PIMCO Corporate & Income Opportunity Fund
US ˙ NYSE ˙ US72201B1017

SecurityPTY / PIMCO Corporate & Income Opportunity Fund
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership817,243 shares
Latest Disclosed Value $ 9,856,473
Advisor Group Holdings, Inc. reports 0.09% increase in ownership of PTY / PIMCO Corporate & Income Opportunity Fund

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 817,243 shares of PIMCO Corporate & Income Opportunity Fund (US:PTY) valued at $9,855,951 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 816,477 shares of PIMCO Corporate & Income Opportunity Fund. This represents a change in shares of 0.09% during the quarter. The current value of the position is $9,676,157 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)
2026-05-15 2026-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 817,243 766 0.09 9,856 -6.43 0.0084
2026-02-17 2025-12-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 816,477 44,801 5.81 10,533 -4.62 0.0154
2025-11-14 2025-09-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 771,676 -15,584 -1.98 11,043 0.84 0.0155
2025-09-04 2025-06-30 13F/A-1 PIMCO CORPORATE & INCOME OPP COM 72201B101 787,260 110,393 16.31 10,952 11.88 0.0195
2025-08-13 2025-06-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 616,005 -60,862 8,852 0.0102
2025-05-12 2025-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 676,867 35,571 5.55 9,788 6.21 0.0218
2025-06-06 2024-12-31 13F/A-1 PIMCO CORPORATE & INCOME OPP COM 72201B101 641,296 -6,438 -0.99 9,216 -1.13 0.0207
2025-02-07 2024-12-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 630,526 -17,208 9,073 0.0231
2024-11-13 2024-09-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 647,734 88,526 15.83 9,322 16.47 0.0210
2024-08-13 2024-06-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 559,208 -144,823 -20.57 8,003 -23.56 0.0189
2024-05-10 2024-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 704,031 110,724 18.66 10,470 33.26 0.0234
2024-02-12 2023-12-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 593,307 -147,635 -19.93 7,856 -18.88 0.0137
2023-11-13 2023-09-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 740,942 218,026 41.69 9,685 32.26 0.0143
2023-08-21 2023-06-30 13F/A-1 PIMCO CORPORATE & INCOME OPP COM 72201B101 522,916 10,213 1.99 7,322 14.51 0.0131
2023-08-10 2023-06-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 652,916 140,213 7,192 0.0019
2023-05-12 2023-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 512,703 -17,703 -3.34 6,395 0.36 0.0120
2023-02-10 2022-12-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 530,406 32,551 6.54 6,372 8.92 0.0129
2022-11-14 2022-09-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 497,855 17,688 3.68 5,849 -2.65 0.0134
2022-08-10 2022-06-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 480,167 -39,726 -7.64 6,008 -24.46 0.0132
2022-05-04 2022-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 519,893 14,022 2.77 7,953 -4.95 0.0154
2022-02-03 2021-12-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 505,871 71,204 16.38 8,367 5.25 0.0158
2021-11-05 2021-09-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 434,667 -53,535 -10.97 7,950 -17.72 0.0166
2021-08-02 2021-06-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 488,202 71,457 17.15 9,662 26.90 0.0209
2021-05-13 2021-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 416,745 31,092 8.06 7,614 10.62 0.0183
2021-02-10 2020-12-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 385,653 -19,450 -4.80 6,883 5.37 0.0184
2020-11-12 2020-09-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 405,103 -58,588 -12.64 6,532 -9.14 0.0195
2020-08-14 2020-06-30 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 463,691 -325,755 -41.26 7,189 9.42 0.0241
2020-05-18 2020-03-31 13F PIMCO CORPORATE & INCOME OPP COM 72201B101 789,446 789,446 6,570 0.0269
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.