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ATO SEC Filings

SEC filings for ATO. Annual and quarterly reports, 8-K events,
Form 4 insider filings and 13D/G stake disclosures.

All10-K10-Q8-KForm 413D/GLast 12 months
FormFiledAccession
SC 13G/AamendedWELLINGTON MANAGEMENT GROUP LLPAug 13, 2026EDGAR
SC 13G/AamendedWellington Group Holdings LLPAug 13, 2026EDGAR
SC 13G/AamendedWellington Investment Advisors Holdings LLPAug 13, 2026EDGAR
SC 13G/AamendedWellington Management Company LLPAug 13, 2026EDGAR
4WARE WILLIAM JAMESAug 12, 2026EDGAR
8-KAug 10, 2026EDGAR
10-QAug 5, 2026EDGAR
8-KAug 5, 2026EDGAR
SC 13G/AamendedBlackRock, Inc.Jul 27, 2026EDGAR
4GARZA RAFAEL GJul 2, 2026EDGAR
8-KJun 18, 2026EDGAR
8-KJun 18, 2026EDGAR
SC 13G/AamendedCapital International InvestorsMay 14, 2026EDGAR
8-KMay 6, 2026EDGAR
10-QMay 6, 2026EDGAR
4ROBBINS J MATTSR VP, HUMAN RESOURCESMay 4, 2026EDGAR
4MCDILL JOHN SSR VP, UTILITY OPERATIONSMay 4, 2026EDGAR
4HARTSFIELD KAREN ESenior AdvisorMay 4, 2026EDGAR
4Forsythe Christopher TSR VICE PRESIDENT & CFOMay 4, 2026EDGAR
4FAULK MICHELLEVice President & ControllerMay 4, 2026EDGAR
4AKERS JOHN KPRESIDENT & CEOMay 4, 2026EDGAR
SC 13GVanguard Capital ManagementApr 29, 2026EDGAR
SC 13GVanguard Portfolio ManagementApr 28, 2026EDGAR
4GARZA RAFAEL GApr 2, 2026EDGAR
8-KMar 30, 2026EDGAR
SC 13G/AamendedVANGUARD GROUP INCMar 26, 2026EDGAR
4COMPTON KELLY HMar 10, 2026EDGAR
4COCKLIN KIM RMar 10, 2026EDGAR
4Ale John C.Mar 10, 2026EDGAR
8-KFeb 10, 2026EDGAR
4Sampson Richard AFeb 5, 2026EDGAR
10-QFeb 3, 2026EDGAR
8-KFeb 3, 2026EDGAR
4BATEMAN JESSICA WALKERSr VP, Gen Counsel, Corp Sec'yJan 5, 2026EDGAR
4GARZA RAFAEL GJan 5, 2026EDGAR
4COMPTON KELLY HDec 18, 2025EDGAR
4ROBBINS J MATTSR VP, HUMAN RESOURCESDec 12, 2025EDGAR
SC 13G/AamendedBlackRock, Inc.Dec 4, 2025EDGAR
4DONOHUE SEANDec 4, 2025EDGAR
10-KNov 14, 2025EDGAR
4AKERS JOHN KPRESIDENT & CEONov 5, 2025EDGAR
4Forsythe Christopher TSR VICE PRESIDENT & CFONov 5, 2025EDGAR
4FAULK MICHELLEVice President & ControllerNov 5, 2025EDGAR
4HARTSFIELD KAREN ESenior AdvisorNov 5, 2025EDGAR
4MCDILL JOHN SSR VP, UTILITY OPERATIONSNov 5, 2025EDGAR
4ROBBINS J MATTSR VP, HUMAN RESOURCESNov 5, 2025EDGAR
8-KNov 5, 2025EDGAR
4GARZA RAFAEL GOct 2, 2025EDGAR
8-KOct 1, 2025EDGAR
8-KOct 1, 2025EDGAR

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Source: SEC EDGAR.