---
schema_version: "secwatch.filing_event.v1"
accession: "0001722482-21-000263"
form_type: "8-K"
ticker: "AVTR"
cik: "0001722482"
company_name: "Avantor, Inc."
filed_at: "2021-11-10T23:59:59+00:00"
generated_at: "2026-06-28T10:03:42.594326+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Avantor appoints Joseph Massaro as Class II director, effective Jan 1, 2022

## Summary
- Joseph Massaro appointed as independent Class II director, filling a vacant board seat.
- He is CFO and SVP Business Operations at Aptiv; to serve on Audit and Finance Committee.
- Compensation: annual cash retainer of $75,000 (prorated) and RSU grant of $200,000 (prorated), vesting in one year.
- Appointment effective November 8, 2021; service begins January 1, 2022.

## SEC filing metadata
- accession: 0001722482-21-000263
- form_type: 8-K
- ticker: AVTR
- cik: 0001722482
- company_name: Avantor, Inc.
- filed_at: 2021-11-10T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1722482/000172248221000263/0001722482-21-000263-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1722482/000172248221000263/avtr-20211108.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001722482-21-000263
- JSON: https://secwatch.observer/filing/0001722482-21-000263.json
- Plain text: https://secwatch.observer/filing/0001722482-21-000263.txt

## Key facts
- Executive change
  Joseph Massaro was appointed as Class II Director at Avantor, Inc..
  - Action: appointed
  - Role: Class II Director
  source text: On November 8, 2021, the Board, upon the recommendation of its Nominating and Governance Committee, appointed Joseph Massaro as a Class II director with an initial term expiring at the Company’s 2022 Annual Meeting of Stockholders.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1722482/000172248221000263/0001722482-21-000263-index.htm

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