---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-242651"
form_type: "8-K"
ticker: "PTY"
cik: "0001190935"
company_name: "PIMCO CORPORATE & INCOME OPPORTUNITY FUND"
filed_at: "2023-09-27T23:59:59+00:00"
generated_at: "2026-06-10T08:05:08.259360+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# PIMCO Corporate & Income Opportunity Fund removes 20% illiquid investment limit effective Oct 27, 2023

## Summary
- Effective October 27, 2023, the Fund's 20% of total assets limit on illiquid investments is removed.
- The Fund may now invest without limit in illiquid investments, per the supplement dated September 26, 2023.
- Changes update the Prospectus and SAI sections on Portfolio Contents, Illiquid Investments, and Liquidity Risk.

## SEC filing metadata
- accession: 0001193125-23-242651
- form_type: 8-K
- ticker: PTY
- cik: 0001190935
- company_name: PIMCO CORPORATE & INCOME OPPORTUNITY FUND
- filed_at: 2023-09-27T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1190935/000119312523242651/0001193125-23-242651-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1190935/000119312523242651/d505357d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-242651
- JSON: https://secwatch.observer/filing/0001193125-23-242651.json
- Plain text: https://secwatch.observer/filing/0001193125-23-242651.txt

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