# CSG SYS INTL INC NOTE 3.875% 9/1

CSG SYS INTL INC NOTE 3.875% 9/1 is a security (CUSIP 126349AH2) tracked across SEC portfolio filings. 25 institutional managers reported $346.9M on Form 13F as of 2026-06-30; 2 registered fund positions totaling $36.8M via N-PORT as of 2026-04-30.

## Summary

- Issuer: CSG SYS INTL INC
- Class: NOTE 3.875% 9/1
- CUSIP: 126349AH2
- Asset category: DBT
- 13F holders: 25
- 13F value: $346.9M
- 13F period: 2026-06-30
- N-PORT fund positions: 2
- N-PORT value: $36.8M
- N-PORT report: 2026-04-30

## Top institutional holders (Form 13F)

_Showing 15 of 25 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [HBK INVESTMENTS L P](https://search.stillhousedata.com/firm/115079) | DALLAS, TX | $77.6M | 63,900,000 |
| [WOLVERINE ASSET MANAGEMENT LLC](https://search.stillhousedata.com/firm/138907) | CHICAGO, IL | $63.8M | 52,387,000 |
| [Balyasny Asset Management L.P.](https://search.stillhousedata.com/firm/138111) | Chicago, IL | $60.5M | 49,679,000 |
| [TWO SIGMA INVESTMENTS, LP](https://search.stillhousedata.com/firm/137137) | New York, NY | $25.9M | 21,302,000 |
| JPMORGAN CHASE & CO | NEW YORK, NY | $23.6M | 19,346,000 |
| [TENOR CAPITAL MANAGEMENT Co., L.P.](https://search.stillhousedata.com/firm/153277) | NEW YORK, NY | $21.4M | 17,500,000 |
| WELLS FARGO & COMPANY/MN | SAN FRANCISCO, CA | $11.7M | 9,598,000 |
| STATE STREET CORP | BOSTON, MA | $10.5M | 8,617,000 |
| CSS LLC/IL | CHICAGO, IL | $9.1M | 7,500,000 |
| BlackRock, Inc. | New York, NY | $8.1M | 6,675,000 |
| KIM, LLC | WICHITA, KS | $7.3M | 6,000,000 |
| [WATER ISLAND CAPITAL LLC](https://search.stillhousedata.com/firm/113358) | New York, NY | $6.1M | 5,000,000 |
| [SSI INVESTMENT MANAGEMENT LLC](https://search.stillhousedata.com/firm/104889) | Los Angeles, CA | $6.1M | 5,000,000 |
| FMR LLC | BOSTON, MA | $5.8M | 4,773,000 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | FRANKFURT AM MAIN, 2M | $4.2M | 3,500,000 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [Calamos Market Neutral Income Fund](https://search.stillhousedata.com/fund/S000004062) | CALAMOS INVESTMENT TRUST/IL | $36.6M | 20.73% |
| [THRIVENT CONSERVATIVE ALLOCATION PORTFOLIO](https://search.stillhousedata.com/fund/S000001434) | Thrivent Series Fund, Inc. | $265K | 4.70% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/126349AH2.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.