Company: TCPA
Filing Date: 2025-02-14
Form Type: 40-F
Source: 0001232384-25-000018
Chunk: 1

Company: TRANSCANADA PIPELINES LTD
Filing Date: 2025-02-14
Form: 40-F
Chunk 1
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 registered or to be registered pursuant to Section 12(g) of the Act: None

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

#### Debt Securities of TransCanada PipeLines Limited
For annual reports, indicate by check mark the information filed with this Form:

| ☒ |     | Annual information form |     | ☒ |     | Audited annual financial statements |

Indicate the number of outstanding shares of each of the issuer's classes of capital or common stock as of the close of the period covered by the Annual report.

#### At December 31, 2024, 1,039,095,489common shares;
<div align='center'>18,424,004 Cumulative Redeemable First Preferred Shares, Series 1;

3,575,996 Cumulative Redeemable First Preferred Shares, Series 2;

9,997,177 Cumulative Redeemable First Preferred Shares, Series 3;

4,002,823 Cumulative Redeemable First Preferred Shares, Series 4;

12,070,593 Cumulative Redeemable First Preferred Shares, Series 5;

1,929,407 Cumulative Redeemable First Preferred Shares Series 6;

24,000,000 Cumulative Redeemable First Preferred Shares Series 7;

16,702,797 Cumulative Redeemable First Preferred Shares Series 9;

1,297,203 Cumulative Redeemable First Preferred Shares Series 10; and

10,000,000 Cumulative Redeemable First Preferred Shares, Series 11

of TC Energy Corporation were issued and outstanding.

At December 31, 2024, 992,720,977common shares of TransCanada PipeLines Limited,

which were all owned by TC Energy Corporation, were issued and outstanding.</div>

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act during the preceding 12 months (or such shorter period that the Registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such