",435,175.46,76324,352,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053427/"],["2025-11-19","2025-11-20","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",280,176.68,49471,72,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053427/"],["2025-11-18","2025-11-19","Chen Stephen C.","General Counsel","Sale under a trading plan",120,173.97,20876,32936,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053186/"],["2025-11-18","2025-11-19","Chen Stephen C.","General Counsel","Sale under a trading plan",594,175.15,104040,32342,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053186/"],["2025-11-18","2025-11-19","Chen Stephen C.","General Counsel","Sale under a trading plan",320,175.94,56300,32022,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053186/"],["2025-11-18","2025-11-19","Chen Stephen C.","General Counsel","Sale under a trading plan",480,177.19,85049,31542,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053186/"],["2025-11-18","2025-11-19","Skaruppa Matthew","Chief Financial Officer","Sale under a trading plan",390,174.04,67874,40156,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053183/"],["2025-11-18","2025-11-19","Skaruppa Matthew","Chief Financial Officer","Sale under a trading plan",793,175,138776,39363,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053183/"],["2025-11-18","2025-11-19","Skaruppa Matthew","Chief Financial Officer","Sale under a trading plan",880,175.73,154643,38483,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053183/"],["2025-11-18","2025-11-19","Skaruppa Matthew","Chief Financial Officer","Sale under a trading plan",796,176.91,140819,37687,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053183/"],["2025-11-18","2025-11-19","Skaruppa Matthew","Chief Financial Officer","Sale under a trading plan",200,177.65,35530,37487,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053183/"],["2025-11-18","2025-11-19","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",160,173.8,27808,113477,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053182/"],["2025-11-18","2025-11-19","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",741,174.97,129652,112736,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053182/"],["2025-11-18","2025-11-19","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",850,175.73,149372,111886,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053182/"],["2025-11-18","2025-11-19","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",560,177,99118,111326,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053182/"],["2025-11-18","2025-11-19","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",160,177.6,28416,111166,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053182/"],["2025-11-17","2025-11-19","Chen Stephen C.","General Counsel","Sale under a trading plan",1282,177.95,228132,33056,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053186/"],["2025-11-17","2025-11-19","Skaruppa Matthew","Chief Financial Officer","Sale under a trading plan",2799,177.95,498082,40546,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053183/"],["2025-11-17","2025-11-19","Glance Natalie","Chief Engineering Officer","Sale under a trading plan",2534,177.95,450925,113637,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053182/"],["2025-11-17","2025-11-18","Meese Robert","Chief Business Officer","Sale outside a trading plan",1444,177.95,256960,123636,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025053009/"],["2025-11-04","2025-11-06","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",744,257.92,191892,9328,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025050203/"],["2025-11-04","2025-11-06","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",936,258.77,242213,8392,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025050203/"],["2025-11-04","2025-11-06","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",560,259.71,145436,7832,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025050203/"],["2025-11-04","2025-11-06","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",165,261.14,43088,7667,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025050203/"],["2025-11-04","2025-11-06","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",1778,261.94,465736,5889,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025050203/"],["2025-11-04","2025-11-06","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",560,262.97,147265,5329,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025050203/"],["2025-11-04","2025-11-06","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",1625,264.06,429098,3704,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025050203/"],["2025-11-04","2025-11-06","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",760,265.02,201412,2944,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025050203/"],["2025-11-04","2025-11-06","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",1727,266.12,459594,1217,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025050203/"],["2025-11-04","2025-11-06","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",1145,266.87,305564,72,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025050203/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",100,305.86,30586,9972,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",600,307.55,184532,9372,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",500,309.06,154532,8872,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",632,309.94,195882,8240,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",1000,311.43,311428,7240,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",1281,312.37,400152,5959,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",500,313.93,156967,5459,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",1100,315.79,347365,4359,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",1600,316.64,506617,2759,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",680,317.68,216025,2079,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",907,318.73,289085,1172,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",300,319.97,95991,872,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",400,321.75,128699,472,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",300,323.09,96927,172,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"],["2025-10-20","2025-10-22","Hacker Severin","Chief Tech Officer, Co-Founder","Sale under a trading plan",100,324.1,32410,72,"https://www.sec.gov/Archives/edgar/data/1562088/000162828025045963/"]]},"planned":{"cols":["filed","who","relationship","shares","value","planned","url"],"rows":[["2026-10-07","LUIS VON AHN ARELLANO","Director, Officer, 10% Stockholder",110046,16301113.98,"2026-10-07","https://www.sec.gov/Archives/edgar/data/1562088/000195004726010101/"],["2026-09-24","LUIS VON AHN ARELLANO","Director, Officer, 10% Stockholder",46682,6814638.36,"2026-09-24","https://www.sec.gov/Archives/edgar/data/1562088/000195004726009799/"],["2026-09-22","LUIS VON AHN ARELLANO","Director, Officer, 10% Stockholder",3614,540003.88,"2026-09-22","https://www.sec.gov/Archives/edgar/data/1562088/000195004726009748/"],["2026-09-21","LUIS VON AHN FOUNDATION","Director, Officer, 10% Stockholder",34992,4965364.8,"2026-09-21","https://www.sec.gov/Archives/edgar/data/1562088/000195004726009714/"],["2026-09-21","LUIS VON AHN ARELLANO","Director, Officer, 10% Stockholder",37366,5302235.4,"2026-09-21","https://www.sec.gov/Archives/edgar/data/1562088/000195004726009712/"],["2026-09-16","LUIS VON AHN FOUNDATION","Director, Officer, 10% Stockholder",19008,2925711.36,"2026-09-16","https://www.sec.gov/Archives/edgar/data/1562088/000195004726009562/"],["2026-09-16","LUIS VON AHN ARELLANO","Director, Officer, 10% Stockholder",28292,4354704.64,"2026-09-16","https://www.sec.gov/Archives/edgar/data/1562088/000195004726009563/"],["2026-09-14","STEPHEN CHEN","Officer",8072,1159784.96,"2026-09-14","https://www.sec.gov/Archives/edgar/data/1562088/000195004726009429/"],["2026-09-08","WILLIAM B. GORDON","Director",20000,3089200,"2026-09-08","https://www.sec.gov/Archives/edgar/data/1562088/000195004726009183/"],["2026-08-18","NATALIE GLANCE","Officer",1539,200316.24,"2026-08-18","https://www.sec.gov/Archives/edgar/data/1562088/000195004726008328/"],["2026-08-17","STEPHEN CHEN","Officer",1024,132230.25,"2026-08-17","https://www.sec.gov/Archives/edgar/data/1562088/000195004726008292/"],["2026-08-17","ROBERT MEESE","Officer",1354,174843.51,"2026-08-17","https://www.sec.gov/Archives/edgar/data/1562088/000195004726008290/"],["2026-08-17","NATALIE GLANCE","Officer",2751,355239.66,"2026-08-17","https://www.sec.gov/Archives/edgar/data/1562088/000195004726008291/"],["2026-05-18","STEPHEN CHEN","Officer",1977,221542.62,"2026-05-18","https://www.sec.gov/Archives/edgar/data/1562088/000195004726004683/"],["2026-05-18","NATALIE GLANCE","Officer",3360,376521.6,"2026-05-18","https://www.sec.gov/Archives/edgar/data/1562088/000195004726004684/"],["2026-05-15","STEPHEN CHEN","Officer",820,91967.26,"2026-05-15","https://www.sec.gov/Archives/edgar/data/1562088/000195004726004648/"],["2026-05-15","ROBERT MEESE","Officer",1420,159260.38,"2026-05-15","https://www.sec.gov/Archives/edgar/data/1562088/000195004726004649/"],["2026-05-15","NATALIE GLANCE","Officer",1929,216347.38,"2026-05-15","https://www.sec.gov/Archives/edgar/data/1562088/000195004726004647/"],["2026-02-18","STEPHEN CHEN","Officer",1901,213064.08,"2026-02-18","https://www.sec.gov/Archives/edgar/data/1562088/000195004726001485/"],["2026-02-18","NATALIE GLANCE","Officer",3545,397323.6,"2026-02-18","https://www.sec.gov/Archives/edgar/data/1562088/000195004726001483/"],["2026-02-18","MATTHEW SKARUPPA","Officer",3986,446750.88,"2026-02-18","https://www.sec.gov/Archives/edgar/data/1562088/000195004726001484/"],["2026-02-17","STEPHEN CHEN","Officer",896,98614.3,"2026-02-17","https://www.sec.gov/Archives/edgar/data/1562088/000195004726001337/"],["2026-02-17","ROBERT MEESE","Officer",1000,110060.6,"2026-02-17","https://www.sec.gov/Archives/edgar/data/1562088/000195004726001335/"],["2026-02-17","NATALIE GLANCE","Officer",1741,191615.5,"2026-02-17","https://www.sec.gov/Archives/edgar/data/1562088/000195004726001399/"],["2026-02-17","MATTHEW SKARUPPA","Officer",1870,205813.32,"2026-02-17","https://www.sec.gov/Archives/edgar/data/1562088/000195004726001403/"],["2025-12-12","THE SEVERIN HACKER FOUNDATIONC/O PHILIP BARTELS","Director, Officer, 10% Stockholder",10000,2009600,"2025-12-12","https://www.sec.gov/Archives/edgar/data/1562088/000195004725010214/"],["2025-11-18","STEPHEN CHEN","Officer",1514,269900.78,"2025-11-18","https://www.sec.gov/Archives/edgar/data/1562088/000195004725009031/"],["2025-11-18","NATALIE GLANCE","Officer",2471,440505.17,"2025-11-18","https://www.sec.gov/Archives/edgar/data/1562088/000195004725009029/"],["2025-11-18","MATTHEW SKARUPPA","Officer",3059,545327.93,"2025-11-18","https://www.sec.gov/Archives/edgar/data/1562088/000195004725009034/"],["2025-11-17","STEPHEN CHEN","Officer",1282,228135.11,"2025-11-17","https://www.sec.gov/Archives/edgar/data/1562088/000195004725008912/"],["2025-11-17","ROBERT MEESE","Officer",1444,256963.41,"2025-11-17","https://www.sec.gov/Archives/edgar/data/1562088/000195004725008940/"],["2025-11-17","NATALIE GLANCE","Officer",2534,450931.64,"2025-11-17","https://www.sec.gov/Archives/edgar/data/1562088/000195004725008934/"],["2025-11-17","MATTHEW SKARUPPA","Officer",2799,498089.05,"2025-11-17","https://www.sec.gov/Archives/edgar/data/1562088/000195004725008910/"]]},"holders":{"cols":["filed","kind","amendment","who","pct","shares","event","url"],"rows":[["2026-10-20","13G",true,"BAILLIE GIFFORD & CO",11.3,4554894,"2026-09-30","https://www.sec.gov/Archives/edgar/data/1562088/000108887526000066/"],["2026-08-12","13G",true,"Von Ahn Luis",8.2,3594120,"2026-06-30","https://www.sec.gov/Archives/edgar/data/1562088/000162828026056405/"],["2026-08-12","13G",false,"AQR Capital Management, LLC",5.8,2332543,"2026-06-30","https://www.sec.gov/Archives/edgar/data/1562088/000116755726000135/"],["2026-07-31","13G",false,"Vanguard Capital Management",5.1,2054884,"2026-06-30","https://www.sec.gov/Archives/edgar/data/1562088/000210011926001381/"],["2026-05-14","13G",true,"Capital World Investors",0,0,"2026-03-31","https://www.sec.gov/Archives/edgar/data/1562088/000142284926000069/"],["2026-05-06","13G",true,"FMR LLC",2.7,1093338.54,"2026-03-31","https://www.sec.gov/Archives/edgar/data/1562088/000031506626001158/"],["2026-03-26","13G",true,"The Vanguard Group",0,0,"2026-03-13","https://www.sec.gov/Archives/edgar/data/1562088/000010290926001183/"],["2025-11-04","13G",true,"BAILLIE GIFFORD & CO",12.4,4900679,"2025-10-31","https://www.sec.gov/Archives/edgar/data/1562088/000108887525000082/"],["2025-11-03","13G",true,"BAILLIE GIFFORD & CO",7.1,2827834,"2025-09-30","https://www.sec.gov/Archives/edgar/data/1562088/000108887525000081/"]]},"short":{"cols":["settlement","short","change_pct","adv","days_to_cover"],"rows":[["2026-09-30",7152857,8.81,1064073,6.72],["2026-09-15",6573989,-13.2,1323285,4.97],["2026-08-31",7573914,6.81,1058025,7.16],["2026-08-14",7091179,-2.38,1574832,4.5],["2026-07-31",7263743,-3.08,1004121,7.23],["2026-07-15",7494489,0.73,982814,7.63],["2026-06-30",7440425,-5.97,1637652,4.54],["2026-06-15",7912936,3.9,1579947,5.01],["2026-05-29",7615582,-2.17,1197098,6.36],["2026-05-15",7784364,2.37,2453941,3.17],["2026-04-30",7604206,-2.93,1594098,4.77],["2026-04-15",7833591,-1.74,1763739,4.44],["2026-03-31",7972506,4.43,1613937,4.94],["2026-03-13",7634055,-11.25,2933867,2.6],["2026-02-27",8601297,-1.47,4339043,1.98],["2026-02-13",8729424,26.46,3146213,2.77],["2026-01-30",6902698,-7.11,2013293,3.43],["2026-01-15",7431337,15.37,2093574,3.55],["2025-12-31",6441438,29.6,1204086,5.35],["2025-12-15",4970210,-8.05,1603642,3.1],["2025-11-28",5405604,0.76,1934934,2.79],["2025-11-14",5364843,16.78,3483471,1.54],["2025-10-31",4594054,19.06,1181405,3.89],["2025-10-15",3858476,2.39,1241566,3.11],["2025-09-30",3768549,9.18,1707483,2.21],["2025-09-15",3451571,4.33,2231264,1.55],["2025-08-29",3308303,9.44,1731918,1.91],["2025-08-15",3022873,23.2,2628717,1.15],["2025-07-31",2453625,1.24,952104,2.58],["2025-07-15",2423692,5.53,832667,2.91],["2025-06-30",2296712,23.97,1095309,2.1],["2025-06-13",1852681,29.19,789916,2.35],["2025-05-30",1434085,20.89,667935,2.15],["2025-05-15",1186232,-6.67,1224366,1],["2025-04-30",1270958,-8.11,796267,1.6],["2025-04-15",1383198,-15.33,900208,1.54],["2025-03-31",1633703,8.1,795641,2.05],["2025-03-14",1511244,22.75,1206824,1.25],["2025-02-28",1231178,-14.38,1233006,1],["2025-02-14",1437905,-0.4,761594,1.89],["2025-01-31",1443633,5.72,589336,2.45],["2025-01-15",1365585,5.44,457730,2.98],["2024-12-31",1295113,5.75,492437,2.63],["2024-12-13",1224693,-9.42,563629,2.17],["2024-11-29",1352009,-5.31,594178,2.28],["2024-11-15",1427864,-18.85,640362,2.23],["2024-10-31",1759569,-5.55,424114,4.15],["2024-10-15",1862907,-8.39,389768,4.78],["2024-09-30",2033517,-5.57,836490,2.43],["2024-09-13",2153364,-3.94,370306,5.82],["2024-08-30",2241662,-0.83,412732,5.43],["2024-08-15",2260383,2.08,840404,2.69],["2024-07-31",2214376,11.23,569805,3.89],["2024-07-15",1990772,-26.03,553727,3.6],["2024-06-28",2691157,-4.55,973155,2.77],["2024-06-14",2819478,4.29,575374,4.9],["2024-05-31",2703507,1.15,855859,3.16],["2024-05-15",2672722,-12.95,1291099,2.07],["2024-04-30",3070342,70.98,1290718,2.38],["2024-04-15",1795764,-7.43,411921,4.36],["2024-03-28",1940001,-5.71,501907,3.87],["2024-03-15",2057389,15.91,779644,2.64],["2024-02-29",1774953,-12.75,1017122,1.75],["2024-02-15",2034307,-8.84,516902,3.94],["2024-01-31",2231468,3.13,608007,3.67],["2024-01-12",2163678,6.23,580310,3.73],["2023-12-29",2036732,-16.59,410693,4.96],["2023-12-15",2441930,1.51,731029,3.34],["2023-11-30",2405620,3.22,621964,3.87],["2023-11-15",2330479,-12.42,1190793,1.96],["2023-10-31",2681832,13.56,677942,3.96],["2023-10-13",2361635,1.35,574400,4.11],["2023-09-29",2330099,6.51,478972,4.86],["2023-09-15",2187611,5.85,493387,4.43],["2023-08-31",2066805,-9.99,426745,4.84],["2023-08-15",2296157,8.72,595107,3.86],["2023-07-31",2111968,-13.45,478707,4.41],["2023-07-14",2440280,6.06,514947,4.74],["2023-06-30",2300750,16.02,586264,3.92],["2023-06-15",1983022,-20.09,615204,3.22],["2023-05-31",2481453,-1.79,653018,3.8],["2023-05-15",2526521,7.78,950391,2.66],["2023-04-28",2344053,0.03,374196,6.26],["2023-04-14",2343245,-1.71,474555,4.94],["2023-03-31",2384069,-4.16,624879,3.82],["2023-03-15",2487450,13.9,1171471,2.12],["2023-02-28",2183900,8.42,466288,4.68],["2023-02-15",2014297,-1.53,503283,4],["2023-01-31",2045547,9.64,339544,6.02],["2023-01-13",1865679,-14.16,371252,5.03],["2022-12-30",2173356,9.24,288217,7.54],["2022-12-15",1989579,5.04,325941,6.1],["2022-11-30",1894091,2.65,379584,4.99],["2022-11-15",1845116,-2.83,390979,4.72],["2022-10-31",1898782,-11.07,380441,4.99],["2022-10-14",2135257,1.48,369269,5.78],["2022-09-30",2104175,-0.77,341481,6.16],["2022-09-15",2120442,10.54,382953,5.54],["2022-08-31",1918294,-14.23,389584,4.92],["2022-08-15",2236479,-17.03,630709,3.55],["2022-07-29",2695499,-6.32,364522,7.39],["2022-07-15",2877441,-15.9,593581,4.85],["2022-06-30",3421561,35.81,1158879,2.95],["2022-06-15",2519427,-11.86,550496,4.58],["2022-05-31",2858420,25.28,589385,4.85],["2022-05-13",2281700,3.84,717259,3.18],["2022-04-29",2197377,14.07,386764,5.68],["2022-04-14",1926379,7.09,515761,3.74],["2022-03-31",1798836,5.69,604762,2.97],["2022-03-15",1702028,-13.18,550373,3.09],["2022-02-28",1960479,-18.88,352206,5.57],["2022-02-15",2416666,10.04,316527,7.63],["2022-01-31",2196120,5.03,385219,5.7],["2022-01-14",2090899,26.47,314238,6.65],["2021-12-31",1653281,10.81,337594,4.9],["2021-12-15",1491932,29.91,576577,2.59],["2021-11-30",1148453,-22.79,622301,1.85],["2021-11-15",1487371,0.22,335290,4.44],["2021-10-29",1484159,12.07,194077,7.65],["2021-10-15",1324335,20.45,216896,6.11],["2021-09-30",1099498,30.09,263926,4.17],["2021-09-15",845188,0.93,272771,3.1],["2021-08-31",837378,99.49,212184,3.95],["2021-08-13",419750,37.04,436401,1],["2021-07-30",306308,100,378716,1]]},"congress":{"cols":["disclosed","tx","member","state","type","amount","owner","url"],"rows":[["2025-09-12","2025-08-13","Lisa McClain","MI09","Sale","$1,001 - $15,000","SP","https://disclosures-clerk.house.gov/public_disc/ptr-pdfs/2025/20030932.pdf"],["2025-08-13","2025-06-24","Lisa McClain","MI09","Sale","$1,001 - $15,000","SP","https://disclosures-clerk.house.gov/public_disc/ptr-pdfs/2025/20030891.pdf"],["2025-08-13","2025-06-17","Lisa McClain","MI09","Purchase","$1,001 - $15,000","SP","https://disclosures-clerk.house.gov/public_disc/ptr-pdfs/2025/20030891.pdf"]]},"events":{"cols":["filed","accepted","form","items","kinds","url","accn","doc","period"],"rows":[["2026-08-19",null,"8-K",["7.01"],["Investor update"],"https://www.sec.gov/Archives/edgar/data/1562088/000162828026057818/","0001628280-26-057818","duol-20260818.htm","2026-08-18"],["2026-08-10",null,"8-K",["5.02","7.01","9.01"],["Leadership change","Investor update"],"https://www.sec.gov/Archives/edgar/data/1562088/000162828026055015/","0001628280-26-055015","duol-20260810.htm","2026-08-10"],["2026-08-05",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000162828026053299/","0001628280-26-053299","duol-20260805.htm","2026-08-05"],["2026-06-05",null,"8-K",["5.07"],["Shareholder vote"],"https://www.sec.gov/Archives/edgar/data/1562088/000162828026041280/","0001628280-26-041280","duol-20260603.htm","2026-06-03"],["2026-05-04",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000162828026029790/","0001628280-26-029790","duol-20260504.htm","2026-05-04"],["2026-02-27",null,"8-K/A",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000162828026012513/","0001628280-26-012513","duol-20260226.htm","2026-02-26"],["2026-02-26",null,"8-K",["2.02","8.01","9.01"],["Results","Other events"],"https://www.sec.gov/Archives/edgar/data/1562088/000162828026012246/","0001628280-26-012246","duol-20260226.htm","2026-02-26"],["2026-01-12",null,"8-K",["2.02","5.02","9.01"],["Results","Leadership change"],"https://www.sec.gov/Archives/edgar/data/1562088/000162828026001730/","0001628280-26-001730","duol-20260108.htm","2026-01-08"],["2025-11-05",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000162828025049514/","0001628280-25-049514","duol-20251105.htm","2025-11-05"],["2025-08-06",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208825000165/","0001562088-25-000165","duol-20250806.htm","2025-08-06"],["2025-06-13",null,"8-K",["5.07"],["Shareholder vote"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208825000129/","0001562088-25-000129","duol-20250611.htm","2025-06-11"],["2025-05-01",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208825000098/","0001562088-25-000098","duol-20250501.htm","2025-05-01"],["2025-02-27",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208825000039/","0001562088-25-000039","duol-20250227.htm","2025-02-27"],["2024-12-09",null,"8-K",["5.02","7.01","9.01"],["Leadership change","Investor update"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208824000276/","0001562088-24-000276","duol-20241205.htm","2024-12-05"],["2024-11-06",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208824000248/","0001562088-24-000248","duol-20241106.htm","2024-11-06"],["2024-08-07",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208824000203/","0001562088-24-000203","duol-20240807.htm","2024-08-07"],["2024-06-21",null,"8-K",["5.02"],["Leadership change"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208824000172/","0001562088-24-000172","duol-20240614.htm","2024-06-14"],["2024-06-18",null,"8-K",["5.07"],["Shareholder vote"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208824000168/","0001562088-24-000168","duol-20240612.htm","2024-06-12"],["2024-05-10",null,"8-K/A",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208824000117/","0001562088-24-000117","duol-20240508.htm","2024-05-08"],["2024-05-08",null,"8-K",["2.02","5.02","9.01"],["Results","Leadership change"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208824000110/","0001562088-24-000110","duol-20240508.htm","2024-05-08"],["2024-03-06",null,"8-K",["1.01","2.03"],["Material agreement","New debt"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208824000058/","0001562088-24-000058","duol-20240304.htm","2024-03-04"],["2024-02-28",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208824000048/","0001562088-24-000048","duol-20240228.htm","2024-02-28"],["2023-12-19",null,"8-K",["1.01","2.03"],["Material agreement","New debt"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208823000254/","0001562088-23-000254","duol-20231218.htm","2023-12-18"],["2023-12-08",null,"8-K",["5.03","9.01"],["Bylaws or fiscal year change"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208823000247/","0001562088-23-000247","duol-20231207.htm","2023-12-07"],["2023-11-08",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208823000219/","0001562088-23-000219","duol-20231108.htm","2023-11-08"],["2023-08-08",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208823000173/","0001562088-23-000173","duol-20230808.htm","2023-08-08"],["2023-06-22",null,"8-K",["5.07"],["Shareholder vote"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208823000167/","0001562088-23-000167","duol-20230615.htm","2023-06-15"],["2023-05-09",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208823000101/","0001562088-23-000101","duol-20230509.htm","2023-05-09"],["2023-02-28",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208823000050/","0001562088-23-000050","duol-20230228.htm","2023-02-28"],["2022-11-10",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208822000163/","0001562088-22-000163","duol-20221110.htm","2022-11-10"],["2022-08-04",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208822000133/","0001562088-22-000133","duol-20220804.htm","2022-08-04"],["2022-06-13",null,"8-K",["5.07"],["Shareholder vote"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208822000093/","0001562088-22-000093","duol-20220609.htm","2022-06-09"],["2022-05-12",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208822000058/","0001562088-22-000058","duol-20220512.htm","2022-05-12"],["2022-03-03",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208822000033/","0001562088-22-000033","duol-20220303.htm","2022-03-03"],["2021-12-14",null,"8-K",["5.02","7.01","9.01"],["Leadership change","Investor update"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208821000053/","0001562088-21-000053","duol-20211208.htm","2021-12-08"],["2021-11-22",null,"8-K",["1.01","2.03"],["Material agreement","New debt"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208821000046/","0001562088-21-000046","duol-20211116.htm","2021-11-16"],["2021-11-10",null,"8-K",["2.02","8.01","9.01"],["Results","Other events"],"https://www.sec.gov/Archives/edgar/data/1562088/000156208821000021/","0001562088-21-000021","duol-20211110.htm","2021-11-10"],["2021-08-11",null,"8-K",["2.02","9.01"],["Results"],"https://www.sec.gov/Archives/edgar/data/1562088/000162828021016602/","0001628280-21-016602","duol-20210811.htm","2021-08-11"],["2021-07-30",null,"8-K",["5.03","8.01","9.01"],["Bylaws or fiscal year change","Other events"],"https://www.sec.gov/Archives/edgar/data/1562088/000162828021015040/","0001628280-21-015040","duolingo-8xk.htm","2021-07-30"]]},"filings":{"cols":["filed","accepted","form","period","url","accn","doc","items","kinds"],"rows":[["2026-08-19",null,"8-K","2026-08-18","https://www.sec.gov/Archives/edgar/data/1562088/000162828026057818/","0001628280-26-057818","duol-20260818.htm",["7.01"],["Investor update"]],["2026-08-10",null,"8-K","2026-08-10","https://www.sec.gov/Archives/edgar/data/1562088/000162828026055015/","0001628280-26-055015","duol-20260810.htm",["5.02","7.01","9.01"],["Leadership change","Investor update"]],["2026-08-06",null,"10-Q","2026-06-30","https://www.sec.gov/Archives/edgar/data/1562088/000162828026053603/","0001628280-26-053603","duol-20260630.htm",[],null],["2026-08-05",null,"8-K","2026-08-05","https://www.sec.gov/Archives/edgar/data/1562088/000162828026053299/","0001628280-26-053299","duol-20260805.htm",["2.02","9.01"],["Results"]],["2026-06-05",null,"8-K","2026-06-03","https://www.sec.gov/Archives/edgar/data/1562088/000162828026041280/","0001628280-26-041280","duol-20260603.htm",["5.07"],["Shareholder vote"]],["2026-05-05",null,"10-Q","2026-03-31","https://www.sec.gov/Archives/edgar/data/1562088/000162828026029976/","0001628280-26-029976","duol-20260331.htm",[],null],["2026-05-04",null,"8-K","2026-05-04","https://www.sec.gov/Archives/edgar/data/1562088/000162828026029790/","0001628280-26-029790","duol-20260504.htm",["2.02","9.01"],["Results"]],["2026-04-17",null,"ARS","2025-12-31","https://www.sec.gov/Archives/edgar/data/1562088/000162828026025737/","0001628280-26-025737","duolingodecember312025an.htm",[],null],["2026-04-17",null,"DEFA14A","","https://www.sec.gov/Archives/edgar/data/1562088/000162828026025734/","0001628280-26-025734","duol-2026defa14a.htm",[],null],["2026-04-17",null,"DEF 14A","2026-04-17","https://www.sec.gov/Archives/edgar/data/1562088/000162828026025728/","0001628280-26-025728","duol-20260417.htm",[],null],["2026-02-27",null,"S-8","","https://www.sec.gov/Archives/edgar/data/1562088/000162828026012499/","0001628280-26-012499","a2026duol-formsx8evergreen.htm",[],null],["2026-02-27",null,"8-K/A","2026-02-26","https://www.sec.gov/Archives/edgar/data/1562088/000162828026012513/","0001628280-26-012513","duol-20260226.htm",["2.02","9.01"],["Results"]],["2026-02-27",null,"10-K","2025-12-31","https://www.sec.gov/Archives/edgar/data/1562088/000162828026012494/","0001628280-26-012494","duol-20251231.htm",[],null],["2026-02-26",null,"8-K","2026-02-26","https://www.sec.gov/Archives/edgar/data/1562088/000162828026012246/","0001628280-26-012246","duol-20260226.htm",["2.02","8.01","9.01"],["Results","Other events"]],["2026-01-12",null,"8-K","2026-01-08","https://www.sec.gov/Archives/edgar/data/1562088/000162828026001730/","0001628280-26-001730","duol-20260108.htm",["2.02","5.02","9.01"],["Results","Leadership change"]],["2025-11-06",null,"10-Q","2025-09-30","https://www.sec.gov/Archives/edgar/data/1562088/000162828025049743/","0001628280-25-049743","duol-20250930.htm",[],null],["2025-11-05",null,"8-K","2025-11-05","https://www.sec.gov/Archives/edgar/data/1562088/000162828025049514/","0001628280-25-049514","duol-20251105.htm",["2.02","9.01"],["Results"]],["2025-08-07",null,"10-Q","2025-06-30","https://www.sec.gov/Archives/edgar/data/1562088/000156208825000168/","0001562088-25-000168","duol-20250630.htm",[],null],["2025-08-06",null,"8-K","2025-08-06","https://www.sec.gov/Archives/edgar/data/1562088/000156208825000165/","0001562088-25-000165","duol-20250806.htm",["2.02","9.01"],["Results"]],["2025-06-13",null,"8-K","2025-06-11","https://www.sec.gov/Archives/edgar/data/1562088/000156208825000129/","0001562088-25-000129","duol-20250611.htm",["5.07"],["Shareholder vote"]],["2025-05-02",null,"10-Q","2025-03-31","https://www.sec.gov/Archives/edgar/data/1562088/000156208825000100/","0001562088-25-000100","duol-20250331.htm",[],null],["2025-05-01",null,"8-K","2025-05-01","https://www.sec.gov/Archives/edgar/data/1562088/000156208825000098/","0001562088-25-000098","duol-20250501.htm",["2.02","9.01"],["Results"]],["2025-04-25",null,"ARS","2024-12-31","https://www.sec.gov/Archives/edgar/data/1562088/000156208825000090/","0001562088-25-000090","duolingodecember312024an.htm",[],null],["2025-04-25",null,"DEFA14A","","https://www.sec.gov/Archives/edgar/data/1562088/000156208825000088/","0001562088-25-000088","duol-2025defa14a.htm",[],null],["2025-04-25",null,"DEF 14A","2024-12-31","https://www.sec.gov/Archives/edgar/data/1562088/000156208825000086/","0001562088-25-000086","duol-20250425.htm",[],null],["2025-02-28",null,"S-8","","https://www.sec.gov/Archives/edgar/data/1562088/000156208825000043/","0001562088-25-000043","a2025duol-formsx8evergreen.htm",[],null],["2025-02-28",null,"10-K","2024-12-31","https://www.sec.gov/Archives/edgar/data/1562088/000156208825000042/","0001562088-25-000042","duol-20241231.htm",[],null],["2025-02-27",null,"8-K","2025-02-27","https://www.sec.gov/Archives/edgar/data/1562088/000156208825000039/","0001562088-25-000039","duol-20250227.htm",["2.02","9.01"],["Results"]],["2024-12-16",null,"10-Q/A","2024-09-30","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000289/","0001562088-24-000289","duol-20240930.htm",[],null],["2024-12-09",null,"8-K","2024-12-05","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000276/","0001562088-24-000276","duol-20241205.htm",["5.02","7.01","9.01"],["Leadership change","Investor update"]],["2024-11-07",null,"10-Q","2024-09-30","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000250/","0001562088-24-000250","duol-20240930.htm",[],null],["2024-11-06",null,"8-K","2024-11-06","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000248/","0001562088-24-000248","duol-20241106.htm",["2.02","9.01"],["Results"]],["2024-08-08",null,"10-Q","2024-06-30","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000207/","0001562088-24-000207","duol-20240630.htm",[],null],["2024-08-07",null,"8-K","2024-08-07","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000203/","0001562088-24-000203","duol-20240807.htm",["2.02","9.01"],["Results"]],["2024-06-21",null,"8-K","2024-06-14","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000172/","0001562088-24-000172","duol-20240614.htm",["5.02"],["Leadership change"]],["2024-06-18",null,"8-K","2024-06-12","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000168/","0001562088-24-000168","duol-20240612.htm",["5.07"],["Shareholder vote"]],["2024-05-23",null,"DEFA14A","","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000140/","0001562088-24-000140","duol-2024proxystatementdir.htm",[],null],["2024-05-10",null,"8-K/A","2024-05-08","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000117/","0001562088-24-000117","duol-20240508.htm",["2.02","9.01"],["Results"]],["2024-05-09",null,"10-Q","2024-03-31","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000113/","0001562088-24-000113","duol-20240331.htm",[],null],["2024-05-08",null,"8-K","2024-05-08","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000110/","0001562088-24-000110","duol-20240508.htm",["2.02","5.02","9.01"],["Results","Leadership change"]],["2024-04-26",null,"ARS","2023-12-31","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000093/","0001562088-24-000093","duolingodecember312023an.htm",[],null],["2024-04-25",null,"DEFA14A","","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000089/","0001562088-24-000089","duol-2024defa14a.htm",[],null],["2024-04-25",null,"DEF 14A","2023-12-31","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000088/","0001562088-24-000088","duol-20240425.htm",[],null],["2024-03-06",null,"8-K","2024-03-04","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000058/","0001562088-24-000058","duol-20240304.htm",["1.01","2.03"],["Material agreement","New debt"]],["2024-02-29",null,"S-8","","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000051/","0001562088-24-000051","a2024duol-formsx8evergreen.htm",[],null],["2024-02-29",null,"10-K","2023-12-31","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000050/","0001562088-24-000050","duol-20231231.htm",[],null],["2024-02-28",null,"8-K","2024-02-28","https://www.sec.gov/Archives/edgar/data/1562088/000156208824000048/","0001562088-24-000048","duol-20240228.htm",["2.02","9.01"],["Results"]],["2023-12-19",null,"8-K","2023-12-18","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000254/","0001562088-23-000254","duol-20231218.htm",["1.01","2.03"],["Material agreement","New debt"]],["2023-12-08",null,"8-K","2023-12-07","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000247/","0001562088-23-000247","duol-20231207.htm",["5.03","9.01"],["Bylaws or fiscal year change"]],["2023-11-09",null,"10-Q","2023-09-30","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000221/","0001562088-23-000221","duol-20230930.htm",[],null],["2023-11-08",null,"8-K","2023-11-08","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000219/","0001562088-23-000219","duol-20231108.htm",["2.02","9.01"],["Results"]],["2023-08-09",null,"10-Q","2023-06-30","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000175/","0001562088-23-000175","duol-20230630.htm",[],null],["2023-08-08",null,"8-K","2023-08-08","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000173/","0001562088-23-000173","duol-20230808.htm",["2.02","9.01"],["Results"]],["2023-06-22",null,"8-K","2023-06-15","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000167/","0001562088-23-000167","duol-20230615.htm",["5.07"],["Shareholder vote"]],["2023-05-10",null,"10-Q","2023-03-31","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000103/","0001562088-23-000103","duol-20230331.htm",[],null],["2023-05-09",null,"8-K","2023-05-09","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000101/","0001562088-23-000101","duol-20230509.htm",["2.02","9.01"],["Results"]],["2023-04-28",null,"ARS","2022-12-31","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000092/","0001562088-23-000092","duolingodecember312022an.htm",[],null],["2023-04-28",null,"DEFA14A","","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000091/","0001562088-23-000091","duol-2023defa14a.htm",[],null],["2023-04-28",null,"DEF 14A","","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000088/","0001562088-23-000088","duol-20230428.htm",[],null],["2023-03-01",null,"S-8","","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000054/","0001562088-23-000054","a2023duol-formsx8evergreen.htm",[],null],["2023-03-01",null,"10-K","2022-12-31","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000052/","0001562088-23-000052","duol-20221231.htm",[],null],["2023-02-28",null,"8-K","2023-02-28","https://www.sec.gov/Archives/edgar/data/1562088/000156208823000050/","0001562088-23-000050","duol-20230228.htm",["2.02","9.01"],["Results"]],["2022-11-14",null,"10-Q","2022-09-30","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000165/","0001562088-22-000165","duol-20220930.htm",[],null],["2022-11-10",null,"8-K","2022-11-10","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000163/","0001562088-22-000163","duol-20221110.htm",["2.02","9.01"],["Results"]],["2022-08-05",null,"10-Q","2022-06-30","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000135/","0001562088-22-000135","duol-20220630.htm",[],null],["2022-08-04",null,"8-K","2022-08-04","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000133/","0001562088-22-000133","duol-20220804.htm",["2.02","9.01"],["Results"]],["2022-06-13",null,"8-K","2022-06-09","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000093/","0001562088-22-000093","duol-20220609.htm",["5.07"],["Shareholder vote"]],["2022-05-13",null,"10-Q","2022-03-31","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000061/","0001562088-22-000061","duol-20220331.htm",[],null],["2022-05-12",null,"8-K","2022-05-12","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000058/","0001562088-22-000058","duol-20220512.htm",["2.02","9.01"],["Results"]],["2022-04-22",null,"DEFA14A","","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000051/","0001562088-22-000051","duol-2022defa14a.htm",[],null],["2022-04-22",null,"DEF 14A","2022-06-09","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000048/","0001562088-22-000048","duol-2022proxystatement.htm",[],null],["2022-03-04",null,"S-8","","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000041/","0001562088-22-000041","duol-formsx8evergreenshares.htm",[],null],["2022-03-04",null,"10-K","2021-12-31","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000039/","0001562088-22-000039","duol-20211231.htm",[],null],["2022-03-03",null,"8-K","2022-03-03","https://www.sec.gov/Archives/edgar/data/1562088/000156208822000033/","0001562088-22-000033","duol-20220303.htm",["2.02","9.01"],["Results"]],["2021-12-14",null,"8-K","2021-12-08","https://www.sec.gov/Archives/edgar/data/1562088/000156208821000053/","0001562088-21-000053","duol-20211208.htm",["5.02","7.01","9.01"],["Leadership change","Investor update"]],["2021-11-22",null,"8-K","2021-11-16","https://www.sec.gov/Archives/edgar/data/1562088/000156208821000046/","0001562088-21-000046","duol-20211116.htm",["1.01","2.03"],["Material agreement","New debt"]],["2021-11-12",null,"10-Q","2021-09-30","https://www.sec.gov/Archives/edgar/data/1562088/000156208821000026/","0001562088-21-000026","duol-20210930.htm",[],null],["2021-11-10",null,"8-K","2021-11-10","https://www.sec.gov/Archives/edgar/data/1562088/000156208821000021/","0001562088-21-000021","duol-20211110.htm",["2.02","8.01","9.01"],["Results","Other events"]],["2021-08-12",null,"10-Q","2021-06-30","https://www.sec.gov/Archives/edgar/data/1562088/000162828021016861/","0001628280-21-016861","duol-20210630.htm",[],null],["2021-08-11",null,"8-K","2021-08-11","https://www.sec.gov/Archives/edgar/data/1562088/000162828021016602/","0001628280-21-016602","duol-20210811.htm",["2.02","9.01"],["Results"]],["2021-07-30",null,"8-K","2021-07-30","https://www.sec.gov/Archives/edgar/data/1562088/000162828021015040/","0001628280-21-015040","duolingo-8xk.htm",["5.03","8.01","9.01"],["Bylaws or fiscal year change","Other events"]],["2021-07-28",null,"S-8","","https://www.sec.gov/Archives/edgar/data/1562088/000162828021014611/","0001628280-21-014611","duolingo-sx8equityplans.htm",[],null],["2021-07-28",null,"S-8","","https://www.sec.gov/Archives/edgar/data/1562088/000162828021014606/","0001628280-21-014606","forms-8resale.htm",[],null],["2021-07-27",null,"EFFECT","","https://www.sec.gov/Archives/edgar/data/1562088/999999999521002935/","9999999995-21-002935","xslEFFECTX01/primary_doc.xml",["S-1","2021-07-27 16:00:00"],null],["2021-07-27",null,"CERT","","https://www.sec.gov/Archives/edgar/data/1562088/000135445721000853/","0001354457-21-000853","8A_cert_DUOL.pdf",[],null],["2021-07-26",null,"S-1/A","","https://www.sec.gov/Archives/edgar/data/1562088/000162828021014402/","0001628280-21-014402","duolingos-1a2upsize_new.htm",[],null],["2021-07-23",null,"8-A12B","","https://www.sec.gov/Archives/edgar/data/1562088/000162828021014340/","0001628280-21-014340","duolingo-form8xa.htm",[],null],["2021-07-23",null,"CORRESP","","https://www.sec.gov/Archives/edgar/data/1562088/000162828021014339/","0001628280-21-014339","filename1.htm",[],null],["2021-07-23",null,"CORRESP","","https://www.sec.gov/Archives/edgar/data/1562088/000162828021014338/","0001628280-21-014338","filename1.htm",[],null],["2021-07-19",null,"CORRESP","","https://www.sec.gov/Archives/edgar/data/1562088/000162828021013984/","0001628280-21-013984","filename1.htm",[],null],["2021-07-19",null,"S-1/A","","https://www.sec.gov/Archives/edgar/data/1562088/000162828021013980/","0001628280-21-013980","duolingos-1a1.htm",[],null],["2021-07-14",null,"UPLOAD","","https://www.sec.gov/Archives/edgar/data/1562088/000000000021008667/","0000000000-21-008667","filename1.pdf",[],null],["2021-06-30",null,"CORRESP","","https://www.sec.gov/Archives/edgar/data/1562088/000162828021013242/","0001628280-21-013242","filename1.htm",[],null],["2021-06-28",null,"CORRESP","","https://www.sec.gov/Archives/edgar/data/1562088/000162828021013070/","0001628280-21-013070","filename1.htm",[],null],["2021-06-28",null,"S-1","","https://www.sec.gov/Archives/edgar/data/1562088/000162828021013065/","0001628280-21-013065","duolingos-1.htm",[],null],["2021-06-24",null,"UPLOAD","","https://www.sec.gov/Archives/edgar/data/1562088/000000000021007812/","0000000000-21-007812","filename1.pdf",[],null],["2021-06-07",null,"DRSLTR","","https://www.sec.gov/Archives/edgar/data/1562088/000162827921000345/","0001628279-21-000345","filename1.htm",[],null],["2021-06-07",null,"DRS/A","","https://www.sec.gov/Archives/edgar/data/1562088/000162827921000341/","0001628279-21-000341","filename1.htm",[],null],["2021-05-27",null,"UPLOAD","","https://www.sec.gov/Archives/edgar/data/1562088/000000000021006698/","0000000000-21-006698","filename1.pdf",[],null],["2021-04-30",null,"DRS","","https://www.sec.gov/Archives/edgar/data/1562088/000162827921000254/","0001628279-21-000254","filename1.htm",[],null],["2020-11-19",null,"D","","https://www.sec.gov/Archives/edgar/data/1562088/000156761920020085/","0001567619-20-020085","xslFormDX01/primary_doc.xml",["06b"],null],["2020-04-14",null,"D","","https://www.sec.gov/Archives/edgar/data/1562088/000156761920007913/","0001567619-20-007913","xslFormDX01/primary_doc.xml",["06b"],null],["2020-01-07",null,"D","","https://www.sec.gov/Archives/edgar/data/1562088/000156761920000688/","0001567619-20-000688","xslFormDX01/primary_doc.xml",["06b"],null],["2017-09-12",null,"D","","https://www.sec.gov/Archives/edgar/data/1562088/000114036117035174/","0001140361-17-035174","xslFormDX01/primary_doc.xml",["06b"],null],["2012-11-13",null,"D","","https://www.sec.gov/Archives/edgar/data/1562088/000156208812000001/","0001562088-12-000001","xslFormDX01/primary_doc.xml",["06"],null]]},"counts":{"insider":109,"planned":33,"holders":9,"short":125,"congress":3,"events":39,"filings":105,"years":6},"by_year":{"filings":{"2012":1,"2017":1,"2020":3,"2021":26,"2022":12,"2023":15,"2024":19,"2025":13,"2026":15},"events":{"2021":5,"2022":5,"2023":7,"2024":9,"2025":5,"2026":8}}}