Company: TCPA
Filing Date: 2025-02-19
Form Type: SUPPL
Source: 0001193125-25-029207
Chunk: 50

Company: TRANSCANADA PIPELINES LTD
Filing Date: 2025-02-19
Form: SUPPL
Chunk 50
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writers                        |     | Principal Amount of Notes |
| Deutsche Bank Securities Inc.       |     | U.S.$                     |
| J.P. Morgan Securities LLC          |     | U.S.$                     |
| SMBC Nikko Securities America, Inc. |     | U.S.$                     |
| Total                               |     | U.S.$                     |

S-33

The Underwriting Agreement provides that, in consideration of the services of the
Underwriters in connection with the offering of Notes, we will pay the Underwriters a commission equal to % of the principal amount of Notes sold pursuant to the offering, for an aggregate commission payable by us of
U.S.$ . The Underwriters’ commission is payable on the closing of the offering. The offering expenses payable by us, other than the underwriting commission, are estimated to be U.S.$ and will be paid by
us from the general funds of the Corporation.

The terms of the offering were established through negotiations between us and the
Underwriters.

The obligations of the Underwriters under the Underwriting Agreement are several (and not joint or joint and several) and
may be terminated at their discretion, subject to certain conditions, following a suspension of trading on certain stock exchanges, a banking moratorium, an outbreak or escalation of hostilities or a declaration by the U.S. or Canada of a national
emergency or war, or other calamity or crisis affecting financial markets such as to make it, in the sole judgment of the representatives of the Underwriters, impractical or inadvisable to proceed with the offering, sale or delivery of the Notes as
contemplated by this prospectus supplement, and upon the occurrence of certain stated events.

If an Underwriter fails to purchase the
Notes which it has agreed to purchase, the other Underwriters may, but are not obligated to, purchase such Notes, provided that, if the aggregate principal amount of Notes not purchased is less than or equal to 10% of the aggregate principal amount
of Notes agreed to be purchased by the Underwriters, then each of the Underwriters is obligated to purchase severally the aggregate principal amount of Notes not taken up, on a pro rata basis or as they may otherwise agree as between themselves. The
Underwriters are, however, obligated to take up and pay for all Notes if any Notes are purchased under the Underwriting Agreement. The Underwriting Agreement also provides that we will indemnify the Underwriters and their respective directors,
officers, shareholders, agents and employees against certain liabilities and