TRANSCANADA PIPELINES LTD

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

No description available

Free Writing Prospectus

No description available

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Registration statement or Annual report for Canadian Issuers

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Certification of approval for listing and registration on a national securities exchange

Registration of Securities on Exchange

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

No description available

No description available

Free Writing Prospectus

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

No description available

No description available

Free Writing Prospectus

Registration statement or Annual report for Canadian Issuers

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Appointment of agent for service of process and undertaking

No description available

Report of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934

Registration statement or Annual report for Canadian Issuers

Appointment of agent for service of process and undertaking

No description available

No description available

No description available

Free Writing Prospectus

Free Writing Prospectus

Registration statement or Annual report for Canadian Issuers

Appointment of agent for service of process and undertaking

Appointment of agent for service of process and undertaking

Appointment of agent for service of process and undertaking

Registration statement for securities of certain Canadian issuers

No description available

Free Writing Prospectus

No description available

Registration statement or Annual report for Canadian Issuers

Registration statement for securities of certain Canadian issuers (amendment)

Appointment of agent for service of process and undertaking

Registration statement for securities of certain Canadian issuers

No description available

Free Writing Prospectus

Registration statement for securities of certain Canadian issuers

Registration statement or Annual report for Canadian Issuers

Free Writing Prospectus

Registration statement or Annual report for Canadian Issuers

Notice of Effectiveness

Registration statement for securities of certain Canadian issuers

Notice of Effectiveness

Registration statement for securities of certain Canadian issuers

Registration statement or Annual report for Canadian Issuers

Free Writing Prospectus

Free Writing Prospectus

Registration statement or Annual report for Canadian Issuers (amendment)

Registration statement or Annual report for Canadian Issuers

Notice of Effectiveness

Registration statement or Annual report for Canadian Issuers (amendment)

Registration statement or Annual report for Canadian Issuers

Registration statement or Annual report for Canadian Issuers (amendment)

Registration statement or Annual report for Canadian Issuers

Registration statement or Annual report for Canadian Issuers (amendment)

Registration statement or Annual report for Canadian Issuers

Registration statement or Annual report for Canadian Issuers (amendment)

Registration statement or Annual report for Canadian Issuers

Registration statement or Annual report for Canadian Issuers (amendment)

Registration statement or Annual report for Canadian Issuers

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

TRANSCANADA PIPELINES LTD

TRANSCANADA CORP

TRANSCANADA PIPELINES LTD

TRANSCANADA PIPELINES LTD

TRANSCANADA PIPELINES LTD

TRANSCANADA PIPELINES LTD

TRANSCANADA PIPELINES LTD

TRANSCANADA PIPELINES LTD

TRANSCANADA PIPELINES LTD

TRANSCANADA PIPELINES LTD

TRANSCANADA PIPELINES LTD

TRANSCANADA PIPELINES LTD

TRANSCANADA PIPELINES LTD

TRANSCANADA PIPELINES LTD;TRANSCANADA CORP

TRANSCANADA PIPELINES LTD;TRANSCANADA CORP