Company: HYNLY
Filing Date: 2025-02-20
Form Type: 40-F
Source: 0001712356-25-000012
Chunk: 0

Company: Hydro One Ltd
Filing Date: 2025-02-20
Form: 40-F
Chunk 0
---
### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### FORM 40-F
| ☐ |     | REGISTRATION STATEMENT PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 |

#### OR
| ☒ |     | ANNUAL REPORT PURSUANT TO SECTION 13(a) OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

| For the fiscal year endedDecember 31, 2024 |     | Commission File Number333-225519-01 |

#### Hydro One Limited
<div align='center'>(Exact name of Registrant as specified in its charter)</div>

| Ontario, Canada                   |     |                         4911 |     | Not Applicable        |
| (Province or other jurisdiction   
 of incorporation or organization) |     | -Primary Standard Industrial 
   Classification Code Number |     | -I.R.S. Employer      
 Identification Number |

#### 483 Bay Street

#### South Tower, 8th Floor

#### Toronto, Ontario M5G 2P5

#### Canada
<div align='center'>( 416) 345-5000

(Address and telephone number of Registrant’s principal executive offices)</div>

#### C T Corporation System

#### 28 Liberty St., New York, NY 10005
<div align='center'>( 212) 894-8940

(Name, address, (including zip code) and telephone number (including area code)</div>

#### of agent for service in the United States)
<div align='center'>Securities registered or to be registered pursuant to Section 12(b) of the Act: Not applicable

Securities registered or to be registered pursuant to Section 12(g) of the Act: Not applicable

Securities for which there is a reporting obligation pursuant to Section 15(d)of the Act:</div>

#### Title of Class: Debt Securities
<div align='center'>Information filed with this Form:</div>

| ☒ | Annual Information Form |     | ☒ | Audited annual financial statements |

<div align='center'>Number of outstanding shares of each of the issuer’s classes of capital or common stock as of December 31, 2024:</div>

#### 599,435,650Common Shares outstanding

#### 0 (Nil) Series 1 Preferred Shares

#### 0 (Nil) Series 2 Preferred Shares
Indicate by check mark