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Spero Therapeutics, Inc.

For the period ended Dec 31, 2025. Filed Mar 26, 2026.

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About this filing

A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Mar 26, 2026

SPRO$1.07+3.9%Stored close · as of Nov 9, 2026

Extracted filing text, with the paragraph anchors used by the comparison.

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Item 2. Properties

Our headquarters are located in Cambridge, Massachusetts, where we lease approximately 23,400 square feet of office space. Our lease extends through July 2027. In September 2025, we entered into sublease agreements for a portion of our lease through the remainder of its lease term. We believe that our existing facilities will be sufficient to meet our current needs.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.