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SPRO 8-K: Board change

Filed with the SEC on · accession 0001193125-26-455789

SPRO filed a 8-K (current report) with the SEC on Nov 10, 2026. A report of a major event, filed within four business days: results, deals, leadership changes, bankruptcy and more.

Summary of the filing

Patrick Vink, M.D. resigned from Spero Therapeutics' Board of Directors effective November 10, 2026, and the Board appointed William Ho, M.D., Ph.D. as a Class II director to fill the vacancy, effective the same date.

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Key details

Annual cash retainer for Board service$40K
Additional annual cash retainer for Development Committee service$5K
Stock option grant to purchase shares of common stock$100K
RegistrantSpero Therapeutics, Inc.
Former employer of new director william hoRAPT Therapeutics
Acquirer of rapt therapeuticsGSK
Class ii director, chair of nominating and corporate governance committee, member of compensation committeePatrick Vink, M.D.
Class ii director, member of development committeeWilliam Ho, M.D., Ph.D.

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Frequently asked questions

What did SPRO file with the SEC on Nov 10, 2026?

SPRO filed a 8-K (Board change). Patrick Vink, M.D. resigned from Spero Therapeutics' Board of Directors effective November 10, 2026, and the Board appointed William Ho, M.D., Ph.D. as a Class II director to fill the vacancy, effective the same date.

What does a board change mean for SPRO stock?

Not always. A planned retirement with a successor is usually calm; a sudden departure “effective immediately”, especially of a CFO or near results, often worries investors.

How do I read a 8-K?

A report of a major event, filed within four business days: results, deals, leadership changes, bankruptcy and more. The "Item" number tells you the topic (e.g. 2.02 results, 5.02 executive change, 1.01 new agreement, 1.03 bankruptcy). Exhibits (99.1 press release) usually hold the details.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A 8-K (current report): A report of a major event, filed within four business days: results, deals, leadership changes, bankruptcy and more.

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