Company: PTY
Filing Date: 2025-06-06
Form Type: 424B5
Source: 0001193125-25-137029
Chunk: 88

Company: PIMCO CORPORATE & INCOME OPPORTUNITY FUND
Filing Date: 2025-06-06
Form: 424B5
Chunk 88
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 “Management of the Fund– Investment Management Agreement” for an explanation of the unified management fee. (2) Reflects the Fund’s outstanding Preferred Shares averaged over the fiscal year ended June 30, 2023, which represented 9.88% of the Fund’s total average managed assets

(including the liquidation preference of outstanding Preferred Shares and assets attributable to reverse repurchase agreements), at an estimated annual dividend rate to the Fund of 10.14% (based on the weighted average Preferred Share dividend rate during the fiscal year ended June 30, 2023) and assumes the Fund will continue to pay Preferred Share dividends at the “maximum applicable rate” called for under the Fund’s Bylaws due to the ongoing failure of auctions for the ARPS. The actual dividend rate paid on the ARPS will vary over time in accordance with variations in market interest rates. See “Use of Leverage” and “Description of Capital Structure.” (3) Reflects the Fund’s use of leverage in the form of reverse repurchase agreements averaged over the fiscal year ended June 30, 2023, which represented 22.46% of the Fund’s total average managed assets (including assets attributable to reverse repurchase agreements), at an annual interest rate cost to the Fund of 3.55%, which is the weighted average interest rate cost during the fiscal year ended June 30, 2023. See “Use of Leverage—Effects of Leverage”. The actual amount of interest expense borne by the Fund will vary over time in accordance with the level of the Fund’s use of reverse repurchase agreements, dollar rolls and/or borrowings and variations in market interest rates. Borrowing expense is required to be treated as an expense of the Fund for accounting purposes. Any associated income or gains (or losses) realized from leverage obtained through such instruments is not reflected in the Annual Expenses table above, but would be reflected in the Fund’s performance results. (4) Other expenses are estimated for the Fund’s current fiscal year ending June 30, 2024. (5) “Dividend Cost on Preferred Shares”, including distributions on Preferred Shares, and “Interest Payments on Borrowed Funds” are borne by the Fund separately from management fees paid to PIMCO. Excluding these expenses, Total Annual Fund Operating Expenses are 0.78%. Excluding only distributions on Preferred Shares of 1.47%, Total Annual Fund Operating Expenses are 2.23%. Example The following example illustrates the expenses that you would pay on a