IGM Biosciences, Inc.: M&A transaction — IGM Biosciences acquired by Concentra Biosciences; delisted from Nasdaq

IGM Biosciences, Inc.

Tender offer closed August 13, 2025; 77.53% of shares tendered, all conditions satisfied.
Each share exchanged for $1.247 cash plus one contingent value right (CVR).
Board resigned; Kevin Tang named sole director of surviving corporation.
Trading of IGMS common stock suspended; delisting and deregistration initiated.

item 2.01 item 3.01 item 3.03 item 5.01 item 5.02 item 5.03 item 9.01

Key facts

Extracted from this filing and checked against the source text.

Governance Changes SEC 8-K Item 5.03/5.05/5.06 confidence 0.9

IGM Biosciences, Inc.: Certificate of incorporation amended and restated in its entirety.

Change: charter amendment

Exact text from the filing

the Company’s certificate of incorporation and bylaws were amended and restated in their entirety

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Governance Changes SEC 8-K Item 5.03/5.05/5.06 confidence 0.9

IGM Biosciences, Inc.: Bylaws amended and restated in their entirety.

Change: bylaw amendment

Exact text from the filing

the Company’s certificate of incorporation and bylaws were amended and restated in their entirety

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M&A Transactions SEC 8-K Item 2.01/5.01 confidence 0.9

IGM Biosciences, Inc. underwent a change of control involving Concentra Biosciences, LLC for $1.247 in cash per Share plus one non-transferable contractual contingent value right per Share (closed 2025-08-14).

Action: change of control
Counterparty: Concentra Biosciences, LLC
Consideration: $1.247 in cash per Share plus one non-transferable contractual contingent value right per Share
Closing: 2025-08-14

Exact text from the filing

Parent completed a tender offer to purchase all of the Company’s outstanding shares of common stock, par value $0.01 per share (the “Common Stock” and shares of Common Stock, “Shares”), in exchange for (i) $1.247 in cash per Share (the “Cash Amount”); plus (ii) one non-transferable contractual contingent value right per Share

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Source: SEC EDGAR

accession 0001193125-25-180763

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