Timothy Keutzer's departure as Chief Operating Officer of Spero Therapeutics, Inc. was reported, effective December 31, 2026; the filing names no successor. As of October 28, 2026, Spero Therapeutics, Inc. has reported one leadership change filing to the SEC under Item 5.02 of Form 8-K, on October 27, 2026, naming 1 departure (Form 8-K, October 27, 2026).
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Spero Therapeutics, Inc. reported a change among its directors and officers to the SEC on Form 8-K, Item 5.02, on 2026-10-27. It names 1 person. Every row below is cited to the filing it comes from, and this page adds each new change as Spero Therapeutics, Inc. files it.
Timeline
| Filed | In / out | Person | Role | Effective | Source |
|---|---|---|---|---|---|
| 2026-10-27 | Out | Chief Operating Officer | 2026-12-31 | 8-K, 2026-10-27 |
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Who leads Spero Therapeutics, Inc., as last reported?
For each role that changed in the filings below, the most recent change reported. A role that did not change in these filings is not listed.
- Chief Operating Officer: Timothy Keutzer, departure reported, effective 2026-12-31 (filed 2026-10-27). No successor is named in these filings.
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Find candidates like Chief Operating Officer at Spero Therapeutics, Inc.Every change, in the filing's words
Departing: Timothy Keutzer, Chief Operating Officer, effective 2026-12-31
(b) On October 26, 2026, Spero Therapeutics, Inc. (the "Company") announced that Timothy Keutzer, the Company's Chief Operating Officer, will retire from the Company effective as of December 31, 2026 (the "Effective Date").
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Where this comes from
A public company must file a current report on Form 8-K with the SEC within four business days when a director leaves or is elected, or when its chief executive, chief financial, chief accounting or chief operating officer, or another named executive, departs or is appointed. That disclosure goes under Item 5.02 of the report.
Every change on this page is taken from one of those filings and quoted in the company's own words, with a link to the filing, so it can be checked at the source. Where a filing names the person, the role and the date a change takes effect, they are shown beside the quote. Where it does not, the quote stands on its own. A filing states what changed; it rarely states why, and neither does this page.