SIERRA PACIFIC POWER COSEC Filings
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All SEC filings by SIERRA PACIFIC POWER CO — annual and quarterly reports, current reports, registrations, proxies and ownership forms, updated in real time.
Financials
| 10-Q | Quarterly report | View Diff | Aug 7, 2026 | |
| 10-Q | Quarterly report | View Diff | May 1, 2026 | |
| 10-K | Annual report | View Diff | Feb 27, 2026 | |
| 10-Q | Quarterly report | View Diff | Oct 31, 2025 | |
| 10-Q | Quarterly report | View Diff | Aug 1, 2025 | |
| 10-Q | Quarterly report | View Diff | May 2, 2025 | |
| 10-K | Annual report | View Diff | Feb 21, 2025 | |
| 10-Q | Quarterly report | View Diff | Nov 1, 2024 | |
| 10-Q | Quarterly report | View Diff | Aug 2, 2024 | |
| 10-Q | Quarterly report | View Diff | May 6, 2024 |
Events
| 8-K | Regulation Fd Disclosure | Mar 26, 2026 | ||
| 8-K | Other Events | Mar 11, 2026 | ||
| 8-K | Regulation Fd Disclosure | Nov 7, 2025 | ||
| 8-K | Other Events | Sep 10, 2025 | ||
| 8-K | Regulation Fd Disclosure | Mar 27, 2025 | ||
| 8-K | Regulation Fd Disclosure | Nov 8, 2024 | ||
| 8-K | Regulation Fd Disclosure | Mar 26, 2024 | ||
| 8-K | Regulation Fd Disclosure | Nov 13, 2023 | ||
| 8-K | Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant | Sep 18, 2023 | ||
| 8-K | Termination of a Material Definitive Agreement | Apr 25, 2023 |
Registrations and Prospectuses
| 424B5 | Prospectus supplement for primary offering | Mar 6, 2026 | ||
| FWP | Free writing prospectus | Mar 5, 2026 | ||
| FWP | Free writing prospectus | Mar 5, 2026 | ||
| 424B5 | Prospectus supplement for primary offering | Mar 5, 2026 | ||
| 424B5 | Prospectus supplement for primary offering | Sep 8, 2025 | ||
| FWP | Free writing prospectus | Sep 4, 2025 | ||
| 424B5 | Prospectus supplement for primary offering | Sep 4, 2025 | ||
| S-3 | Shelf registration | Mar 14, 2025 | ||
| 424B3 | Prospectus supplement | May 6, 2024 | ||
| S-4 | Registration of securities issued in business combination transactions | Apr 9, 2024 |
Proxies
Other
| EFFECT | Notice of effectiveness | Apr 2, 2025 | ||
| CORRESP | Correspondence with SEC | Mar 27, 2025 | ||
| UPLOAD | Letter from SEC | Mar 21, 2025 | ||
| EFFECT | Notice of effectiveness | May 7, 2024 | ||
| CORRESP | Correspondence with SEC | May 2, 2024 | ||
| UPLOAD | Letter from SEC | Apr 17, 2024 | ||
| CORRESP | Correspondence with SEC | Apr 9, 2024 | ||
| EFFECT | Notice of effectiveness | Sep 14, 2016 | ||
| CORRESP | Correspondence with SEC | Sep 12, 2016 | ||
| CORRESP | Correspondence with SEC | Aug 31, 2016 |