---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-242590"
form_type: "8-K"
ticker: "PTY"
cik: "0001190935"
company_name: "PIMCO CORPORATE & INCOME OPPORTUNITY FUND"
filed_at: "2023-09-26T23:59:59+00:00"
generated_at: "2026-06-10T08:32:14.101834+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# PIMCO Corporate & Income Opportunity Fund adds Giang Bui as co-portfolio manager effective Oct 2, 2023

## Summary
- Giang Bui appointed co-portfolio manager alongside Alfred T. Murata and Mohit Mittal, effective October 2, 2023.
- Bui has 24 years of investment experience; focuses on structured products and CLOs.
- Fund's prospectus and SAI updated to reflect three jointly responsible portfolio managers.
- No ownership of fund shares disclosed by any of the three portfolio managers.

## SEC filing metadata
- accession: 0001193125-23-242590
- form_type: 8-K
- ticker: PTY
- cik: 0001190935
- company_name: PIMCO CORPORATE & INCOME OPPORTUNITY FUND
- filed_at: 2023-09-26T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1190935/000119312523242590/0001193125-23-242590-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1190935/000119312523242590/d521504d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-242590
- JSON: https://secwatch.observer/filing/0001193125-23-242590.json
- Plain text: https://secwatch.observer/filing/0001193125-23-242590.txt

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