---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-256865"
form_type: "8-K/A"
ticker: "SPRO"
cik: "0001701108"
company_name: "Spero Therapeutics, Inc."
filed_at: "2023-10-16T23:59:59+00:00"
generated_at: "2026-06-09T23:25:57.330346+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Spero Therapeutics corrects 8-K: charter amendment was not approved; files Certificate of Correction

## Summary
- Amendment No. 1 to 8-K discloses tabulation error in October 5 annual meeting vote.
- Charter amendment proposals (officer exculpation, federal forum clause) did not receive required votes.
- Certificate of Correction filed Oct 16, 2023 to undo previously recorded charter amendment.
- Company states charter remains unchanged as a result of the correction.

## SEC filing metadata
- accession: 0001193125-23-256865
- form_type: 8-K/A
- ticker: SPRO
- cik: 0001701108
- company_name: Spero Therapeutics, Inc.
- filed_at: 2023-10-16T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.03, 5.07, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1701108/000119312523256865/0001193125-23-256865-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1701108/000119312523256865/d563868d8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-256865
- JSON: https://secwatch.observer/filing/0001193125-23-256865.json
- Plain text: https://secwatch.observer/filing/0001193125-23-256865.txt

## Key facts
- Governance Changes
  Spero Therapeutics, Inc.: Filed a Certificate of Correction to undo the previously filed Charter Amendment due to a tabulation error, restoring the charter to its prior state (effective 2023-10-16).
  - Change: charter amendment
  - Effective: 2023-10-16
  source text: On October 16, 2023, the Company filed the Certificate of Correction with the Delaware Secretary to undo the Charter Amendment.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1701108/000119312523256865/0001193125-23-256865-index.htm
- Shareholder Votes
  Spero Therapeutics, Inc. shareholders rejected Amend the Charter to reflect new Delaware law provisions regarding officer exculpation and to add a federal forum selection clause.
  - Proposal: charter amendment
  - Outcome: failed
  source text: The Charter Amendment Proposals did not receive the necessary stockholder votes and were not approved.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1701108/000119312523256865/0001193125-23-256865-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.