HIO · Western Asset High Income Opportunity Fund Inc. · Holdings

$3.22 -0.03 (-0.90%)

Market Cap

$309.07M

95.10M

Volume · Oct 28 498.97K Avg daily vol (3M) 550.97K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP → See every holder of HIO: 13F, 13D and 13G, insiders and funds →

The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.

Quarter:

Holders: 115

Total Value: $117,902,861

Total Shares: 32,806,222

Showing 1–100 of 115 holdings by value · page 1 of 2

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 113 13F filers

Top Holder

35.5%

of institutional value

Top 5

59.9%

of institutional value

Top 10

74.4%

of institutional value

HHI

1,490

Broadly held

Who Holds HIO

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 112 filers, like-for-like change +2.3%; actively managed books +1.8%; index-like books +3.4%.

Holder type	Share	Filers	Change	New	Exited
Registered adviser	39.8%	66	-0.1%	6	11
Adviser	5.3%	2	-3.9%	0	0
Bank	6.4%	8	+7.7%	0	0
Broker-dealer	2.9%	1	+29.0%	0	0
Non-US	0.1%	1	+14.4%	0	0
Holding company	35.9%	3	+3.3%	0	2
Unknown	9.6%	31	+3.1%	2	2

Style	Share	Filers	Change	New	Exited
Index-like	35.5%	1	+3.4%	0	1
Systematic-like	0.5%	4	+32.9%	0	1
Concentrated	16.6%	25	+0.7%	3	2
Diversified active	47.4%	82	+1.9%	5	11
Not measured	0.0%	0	—	0	0
Unknown	0.0%	0	—	0	0

Turnover	Share	Filers	Change	New	Exited
Low turnover	79.4%	76	+2.4%	3	8
Medium turnover	14.7%	18	+4.7%	0	3
High turnover	5.8%	14	-1.7%	4	1
Unknown	0.1%	4	-82.7%	1	3
Not measured	0.0%	0	—	0	0

Holding horizon	Share	Filers	Change	New	Exited
Short horizon	1.8%	9	+1.6%	4	3
Medium horizon	8.2%	19	+1.6%	1	2
Long horizon	85.9%	78	+2.6%	3	9
Unknown	4.1%	6	-0.5%	0	1
Not measured	0.0%	0	—	0	0

13F book size	Share	Filers	Change	New	Exited
Under $1B	15.6%	33	+3.4%	2	6
$1B to $10B	20.1%	31	-5.1%	3	5
$10B to $100B	9.7%	29	+3.3%	3	3
$100B or more	54.5%	19	+4.9%	0	1
Not measured	0.0%	0	—	0	0

Client base	Share	Filers	Change	New	Exited
Individuals and high net worth	20.4%	54	-1.1%	3	10
Pooled investment vehicles	1.7%	5	+3.3%	2	1
Registered funds and BDCs	16.0%	5	+0.4%	0	0
Pension and profit sharing plans	0.1%	1	new	1	0
Corporations	0.0%	0	—	0	0
Other	1.7%	1	0.0%	0	0
Diversified	0.0%	0	—	0	0
Unknown	60.2%	46	+4.0%	2	4

Private funds	Share	Filers	Change	New	Exited
Hedge funds	3.7%	8	-2.4%	3	1
Private equity funds	2.0%	6	-0.4%	0	0
Venture capital funds	0.0%	1	0.0%	0	0
Other private funds	14.0%	6	+1.7%	1	0
No private funds	20.2%	44	-0.8%	2	9
Real estate funds	0.0%	1	-42.9%	0	1
Unknown	60.2%	46	+4.0%	2	4

Location	Share	Filers	Change	New	Exited
United States	97.6%	108	+2.6%	8	14
Outside the US	2.4%	4	-6.6%	0	1

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 1 holder with no observed 2026-03-31 13F and 1 holder with no observed 2026-06-30 13F.

Conviction and Crowding

112 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders

0.000% of filers hold it in their top 10

Mar 31, 2026: 0

Holders above 5%

median weight 0.001%

Mar 31, 2026: 0

Crowding

—

no cover-page share count is dated within about a year of the quarter end

Private-fund advisers

—

of shares outstanding

Institutional ownership

—

no cover-page share count is dated within about a year of the quarter end

Top 10 holders

74.4%

of 13F shares, Herfindahl 0.149

Active holders

+1.8%

like-for-like share change of active filers

5% stakes on record

0 13D, 2 13G (2 institutional, 0 passive, 0 exempt)

How long holders have held it value-weighted 21.1 quarters

Under 1 year 6.74% 1 to 3 years 16.2% 3 years or more 77.1% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost

$3.88

estimated per share

Mar 31, 2026: $3.90

Quarter-end price

$3.64

implied by 13F values

Estimated gain or loss

-6.1%

price against the estimated cost

Estimated at a loss

100.0%

of costed 13F value

Estimated cost covers 25.6% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Fund Ownership of HIO by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 3.02% of shares outstanding.

Fund type	Of shares outstanding	Change	Shares	Funds
Index funds	0.00%	0.00 pp	0	0
Index ETFs	3.02%	+0.08 pp	2,870,793	3
Active ETFs	1.22%	+0.24 pp	1,155,922	3
Active funds	1.04%	+0.47 pp	989,759	12
Unclassified	0.00%	0.00 pp	0	0
All registered funds	5.28%	+0.79 pp	5,016,474	18

How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 67 Adviser 2 Bank 8 Broker-dealer 1 Non-US 1 Holding company 3 Unknown 33

Showing 100 of 115

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

MORGAN STANLEY

$42,876,541

36.37%

11,779,270

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY SMITH BARNEY LLC	5,646,097	$20,551,792	47.9%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	5,749,176	$20,927,000	48.8%	Defined
BOSTON MANAGEMENT & RESEARCH	383,997	$1,397,749	3.3%	Defined

SIT INVESTMENT ASSOCIATES INC

$10,266,175

8.71%

2,820,378

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SIT FIXED INCOME ADVISORS II LLC /ADV	2,820,378	$10,266,175	100.0%	Sole

Capital Investment Advisors, LLC

$7,110,767

6.03%

2,181,217

Penserra Capital Management LLC

$6,040,398

5.12%

1,659,450

Invesco Ltd.

$4,668,274

3.96%

1,282,493

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Capital Management LLC	1,282,493	$4,668,274	100.0%	Defined

FCA CORP /TX

$4,645,054

3.94%

1,276,114

WELLS FARGO & COMPANY/MN

$3,676,996

3.12%

1,010,164

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO ADVISORS FINANCIAL NETWORK, LLC	63,369	$230,663	6.3%	Defined
WELLS FARGO CLEARING SERVICES, LLC	946,795	$3,446,333	93.7%	Defined

LPL Financial LLC

$3,530,432

2.99%

969,899

Rareview Capital LLC

$3,289,296

2.79%

903,653

RAYMOND JAMES FINANCIAL INC

$2,319,056

1.97%

637,104

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RAYMOND JAMES & ASSOCIATES	533,542	$1,942,092	83.7%	Defined
Raymond James Financial Services Advisors, Inc.	85,559	$311,434	13.4%	Defined
RAYMOND JAMES TRUST N.A.	18,003	$65,530	2.8%	Defined

UBS Group AG

$2,042,156

1.73%

561,032

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	481,036	$1,750,971	85.7%	Defined
UBS AG	79,996	$291,185	14.3%	Defined

Thrivent Financial for Lutherans

$1,998,111

1.69%

548,932

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Thrivent Asset Management, LLC	249,459	$908,030	45.4%	Defined
Held directly	299,473	$1,090,081	54.6%	Sole

JONES FINANCIAL COMPANIES LLLP

$1,933,706

1.64%

531,238

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	531,238	$1,933,706	100.0%	Sole

Kanen Wealth Management LLC

$1,785,252

1.51%

490,454

WOLVERINE ASSET MANAGEMENT LLC

$1,376,342

1.17%

378,116

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Wolverine Holdings, LLC	378,116	$1,376,342	100.0%	Defined

Chicago Partners Investment Group LLC

$1,278,575

1.08%

392,201

BANK OF AMERICA CORP /DE/

$1,110,418

0.94%

305,060

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MERRILL LYNCH, PIERCE, FENNER & SMITH INC.	305,060	$1,110,418	100.0%	Defined

Shaker Financial Services, LLC

$1,041,452

0.88%

319,464

ABSOLUTE INVESTMENT ADVISERS, LLC

$1,002,029

0.85%

307,371

RFG Advisory, LLC

$996,730

0.85%

273,827

FIRST TRUST ADVISORS LP

$958,441

0.81%

263,308

Pathway Financial Advisers, LLC

$949,964

0.81%

291,400

ENVESTNET ASSET MANAGEMENT INC

$871,579

0.74%

239,445

PIN OAK INVESTMENT ADVISORS INC

$848,331

0.72%

233,058

Fortis Group Advisors, LLC

$750,899

0.64%

206,291

Calamos Advisors LLC

$638,801

0.54%

175,495

Quarry LP

$637,458

0.54%

175,126

ROYAL BANK OF CANADA

$514,055

0.44%

141,224

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC Capital Markets, LLC	141,224	$514,055	100.0%	Defined

Cetera Investment Advisers

$466,950

0.40%

128,283

OSAIC HOLDINGS, INC.

$430,160

0.36%

118,176

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	118,176	$430,160	100.0%	Defined

COMMONWEALTH EQUITY SERVICES, LLC

$355,085

0.30%

97,551

Steward Partners Investment Advisory, LLC

$331,094

0.28%

90,960

STIFEL FINANCIAL CORP

$303,673

0.26%

83,427

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STIFEL NICOLAUS & CO INC \MO\	29,126	$106,018	34.9%	Defined
1919 Investment Counsel, LLC	54,301	$197,655	65.1%	Defined

NWF Advisory Services Inc.

$291,225

0.25%

89,333

MELFA WEALTH MANAGEMENT, INC.

$287,378

0.24%

78,950

CITADEL ADVISORS LLC

$280,411

0.24%

77,036

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	77,036	$280,411	100.0%	Defined

TRUIST FINANCIAL CORP

$262,658

0.22%

72,159

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TRUIST BANK /NC/	71,173	$259,069	98.6%	Defined
Truist Advisory Services, Inc.	986	$3,589	1.4%	Defined

KELLEHER FINANCIAL ADVISORS

$254,828

0.22%

70,008

XTX Topco Ltd

$221,785

0.19%

60,930

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	60,930	$221,785	100.0%	Defined

Stratos Wealth Partners, LTD.

$215,619

0.18%

59,236

Everstar Asset Management, LLC

$193,575

0.16%

53,180

READYSTATE ASSET MANAGEMENT LP

$191,114

0.16%

52,504

WALLED LAKE PLANNING & WEALTH MANAGEMENT, LLC

$185,585

0.16%

50,985

Concurrent Investment Advisors, LLC

$185,014

0.16%

56,753

CHOREO, LLC

$182,687

0.15%

50,189

Sage Capital Advisors,llc

$171,577

0.15%

52,631

Cambridge Investment Research Advisors, Inc.

$162,620

0.14%

44,676

Logan Stone Capital, LLC

$158,052

0.13%

43,421

Bay Colony Advisory Group, Inc d/b/a Bay Colony Advisors

$152,042

0.13%

41,770

Global Retirement Partners, LLC

$137,872

0.12%

37,877

Virtu Financial LLC

$126,890

0.11%

34,860

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Virtu Americas LLC	34,860	$126,890	100.0%	Defined

Clearstead Advisors, LLC

$125,125

0.11%

34,375

Wilson & Boucher Capital Management, LLC

$120,029

0.10%

32,975

ACCREDITED INVESTOR SERVICES, LLC

$116,039

0.10%

35,595

MERCER GLOBAL ADVISORS INC /ADV

$109,778

0.09%

30,159

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$108,774

0.09%

29,883

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
G1 EXECUTION SERVICES, LLC	29,883	$108,774	100.0%	Other

DUDLEY CAPITAL MANAGEMENT, LLC

$101,386

0.09%

31,100

Samalin Investment Counsel, LLC

$99,948

0.08%

30,659

Merit Financial Group, LLC

$97,661

0.08%

26,830

NewEdge Advisors, LLC

$94,039

0.08%

25,835

Corps Capital Advisors, LLC

$91,000

0.08%

25,000

IMC-Chicago, LLC

$89,784

0.08%

24,666

Mariner, LLC

$86,719

0.07%

23,824

Creative Planning

$86,522

0.07%

23,770

Uncommon Cents Investing LLC

$85,826

0.07%

26,327

&PARTNERS

$84,659

0.07%

23,258

FIFTH THIRD BANCORP

$83,672

0.07%

22,987

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fifth Third Bank, National Association	22,987	$83,672	100.0%	Defined

BOOTHBAY FUND MANAGEMENT, LLC

$82,289

0.07%

22,607

PARK AVENUE SECURITIES LLC

$81,920

0.07%

25,129

OPPENHEIMER & CO INC

$81,343

0.07%

24,952

CAPTRUST FINANCIAL ADVISORS

$80,309

0.07%

22,063

Advisory Services Network, LLC

$80,069

0.07%

21,997

Fiera Capital Corp

$74,649

0.06%

20,508

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fiera Capital Inc.	20,508	$74,649	100.0%	Other

Aptus Capital Advisors, LLC

$69,764

0.06%

19,166

Savvy Advisors, Inc.

$59,863

0.05%

16,446

Cape Investment Advisory, Inc.

$59,658

0.05%

18,300

TWO SIGMA SECURITIES, LLC

$58,210

0.05%

15,992

Integrated Wealth Concepts LLC

$55,237

0.05%

15,175

Lido Advisors, LLC

$53,464

0.05%

14,688

FOURPATH CAPITAL MANAGEMENT, LLC

$50,419

0.04%

15,466

Occidental Asset Management, LLC

$50,181

0.04%

13,786

EVERGREEN CAPITAL MANAGEMENT LLC

$49,102

0.04%

15,062

One Capital Management, LLC

$46,937

0.04%

12,895

JANE STREET GROUP, LLC

$46,685

0.04%

12,826

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	9,909	$36,068	77.3%	Defined
Jane Street Global Trading, LLC	2,917	$10,617	22.7%	Defined

ECLECTIC ASSOCIATES INC /ADV

$45,868

0.04%

14,070

RPg Family Wealth Advisory, LLC

$42,467

0.04%

11,667

Equitable Holdings, Inc.

$42,289

0.04%

11,618

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
EQUITABLE ADVISORS, LLC	11,618	$42,289	100.0%	Defined

Pinnacle Wealth Planning Services, Inc.

$40,016

0.03%

12,275

STEEL GROVE CAPITAL ADVISORS, LLC

$39,084

0.03%

11,989

Alpine Global Management, LLC

$38,110

0.03%

10,470

Stonebrook Private Inc.

$38,107

0.03%

10,469

Nova Wealth Management, Inc.

$38,038

0.03%

10,450

WEDBUSH SECURITIES INC

$33,082

0.03%

10,148

PNC FINANCIAL SERVICES GROUP, INC.

$32,396

0.03%

8,900

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PNC Bank, National Association	8,900	$32,396	100.0%	Defined

US BANCORP \DE\

$29,120

0.02%

8,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
US BANK NATIONAL ASSOCIATION	8,000	$29,120	100.0%	Other

Axiom Investment Management LLC

$22,766

0.02%

6,255

WPG Advisers, LLC

$19,468

0.02%

5,972

Arax Advisory Partners

$18,636

0.02%

5,120

EASTERN BANK

$15,266

0.01%

4,683

Spire Wealth Management

$11,320

0.01%

3,110

Showing the top 100 of 115 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 910068 CUSIP 95766K109 13F (30d) 27 filings 27 filers Visit website