# ARROWHEAD PHARMACEUTICALS IN NOTE           1/1

ARROWHEAD PHARMACEUTICALS IN NOTE           1/1 is a security (CUSIP 04280AAC4) tracked across SEC portfolio filings. 55 institutional managers reported $651.3M on Form 13F as of 2026-06-30; 15 registered fund positions totaling $44.7M via N-PORT as of 2026-05-31.

## Summary

- Issuer: ARROWHEAD PHARMACEUTICALS IN
- Class: NOTE           1/1
- CUSIP: 04280AAC4
- Asset category: DBT
- 13F holders: 55
- 13F value: $651.3M
- 13F period: 2026-06-30
- N-PORT fund positions: 15
- N-PORT value: $44.7M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 55 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) | New York, NY | $207.2M | 200,000,000 |
| Linden Advisors LP | New York, NY | $95.8M | 92,395,000 |
| CAMDEN ASSET MANAGEMENT L P /CA | Los Angeles, CA | $47.1M | 45,500,000 |
| [LMR Partners LLP](https://search.stillhousedata.com/firm/159639) | LONDON, X0 | $36.2M | 35,000,000 |
| [Calamos Advisors LLC](https://search.stillhousedata.com/firm/105758) | NAPERVILLE, IL | $26.8M | 22,199,000 |
| [READYSTATE ASSET MANAGEMENT LP](https://search.stillhousedata.com/firm/317277) | Chicago, IL | $25.9M | 25,000,000 |
| MacKay Shields LLC | New York, NY | $24.5M | 20,457,000 |
| Context Capital Management, LLC | LAJOLLA, CA | $22.0M | 18,400,000 |
| Jump Financial, LLC | Chicago, IL | $19.3M | 18,702,000 |
| BNP PARIBAS ARBITRAGE, SNC | PARIS, I0 | $14.5M | 13,979,000 |
| STATE STREET CORP | BOSTON, MA | $14.2M | 13,700,000 |
| OAKTREE CAPITAL MANAGEMENT LP | LOS ANGELES, CA | $11.5M | 11,055,000 |
| LOOMIS SAYLES & CO L P | BOSTON, MA | $10.8M | 172,174 |
| [Polar Asset Management Partners Inc.](https://search.stillhousedata.com/firm/162681) | TORONTO, A6 | $10.4M | 10,000,000 |
| [SHENKMAN CAPITAL MANAGEMENT INC](https://search.stillhousedata.com/firm/112192) | NEW YORK, NY | $9.2M | 8,705,000 |

## 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 | $15.7M | 8.88% |
| [NYLI MacKay Convertible Fund](https://search.stillhousedata.com/fund/S000006899) | NEW YORK LIFE INVESTMENTS FUNDS | $11.0M | 61.18% |
| CALAMOS CONVERTIBLE & HIGH INCOME FUND | CALAMOS CONVERTIBLE & HIGH INCOME FUND | $3.4M | 33.42% |
| CALAMOS CONVERTIBLE OPPORTUNITIES & INCOME FUND | CALAMOS CONVERTIBLE OPPORTUNITIES & INCOME FUND | $3.1M | 32.39% |
| Calamos Dynamic Convertible & Income Fund | Calamos Dynamic Convertible & Income Fund | $2.6M | 37.48% |
| Advent Convertible & Income Fund | ADVENT CONVERTIBLE & INCOME FUND | $2.4M | 40.82% |
| Ellsworth Growth & Income Fund Ltd | Ellsworth Growth & Income Fund Ltd | $1.7M | 100.16% |
| Bancroft Fund Ltd | Bancroft Fund Ltd | $1.7M | 123.95% |
| [Putnam Convertible Securities Fund](https://search.stillhousedata.com/fund/S000005511) | Putnam Convertible Securities Fund | $1.1M | 18.77% |
| Gabelli Convertible & Income Securities Fund Inc | Gabelli Convertible & Income Securities Fund Inc | $913K | 109.40% |
| CALAMOS STRATEGIC TOTAL RETURN FUND | CALAMOS STRATEGIC TOTAL RETURN FUND | $613K | 1.76% |
| [BNY Mellon Core Plus Fund](https://search.stillhousedata.com/fund/S000059721) | BNY Mellon Absolute Insight Funds, Inc. | $342K | 1.35% |
| [Loomis Sayles Senior Floating Rate and Fixed Income Fund](https://search.stillhousedata.com/fund/S000034097) | Natixis Funds Trust II | $69K | 1.56% |
| [Franklin Alternative Strategies Fund](https://search.stillhousedata.com/fund/S000042023) | Franklin Alternative Strategies Funds | $39K | 0.66% |
| [Calamos Growth & Income Portfolio](https://search.stillhousedata.com/fund/S000006427) | CALAMOS ADVISORS TRUST/IL | $29K | 9.21% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/04280AAC4.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.