Headquarters state · NH

Public companies headquartered in New Hampshire

8 of the companies OpenFilings tracks list a business address in New Hampshire. The most common cities are Hampton (2), Portsmouth (1), Manchester (1), Hanover (1), Salem (1), Merrimack (1), Rochester (1).

SEC EDGAR snapshot updated Oct 27, 2026, 11:27 PM EDT. Not investment advice.

Companies based in New Hampshire

Public companies headquartered in New Hampshire
#CompanyIndustry (SIC)Latest filingRevenue (latest FY)
437IRM IRON MOUNTAIN INCReal Estate Investment TrustsOct 8, 2026$6.9BFY2025
1205ALGM ALLEGRO MICROSYSTEMS, INC.Semiconductors & Related DevicesOct 7, 2026$890.1MFY2026
1294WTM WHITE MOUNTAINS INSURANCE GROUP LTDFire, Marine & Casualty InsuranceAug 31, 2026$3.7BFY2025
1490PLNT Planet Fitness, Inc.Services-Membership Sports & Recreation ClubsOct 5, 2026$1.3BFY2025
1709SXI STANDEX INTERNATIONAL CORP/DE/Refrigeration & Service Industry MachineryOct 26, 2026$891.6MFY2026
1899CNXN PC CONNECTION INCWholesale-Computers & Peripheral Equipment & SoftwareOct 22, 2026$2.9BFY2025
2051AIN ALBANY INTERNATIONAL CORP /DE/Broadwoven Fabric Mills, Man Made Fiber & SilkSep 3, 2026$1.2BFY2025
2432UTL UNITIL CORPElectric & Other Services CombinedOct 26, 2026$536.0MFY2025

Ranked by position in the SEC company ticker list (roughly by market value). The headquarters state comes from the business address in EDGAR and can differ from the state of incorporation.

Largest industries in New Hampshire

Latest reports from New Hampshire companies

Recent filings by companies headquartered in New Hampshire
FiledCompanyFormWhat it isOriginal
Oct 26, 2026SXI STANDEX INTERNATIONAL CORP/DE/8-KDirector or officer change· period Oct 21, 2026Document · Index
Oct 26, 2026UTL UNITIL CORP8-KMaterial agreement; Agreement terminated; Acquisition or disposition completed· period Oct 21, 2026Document · Index
Oct 23, 2026SXI STANDEX INTERNATIONAL CORP/DE/8-KShareholder vote results· period Oct 20, 2026Document · Index
Oct 19, 2026SXI STANDEX INTERNATIONAL CORP/DE/8-KDirector or officer change· period Oct 13, 2026Document · Index
Oct 19, 2026UTL UNITIL CORP8-KMaterial agreement; New financial obligation· period Oct 14, 2026Document · Index
Oct 14, 2026CNXN PC CONNECTION INC8-KDirector or officer change· period Oct 8, 2026Document · Index
Sep 29, 2026UTL UNITIL CORP8-KMaterial agreement; New financial obligation· period Sep 24, 2026Document · Index
Sep 4, 2026SXI STANDEX INTERNATIONAL CORP/DE/DEF 14ADefinitive proxy statement· period Oct 20, 2026Document · Index
Sep 1, 2026AIN ALBANY INTERNATIONAL CORP /DE/8-KResults of operations; Regulation FD disclosure· period Sep 1, 2026Document · Index
Aug 31, 2026AIN ALBANY INTERNATIONAL CORP /DE/8-KDirector or officer change; Regulation FD disclosure· period Aug 31, 2026Document · Index
Aug 27, 2026WTM WHITE MOUNTAINS INSURANCE GROUP LTD8-KDirector or officer change· period Aug 26, 2026Document · Index
Aug 14, 2026SXI STANDEX INTERNATIONAL CORP/DE/10-KAnnual report· period Jun 30, 2026Document · Index
Aug 7, 2026ALGM ALLEGRO MICROSYSTEMS, INC.8-KShareholder vote results· period Aug 5, 2026Document · Index
Aug 6, 2026PLNT Planet Fitness, Inc.10-QQuarterly report· period Jun 30, 2026Document · Index
Aug 6, 2026PLNT Planet Fitness, Inc.8-KResults of operations· period Aug 6, 2026Document · Index
Aug 6, 2026WTM WHITE MOUNTAINS INSURANCE GROUP LTD10-QQuarterly report· period Jun 30, 2026Document · Index
Aug 6, 2026WTM WHITE MOUNTAINS INSURANCE GROUP LTD8-KResults of operations· period Aug 6, 2026Document · Index
Aug 5, 2026IRM IRON MOUNTAIN INC10-QQuarterly report· period Jun 30, 2026Document · Index
Aug 5, 2026IRM IRON MOUNTAIN INC8-KResults of operations· period Aug 5, 2026Document · Index
Aug 4, 2026AIN ALBANY INTERNATIONAL CORP /DE/10-QQuarterly report· period Jun 30, 2026Document · Index
Aug 4, 2026AIN ALBANY INTERNATIONAL CORP /DE/8-KResults of operations· period Aug 4, 2026Document · Index
Aug 3, 2026UTL UNITIL CORP10-QQuarterly report· period Jun 30, 2026Document · Index
Jul 31, 2026ALGM ALLEGRO MICROSYSTEMS, INC.10-QQuarterly report· period Jun 26, 2026Document · Index
Jul 30, 2026ALGM ALLEGRO MICROSYSTEMS, INC.8-KResults of operations· period Jul 30, 2026Document · Index
Jul 29, 2026CNXN PC CONNECTION INC10-QQuarterly report· period Jun 30, 2026Document · Index

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Source

  • U.S. Securities and Exchange Commission, EDGAR company submissions (business address) and XBRL company facts. The SEC does not endorse OpenFilings.