Horizons ETF Trust I DEFA14A Additional proxy soliciting materials

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

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o	Definitive Proxy Statement
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o	Soliciting Material Pursuant to §240.14a-12

Horizons ETF Trust I

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SHAREHOLDER ID: 123456789

IMPORTANT NOTICE: WE NEED YOUR HELP

December 7, 2018

Dear Valued Shareholder:

We need your help!We recently sent you proxy material for a very important upcoming meeting of Horizons ETF shareholders. We also sent you a follow-up letter reminding you to vote.Our records indicate that we have not yet received your proxy voting instructions.We would not bother you with this communicationunless your votewas truly important.

Please help your Fund by casting your proxy vote today

Details of the special meeting, scheduled for December 19th, are described in the proxy statement that has been sent to all shareholders, and are also available online at https://proxyonline.com/docs/horizonsETFs.pdf

Thank you in advance for your attention to this matter.

How do I vote?

	(1)	By mailwith the enclosed proxy card and postage-prepaid envelope;
	(2)	Online, as directed in the proxy voting instructions, or by email toFundProxy@Horizonsetfs.com;
	(3)	By calling 800-431-9629; or
	(4)	In personat the special shareholder meeting