4Front Ventures Corp. — AGM Information 2023

Apr 28, 2023

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April 28, 2023

To: All Canadian Securities Regulatory Authorities

Dear Sirs:

Re: 4Front Ventures Corp. ISIN: Class A Subordinate Voting Shares: CA35086B2075 CUSIP: Class A Subordinate Voting Shares: 35086B 20 7 ISSUE: Class C Multiple Voting Shares (not listed) Annual General and Special Meeting

We are pleased to confirm the details of the upcoming meeting of shareholders for 4Front Ventures Corp.:

Issuer: 4Front Ventures Corp. Type of Meeting: Annual General and Special Meeting Meeting Date: June 29, 2023 Record Date for Notice and voting: May 15, 2023 Voting securities: Class A Subordinate Voting Shares Class C Multiple Voting Shares Issuer sending materials directly to NOBO: Yes Issuer to pay for delivery of materials to OBO: No Stratification: No Notice-and-Access for Registered shareholders: Yes Notice-and-Access for Beneficial shareholders: Yes

We are filing this in compliance with National Instrument 54-101, in our capacity as the agent for 4Front Ventures Corp.

Yours truly,

“Kirsten Dillon”

Kirsten Dillon Relationship Manager, Client Services

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