Western Asset High Income Opportunity Fund Inc.
US ˙ NYSE ˙ US95766K1097

SecurityHIO / Western Asset High Income Opportunity Fund Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership5,853,092 shares
Ownership 6.20%
Morgan Stanley ownership in HIO / Western Asset High Income Opportunity Fund Inc.

2026-05-11 - Morgan Stanley has filed an SCHEDULE 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 5,853,092 shares of Western Asset High Income Opportunity Fund Inc. (US:HIO). This represents 6.2 percent ownership of the company. In their previous filing dated 2025-02-04 , Morgan Stanley had reported owning 5,482,889 shares, indicating an increase of 6.75 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2026-05-11 2026-05-11 13G 5,482,889 5,853,092 6.75 6.20 6.90
2025-02-04 2025-02-04 13G 3,884,711 5,482,889 41.14 5.80 41.46
2022-12-12 2022-12-12 13G/A 4,814,239 3,884,711 -19.31 4.10 -19.61
2022-02-09 2022-02-09 13G 5,797,520 4,814,239 -16.96 5.10 15.91
2018-02-12 2018-02-12 13G/A 6,590,521 5,797,520 -12.03 4.40 -12.00
2017-02-13 2017-02-13 13G/A 5,292,236 6,590,521 24.53 5.00 -20.63
2016-02-11 2016-02-11 13G/A 5,292,236 6.30
2015-02-17 2015-02-17 13G 5,937,708 7.10

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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 WESTERN ASSET HIGH INCOME OP COM 95766K109 11,392,747 1,759,935 18.27 41,356 15.72 0.0025
2026-05-27 2025-12-31 13F/A-1 WESTERN ASSET HIGH INCOME OP COM 95766K109 9,632,812 320,681 3.44 35,738 -0.06 0.0021
2026-02-13 2025-12-31 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 9,632,812 320,681 35,738 0.0021
2026-05-27 2025-09-30 13F/A-1 WESTERN ASSET HIGH INCOME OP COM 95766K109 9,312,131 397,447 4.46 35,759 0.78 0.0022
2025-11-14 2025-09-30 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 9,312,131 397,447 35,759 0.0022
2025-08-15 2025-06-30 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 8,914,684 961,306 12.09 35,480 12.09 0.0023
2025-05-15 2025-03-31 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 7,953,378 791,005 11.04 31,654 12.46 0.0023
2025-05-15 2024-12-31 13F/A-1 WESTERN ASSET HIGH INCOME OP COM 95766K109 7,162,373 2,211,533 44.67 28,148 40.39 0.0020
2025-02-14 2024-12-31 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 7,162,373 2,211,533 28,148 0.0020
2025-05-14 2024-09-30 13F/A-2 WESTERN ASSET HIGH INCOME OP COM 95766K109 4,950,840 -147,696 -2.90 20,051 3.22 0.0015
2025-02-14 2024-09-30 13F/A-1 WESTERN ASSET HIGH INCOME OP COM 95766K109 4,950,840 -147,696 20,051 0.0015
2024-11-14 2024-09-30 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 4,950,840 -147,696 20,051 0.0002
2025-05-14 2024-06-30 13F/A-2 WESTERN ASSET HIGH INCOME OP COM 95766K109 5,098,536 625,604 13.99 19,425 11.36 0.0015
2024-10-17 2024-06-30 13F/A-1 WESTERN ASSET HIGH INCOME OP COM 95766K109 5,098,536 625,604 19,425 0.0015
2024-08-14 2024-06-30 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 5,098,536 625,604 19,425 0.0015
2024-10-17 2024-03-31 13F/A-2 WESTERN ASSET HIGH INCOME OP COM 95766K109 4,472,932 340,145 8.23 17,444 9.35 0.0014
2024-08-16 2024-03-31 13F/A-1 WESTERN ASSET HIGH INCOME OP COM 95766K109 4,472,932 340,145 17,444 0.0002
2024-05-15 2024-03-31 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 4,472,932 340,145 17,444 0.0014
2024-08-16 2023-12-31 13F/A-1 WESTERN ASSET HIGH INCOME OP COM 95766K109 4,132,787 -1,017,983 -19.76 15,953 -14.91 0.0014
2024-02-13 2023-12-31 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 4,132,787 -1,017,983 15,953 0.0014
2023-11-15 2023-09-30 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 5,150,770 -66,791 -1.28 18,749 -4.94 0.0019
2023-08-14 2023-06-30 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 5,217,561 -56,600 -1.07 19,722 -1.85 0.0019
2023-05-15 2023-03-31 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 5,274,161 37,876 0.72 20,095 -2.85 0.0022
2023-02-14 2022-12-31 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 5,236,285 750,319 16.73 20,683 25.29 0.0023
2022-11-14 2022-09-30 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 4,485,966 -356,458 -7.36 16,508 -13.91 0.0022
2022-10-27 2022-06-30 13F/A-1 WESTERN ASSET HIGH INCOME OP COM 95766K109 4,842,424 129,816 2.75 19,176 -8.97 0.0025
2022-08-15 2022-06-30 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 4,842,424 129,816 19,176 0.0005
2022-10-27 2022-03-31 13F/A-1 WESTERN ASSET HIGH INCOME OP COM 95766K109 4,712,608 -101,631 -2.11 21,065 -15.85 0.0028
2022-05-13 2022-03-31 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 4,712,608 -101,631 21,065 0.0028
2022-02-14 2021-12-31 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 4,814,239 94,026 1.99 25,034 2.19 0.0031
2021-11-15 2021-09-30 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 4,720,213 344,999 7.89 24,498 6.05 0.0033
2021-08-23 2021-06-30 13F/A-1 WESTERN ASSET HIGH INCOME OP COM 95766K109 4,375,214 397,827 10.00 23,101 14.33 0.0030
2021-08-16 2021-06-30 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 4,375,214 397,827 23,101 0.0006
2021-05-17 2021-03-31 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 3,977,387 6,553 0.17 20,205 2.79 0.0030
2021-02-16 2020-12-31 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 3,970,834 -1,198,417 -23.18 19,656 -22.40 0.0030
2020-11-13 2020-09-30 13F WESTERN ASSET HIGH INCOME OP COM 95766K109 5,169,251 -1,146,945 -18.16 25,329 -13.20 0.0049
2020-08-14 2020-06-30 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 6,316,196 1,117,742 21.50 29,181 33.34 0.0065
2020-05-26 2020-03-31 13F/A-1 WESTERN ASSET HIGH INCM OPP COM 95766K109 5,198,454 1,189,456 29.67 21,885 7.67 0.0059
2020-05-15 2020-03-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 5,198,454 1,189,456 21,885 1,681.2242
2020-02-14 2019-12-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 4,008,998 257,493 6.86 20,326 7.29 0.0047
2019-11-14 2019-09-30 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 3,751,505 88,111 2.41 18,945 0.81 0.0050
2019-08-14 2019-06-30 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 3,663,394 138,773 3.94 18,793 10.39 0.0050
2019-05-15 2019-03-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 3,524,621 -93,225 -2.58 17,024 7.43 0.0048
2019-02-14 2018-12-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 3,617,846 -407,672 -10.13 15,846 -17.31 0.0047
2019-04-23 2018-09-30 13F/A-2 WESTERN ASSET HIGH INCM OPP COM 95766K109 4,025,518 53,087 1.34 19,162 0.08 0.0048
2018-11-20 2018-09-30 13F/A-1 WESTERN ASSET HIGH INCM OPP COM 95766K109 4,025,518 0 19,162 0.0048
2018-11-14 2018-09-30 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 4,025,518 19,162
2019-04-23 2018-06-30 13F/A-1 WESTERN ASSET HIGH INCM OPP COM 95766K109 3,972,431 57,724 1.47 19,147 1.68 0.0052
2018-08-14 2018-06-30 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 3,972,431 19,147
2019-04-23 2018-03-31 13F/A-1 WESTERN ASSET HIGH INCM OPP COM 95766K109 3,914,707 112,388 2.96 18,830 -2.32 0.0052
2018-05-14 2018-03-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 3,914,707 18,830
2019-04-23 2017-12-31 13F/A-1 WESTERN ASSET HIGH INCM OPP COM 95766K109 3,802,319 -249,659 -6.16 19,277 -7.26 0.0053
2018-02-14 2017-12-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 3,802,319 19,277
2017-11-14 2017-09-30 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 4,051,978 -182,553 -4.31 20,787 -3.17 0.0062
2017-08-11 2017-06-30 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 4,234,531 9,104 0.22 21,468 0.80 0.0065
2017-05-22 2017-03-31 13F/A-1 WESTERN ASSET HIGH INCM OPP COM 95766K109 4,225,427 -108,384 -2.50 21,297 -1.52 0.0065
2017-05-12 2017-03-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 4,225,427 21,297
2017-02-22 2016-12-31 13F/A-1 WESTERN ASSET HIGH INCM OPP COM 95766K109 4,333,811 -30,803 -0.71 21,625 -1.89 0.0071
2017-02-13 2016-12-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 4,333,811 21,625
2016-11-10 2016-09-30 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 4,364,614 875,886 25.11 22,042 28.94 0.0075
2016-08-12 2016-06-30 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 3,488,728 24,822 0.72 17,095 5.23 0.0062
2016-05-12 2016-03-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 3,463,906 29,197 0.85 16,246 0.86 0.0063
2016-02-09 2015-12-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 3,434,709 -747,732 -17.88 16,108 -17.88 0.0058
2016-02-08 2015-09-30 13F/A-1 WESTERN ASSET HIGH INCM OPP COM 95766K109 4,182,441 -378,248 -8.29 19,616 -16.49 0.0072
2015-11-09 2015-09-30 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 4,182,441 19,616
2015-08-12 2015-06-30 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 4,560,689 27,816 0.61 23,488 -2.60 0.0081
2015-05-14 2015-03-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 4,532,873 49,347 1.10 24,115 0.16 0.0089
2015-02-13 2014-12-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 4,483,526 122,857 2.82 24,076 -4.64 0.0088
2014-12-16 2014-09-30 13F/A-1 WESTERN ASSET HIGH INCM OPP COM 95766K109 4,360,669 2,560,311 142.21 25,248 131.78 0.0097
2014-11-14 2014-09-30 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 4,360,669 25,248
2014-05-13 2014-03-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 1,800,358 -437,157 -19.54 10,893 -17.90 0.0046
2014-02-13 2013-12-31 13F WESTERN ASSET HIGH INCM OPP COM 95766K109 2,237,515 203,792 10.02 13,268 9.28 0.0056
2013-11-13 2013-09-30 13F WESTERN ASSET HIGH INCOME COM 95766K109 2,033,723 19,980 0.99 12,141 1.50 0.0057
2013-08-08 2013-06-30 13F WESTERN ASSET HIGH INCOME COM 95766K109 2,013,743 2,013,743 11,962 0.0060
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.