PIMCO Corporate & Income Opportunity Fund
US ˙ NYSE ˙ US72201B1017

SecurityPTY / PIMCO Corporate & Income Opportunity Fund
InstitutionXML Financial, LLC
Latest Disclosed Ownership1,591,047 shares
Latest Disclosed Value $ 19,188,027
XML Financial, LLC reports 0.35% decrease in ownership of PTY / PIMCO Corporate & Income Opportunity Fund

On April 16, 2026 - XML Financial, LLC filed a 13F-HR form disclosing ownership of 1,591,047 shares of PIMCO Corporate & Income Opportunity Fund (US:PTY) valued at $19,188,027 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 1,596,655 shares of PIMCO Corporate & Income Opportunity Fund. This represents a change in shares of -0.35% during the quarter. The current value of the position is $18,885,728 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-16 2026-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 1,591,047 -5,608 -0.35 19,188 -6.84 1.5481
2026-02-11 2025-12-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 1,596,655 53,314 3.45 20,597 -7.58 1.6802
2025-10-20 2025-09-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 1,543,341 30,977 2.05 22,286 5.94 1.8141
2025-07-17 2025-06-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 1,512,364 21,167 1.42 21,037 -2.44 1.8201
2025-04-22 2025-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 1,491,197 35,234 2.42 21,563 3.06 2.0110
2025-01-17 2024-12-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 1,455,963 53,557 3.82 20,922 3.68 1.9153
2024-11-01 2024-09-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 1,402,406 92,709 7.08 20,181 7.68 1.8729
2024-07-22 2024-06-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 1,309,697 125,779 10.62 18,742 6.46 1.8860
2024-05-15 2024-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 1,183,918 80,299 7.28 17,605 20.48 1.8028
2024-02-14 2023-12-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 1,103,619 141,434 14.70 14,612 16.19 1.5409
2023-11-06 2023-09-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 962,185 28,599 3.06 12,576 -3.79 1.5072
2023-08-07 2023-06-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 933,586 41,386 4.64 13,071 16.58 1.5121
2023-05-15 2023-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 892,200 339,955 61.56 11,212 69.06 1.3653
2023-02-10 2022-12-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 552,245 453,175 457.43 6,632 469.76 0.8332
2022-11-04 2022-09-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 99,070 99,070 1,164 0.1616
2022-05-02 2022-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 0 -19,470 -100.00 0 -100.00
2022-02-01 2021-12-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 19,470 -8,127 -29.45 322 -36.24 0.0388
2021-11-01 2021-09-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 27,597 -91,593 -76.85 505 -78.59 0.0674
2021-08-10 2021-06-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 119,190 1,137 0.96 2,359 9.36 0.5190
2021-05-14 2021-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 118,053 375 0.32 2,157 2.67 0.5258
2021-02-08 2020-12-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 117,678 -199 -0.17 2,101 10.52 0.5446
2020-11-13 2020-09-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 117,877 5,398 4.80 1,901 8.94 0.5933
2020-07-31 2020-06-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 112,479 29,083 34.87 1,745 62.02 0.6055
2020-05-08 2020-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 83,396 83,396 1,077 0.4651
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.