Calamos Advisors LLC
Position in HIO — Western Asset High Income Opportunity Fund Inc.
CIK 1316507
NAPERVILLE, IL
Position in HIO
as of Jun 30, 2026
· filed Jul 31, 2026
Position Value
$638,801
+$44,226 QoQ
Shares Held
175,495
+7.1% QoQ
Ownership
0.185%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#26
of 113 holders
Holding Since
Dec 2025
3 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in HIO Over Time
Shares Held
Position Value (USD)
Position in Asset Management
Financial Services · as of Jun 30, 2026Calamos Advisors LLC holds $153,898,195 across 62 Asset Management names. HIO ranks #32 (0.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | STT |
State Street Corp
|
183,584 | $31,135,846 | |
| 2 | BLK |
BlackRock, Inc.
|
29,821 | $28,674,680 | |
| 3 | AMP |
Ameriprise Financial Inc
|
46,875 | $21,504,375 | |
| 4 | NTRS |
Northern Trust Corp
|
74,635 | $12,974,548 | |
| 5 | AMG |
Affiliated Managers Group, Inc.
|
35,430 | $11,989,512 | |
| 6 | BX |
Blackstone Inc.
|
91,972 | $10,822,345 | |
| 7 | DBRG |
DigitalBridge Group, Inc.
|
232,624 | $3,670,806 | |
| 8 | ETW |
Eaton Vance Tax-Managed Global Buy-Write Opportunities Fund
|
143,639 | $1,384,679 |
All Filings in HIO
Export CSV
3 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $638,801 | 175,495 | Shares | Sole | 2026-07-31 | |
| 2026-03-31 | $594,575 | 163,795 | Shares | Sole | 2026-05-04 | |
| 2025-12-31 | $535,334 | 144,295 | Shares | Sole | 2026-01-29 | |
| No filing history on record for this holder in this stock. | ||||||