---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-058734"
form_type: "8-K"
ticker: null
cik: "0001820878"
company_name: "Aimco OP L.P."
filed_at: "2024-05-13T23:59:59+00:00"
generated_at: "2026-06-02T02:37:24.810375+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Aimco appoints Grant Thornton as new independent auditor, dismisses Ernst & Young

## Summary
- Audit Committee approved Grant Thornton as independent auditor for FY 2024, dismissing E&Y effective May 9, 2024.
- No disagreements or reportable events occurred with E&Y during fiscal years 2022-2023 and interim period.
- E&Y's prior audit reports for the two years ended Dec 31, 2023 were unqualified and not modified.
- The company did not consult Grant Thornton on any accounting, auditing, or financial reporting matters before appointment.

## SEC filing metadata
- accession: 0000950170-24-058734
- form_type: 8-K
- cik: 0001820878
- company_name: Aimco OP L.P.
- filed_at: 2024-05-13T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1820878/000095017024058734/0000950170-24-058734-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/922864/000095017024058734/aiv-20240509.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-058734
- JSON: https://secwatch.observer/filing/0000950170-24-058734.json
- Plain text: https://secwatch.observer/filing/0000950170-24-058734.txt

## Key facts
- Auditor Changes
  Aimco OP L.P. dismissed Ernst & Young LLP as its auditor.
  - Action: dismissal
  - Auditor: Ernst & Young LLP
  - Successor: Grant Thornton LLP
  source text: on May 9, 2024, in connection with the selection of Grant Thornton, the Audit Committee approved the dismissal of Ernst & Young LLP
  evidence_url: https://www.sec.gov/Archives/edgar/data/1820878/000095017024058734/0000950170-24-058734-index.htm
- Auditor Changes
  Aimco OP L.P. engaged Grant Thornton LLP as its auditor.
  - Action: engagement
  - Auditor: Grant Thornton LLP
  source text: After conducting a competitive process, on May 9, 2024, the Audit Committee of the Board of Directors (the “Audit Committee”) of Apartment Investment and Management Company (the “Company”) approved the appointment of Grant Thornton LLP (“Grant Thornton”) as the new independent registered public accounting firm for the Company and Aimco OP L.P.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1820878/000095017024058734/0000950170-24-058734-index.htm

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