Company facts
- Industry
- Electric Services
- Headquarters
- Boston, Massachusetts
- Most recent report
- 10-Q, filed Nov 6, 2026
- Incorporated
- Massachusetts
- Filings on record
- 406 filings
- On EDGAR
- CIK 13372
- Fiscal year ends
- December
- Filer status
- N/A
Financials 8 of 136
News 8 of 128
Prospectuses and Registrations 8 of 91
- 424B5 Prospectus supplement for an offering May 12, 2026
- FWP Free writing prospectus May 11, 2026
- FWP Free writing prospectus May 11, 2026
- 424B3 Prospectus supplement for an offering May 11, 2026
- 424B5 Prospectus supplement for an offering Oct 16, 2025
- FWP Free writing prospectus Oct 15, 2025
- 424B3 Prospectus supplement for an offering Oct 15, 2025
- S-3ASR Automatic shelf registration Apr 3, 2025
Proxies 8
- DEF 14A Proxy statement for a shareholder vote Mar 30, 1998
- DEFA14A Extra proxy material Apr 29, 1997
- DEFA14A Extra proxy material Apr 22, 1997
- DEF 14A Proxy statement for a shareholder vote Apr 3, 1997
- DEF 14A Proxy statement for a shareholder vote Mar 28, 1996
- DEF 14A Proxy statement for a shareholder vote Mar 24, 1995
- DEF 14A Proxy statement for a shareholder vote Mar 17, 1994
- PRE 14A Preliminary proxy statement Feb 16, 1994
Ownership 8 of 9
- SC 13G/A Large holder reported a passive stake, amended Feb 12, 2024
- SC 13G/A Large holder reported a passive stake, amended Feb 9, 2023
- SC 13G/A Large holder reported a passive stake, amended Feb 14, 2022
- SC 13G/A Large holder reported a passive stake, amended Feb 18, 2021
- SC 13G/A Large holder reported a passive stake, amended Feb 12, 2021
- SC 13G/A Large holder reported a passive stake, amended Feb 12, 2020
- SC 13G/A Large holder reported a passive stake, amended Feb 10, 1999
- SC 13G Large holder reported a passive stake Feb 12, 1998
Other 8 of 34
- POSASR Feb 20, 2026
- 15-12G Sep 28, 2023
- ARS Annual report sent to shareholders Mar 24, 2023
- ARS Annual report sent to shareholders Mar 16, 2015
- UPLOAD Comment letter from SEC staff Jun 9, 2014
- UPLOAD Comment letter from SEC staff May 13, 2014
- ARS Annual report sent to shareholders Mar 24, 2014
- UPLOAD Comment letter from SEC staff Jun 6, 2013
Everything here comes from Nstar Electric Co's own filings on SEC EDGAR. The filing list is rechecked every hour.