6-K

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 under

the Securities Exchange Act of 1934

For the month of February 2019

Commission File Number:  333-225606

ALTAGAS LTD.

(Translation of Registrant’s Name into English)

1700, 355 — 4th Avenue S.W., Calgary, Alberta, T2P 0J1, Canada

(Address of Principal Executive Offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F o                                                                        Form 40-F x

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):  o

The following exhibit to this report on Form 6-K is furnished, not filed, and will not be incorporated by reference into any registration statement filed by the registrant under the Securities Act of 1933, as amended.

EXHIBIT INDEX

99.1.A copy of the registrant’s Notice of Meeting and Record Date dated February 12, 2019.

2

Signature

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	ALTAGAS LTD.
Date: February 13, 2019
	By:	/s/ Brad Grant
		Name: Brad Grant
		Title: Executive Vice President, Chief Legal Officer

3

EX-99.1

Exhibit 99.1

530-8th Avenue SW, 6th floor
Calgary AB, T2P 3S8
www.computershare.com

February 12, 2020

To:All Canadian Securities Regulatory Authorities

Toronto Stock Exchange

Dear Sirs/Madames:

Subject: ALTAGAS LTD.

We advise of the following with respect to the upcoming Meeting of Security Holders for the subject Issuer:

Meeting Type:	Annual General Meeting
Record Date for Notice of Meeting:	March 12, 2020
Record Date for Voting (if applicable):	March 12, 2020
Beneficial Ownership Determination Date:	March 12, 2020
Meeting Date:	May 1, 2020
Meeting Location (if available):	Calgary, AB
Issuer sending proxy related materials directly to NOBO:	No
Issuer paying for delivery to OBO:	Yes

Notice & Access (NAA) Requirements:
NAA for Beneficial Holders	Yes
Beneficial Holder Stratification Criteria	Not Applicable
NAA for Registered Holders	Yes
Registered Holder Stratification Criteria	Not Applicable

Voting Security Details:

Description	CUSIP Number	ISIN
COMMON	021361100	CA0213611001

Sincerely,

Computershare Trust Company of Canada

Agent for ALTAGAS LTD.