AGREEMENT CONCERNING JOINT FILING OF SCHEDULE 13D

EXHIBIT 99.19

CUSIP No. 00000X000

AGREEMENT CONCERNING JOINT FILING

OF SCHEDULE 13D

The undersigned agree as follows:

(i) each of them is individually eligible to use the Schedule 13D/A to which this Exhibit is attached, and such Schedule 13D/A is filed on behalf of each of them; and

(ii) each of them is responsible for the timely filing of such Schedule 13D/A and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other person making the filing, unless such person knows or has reason to believe that such information is inaccurate.

This Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all of which, taken together, shall constitute one and the same instrument.

Dated: November 17, 2023

	V. XXXX XXXXX
	/s/ V. Xxxx Xxxxx
	THE SECOND 810 HOLDCO LTD.
	By:	/s/ V. Xxxx Xxxxx
		Name:	V. Xxxx Xxxxx
		Title:	Director
	THE SECOND 1109 HOLDCO LTD.
	By:	/s/ V. Xxxx Xxxxx
		Name:	V. Xxxx Xxxxx
		Title:	President
	THE SIXTY TWO INVESTMENT COMPANY LIMITED
	By:	/s/ V. Xxxx Xxxxx
		Name:	V. Xxxx Xxxxx
		Title:	President
	12002574 CANADA INC.
	By:	/s/ V. Xxxx Xxxxx
		Name:	V. Xxxx Xxxxx
		Title:	President
	FFHL GROUP LTD.
	By:	/s/ V. Xxxx Xxxxx
		Name:	V. Xxxx Xxxxx
		Title:	President

	FAIRFAX FINANCIAL HOLDINGS LIMITED
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	President and Chief Operating Officer
	FAIRFAX (US) INC.
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	ODYSSEY US HOLDINGS INC.
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	ODYSSEY GROUP HOLDINGS, INC.
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	ODYSSEY REINSURANCE COMPANY
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	XXXXXX INSURANCE COMPANY
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D

	XXXX & XXXXXXX HOLDINGS CORP.
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	UNITED STATES FIRE INSURANCE COMPANY
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	THE NORTH RIVER INSURANCE COMPANY
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	RESOLUTION GROUP REINSURANCE (BARBADOS) LIMITED
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	NORTHBRIDGE FINANCIAL CORPORATION
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	FEDERATED INSURANCE COMPANY OF CANADA
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	NORTHBRIDGE GENERAL INSURANCE CORPORATION
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D

	VERASSURE INSURANCE COMPANY
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D

	ZENITH INSURANCE COMPANY
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D

	1102952 B.C. UNLIMITED LIABILITY COMPANY
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	ALLIED WORLD ASSURANCE COMPANY HOLDINGS, LTD
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	ALLIED WORLD ASSURANCE COMPANY HOLDINGS I, LTD
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	ALLIED WORLD ASSURANCE COMPANY, LTD
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	ALLIED WORLD ASSURANCE HOLDINGS (IRELAND) LTD
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D

	ALLIED WORLD ASSURANCE HOLDINGS (U.S.) INC.
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	ALLIED WORLD INSURANCE COMPANY
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D

	AW UNDERWRITERS INC.
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	ALLIED WORLD SPECIALTY INSURANCE COMPANY
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	NEWLINE HOLDINGS UK LIMITED
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D
	NEWLINE CORPORATE NAME LIMITED
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D

	NEWLINE INSURANCE COMPANY LIMITED
	By:	/s/ Xxxxx Xxxxxx
		Name:	Xxxxx Xxxxxx
		Title:	Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13D

	BRIT LIMITED
	By:	/s/ Xxxxx Xxxxxxxxx
		Name:	Xxxxx Xxxxxxxxx
		Title:	Group Chief Financial Officer
	BRIT INSURANCE HOLDINGS LIMITED
	By:	/s/ Xxxxx Xxxxxxxxx
		Name:	Xxxxx Xxxxxxxxx
		Title:	Group Chief Financial Officer
	BRIT UW LIMITED
	By:	/s/ Xxxxx Xxxxxxxxx
		Name:	Xxxxx Xxxxxxxxx
		Title:	Group Chief Financial Officer
	BRIT REINSURANCE (BERMUDA) LIMITED
	By:	/s/ Xxxxx Xxxxxxxxx
		Name:	Xxxxx Xxxxxxxxx
		Title:	Group Chief Financial Officer