---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-142807"
form_type: "8-K"
ticker: "SPRO"
cik: "0001701108"
company_name: "Spero Therapeutics, Inc."
filed_at: "2025-06-18T23:59:59+00:00"
generated_at: "2026-05-19T03:07:32.973060+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Spero Therapeutics stockholders approve 3M share increase to 2017 Stock Incentive Plan at annual meeting

## Summary
- Stockholders approved amendment to 2017 Plan increasing authorized shares by 3,000,000.
- Reelected Class II directors Frank E. Thomas, Patrick Vink, M.D., and Esther Rajavelu to 2028 meeting.
- Ratified PricewaterhouseCoopers as independent auditor for fiscal year 2025.
- Advisory vote on executive compensation passed with 25.2M for, 0.6M against.
- Quorum of 40,015,633 shares (71.57%) present at the meeting.

## SEC filing metadata
- accession: 0001193125-25-142807
- form_type: 8-K
- ticker: SPRO
- cik: 0001701108
- company_name: Spero Therapeutics, Inc.
- filed_at: 2025-06-18T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02, 5.07
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1701108/000119312525142807/0001193125-25-142807-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1701108/000119312525142807/d934847d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-142807
- JSON: https://secwatch.observer/filing/0001193125-25-142807.json
- Plain text: https://secwatch.observer/filing/0001193125-25-142807.txt

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