---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-23-008000"
form_type: "8-K"
ticker: "OSIS"
cik: "0001039065"
company_name: "OSI SYSTEMS INC"
filed_at: "2023-01-30T23:59:59+00:00"
generated_at: "2026-06-20T06:21:40.298766+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# OSI Systems appoints Grant Thornton as auditor, replacing Moss Adams for FY23

## Summary
- Audit Committee approved Grant Thornton as independent auditor for fiscal year ending June 30, 2023.
- Effective upon filing of Form 10-Q for period ended Dec 31, 2022; competitive selection process cited.
- Moss Adams reports for FY21 and FY22 contained no adverse opinions or modifications.
- No disagreements or reportable events occurred during the audits or subsequent interim period.
- Company did not consult Grant Thornton prior to appointment on any accounting or audit matters.

## SEC filing metadata
- accession: 0001104659-23-008000
- form_type: 8-K
- ticker: OSIS
- cik: 0001039065
- company_name: OSI SYSTEMS INC
- filed_at: 2023-01-30T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1039065/000110465923008000/0001104659-23-008000-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1039065/000110465923008000/tm234483d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-23-008000
- JSON: https://secwatch.observer/filing/0001104659-23-008000.json
- Plain text: https://secwatch.observer/filing/0001104659-23-008000.txt

## Key facts
- Auditor Changes
  OSI SYSTEMS INC dismissed Moss Adams LLP as its auditor.
  - Action: dismissal
  - Auditor: Moss Adams LLP
  - Successor: Grant Thornton LLP
  source text: This action will replace Moss Adams as the Company's independent registered public accounting firm effective upon the date of the filing of the Company's Form 10-Q for the period ended December 31, 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1039065/000110465923008000/0001104659-23-008000-index.htm
- Auditor Changes
  OSI SYSTEMS INC engaged Grant Thornton LLP as its auditor.
  - Action: engagement
  - Auditor: Grant Thornton LLP
  source text: (a) Following a competitive selection process where the Audit Committee (the “Committee”) of the Board of Directors of OSI Systems, Inc. (the “Company”) invited several public accounting firms to participate, including Moss Adams LLP (“Moss Adams”), the Company’s current independent registered public accounting firm, on January 25, 2023, the Committee approved the appointment of Grant Thornton LLP (“Grant Thornton”) as the Company’s independent registered public accounting firm for the fiscal year ending June 30, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1039065/000110465923008000/0001104659-23-008000-index.htm

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