# CALAMOS CONV OPPORTUNITIES & SH BEN INT

CALAMOS CONV OPPORTUNITIES & SH BEN INT is a security (CUSIP 128117108) tracked across SEC portfolio filings. 152 institutional managers reported $200.1M on Form 13F as of 2026-06-30; 1 registered fund positions totaling $591K via N-PORT as of 2026-03-31.

## Summary

- Issuer: CALAMOS CONV OPPORTUNITIES &
- Class: SH BEN INT
- CUSIP: 128117108
- Asset category: EC
- 13F holders: 152
- 13F value: $200.1M
- 13F period: 2026-06-30
- N-PORT fund positions: 1
- N-PORT value: $591K
- N-PORT report: 2026-03-31

## Top institutional holders (Form 13F)

_Showing 15 of 152 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| BANK OF AMERICA CORP /DE/ | CHARLOTTE, NC | $28.2M | 2,629,637 |
| UBS Group AG | Zurich, V8 | $25.5M | 2,378,396 |
| MORGAN STANLEY | NEW YORK, NY | $15.2M | 1,413,476 |
| D.A. DAVIDSON & CO. | GREAT FALLS, MT | $14.9M | 1,105,418 |
| WELLS FARGO & COMPANY/MN | SAN FRANCISCO, CA | $14.6M | 1,358,593 |
| [COMMONWEALTH EQUITY SERVICES, LLC](https://search.stillhousedata.com/firm/8032) | WALTHAM, MA | $7.6M | 563,686 |
| [LPL Financial LLC](https://search.stillhousedata.com/firm/6413) | FORT MILL, SC | $7.2M | 673,698 |
| GUGGENHEIM CAPITAL LLC | Chicago, IL | $6.5M | 609,476 |
| Baird Financial Group, Inc. | MILWAUKEE, WI | $6.3M | 591,236 |
| [Marathon Strategic Advisors, LLC](https://search.stillhousedata.com/firm/117108) | PITTSBURGH, PA | $3.9M | 293,821 |
| [Advisors Asset Management, Inc.](https://search.stillhousedata.com/firm/46727) | Monument, CO | $3.6M | 330,954 |
| AVANTAX ADVISORY SERVICES, INC. | DALLAS, TX | $3.4M | 320,756 |
| RAYMOND JAMES FINANCIAL INC | ST. PETERSBURG, FL | $3.2M | 301,680 |
| [Creekside Partners](https://search.stillhousedata.com/firm/125401) | PETALUMA, CA | $3.2M | 237,856 |
| OPPENHEIMER & CO INC | NEW YORK, NY | $3.2M | 237,341 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| Cohen & Steers Closed-End Opportunity Fund, Inc. | Cohen & Steers Closed-End Opportunity Fund, Inc. | $591K | 16.37% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/128117108.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.