Janus Henderson Group Plc - Jul 2, 2024 Form 3 Insider Report for ARCA biopharma, Inc. (ABIO)

Role: 10%+ Owner
Signature: /s/ Michelle Rosenberg, CAO, General Counsel & Company Secretary
Stock symbol: ABIO
Transactions as of: Jul 2, 2024
Transactions value $: $0
Form type: 3
Date filed: 7/12/2024, 07:10 PM
Next filing: Jul 26, 2024

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	ABIO	Common Stock						1.48M	Jul 2, 2024	By Fund	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The securities reported are beneficially owned directly by Janus Henderson Biotech Innovation Master Fund Ltd. (the "Fund"). Janus Henderson Group plc has a 100% ownership stake in Janus Henderson Investors US LLC, which serves as the investment advisor to the Fund, and may therefore be deemed a beneficial owner of the securities reported herein. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any.

Content

The securities reported are beneficially owned directly by Janus Henderson Biotech Innovation Master Fund Ltd. (the "Fund"). Janus Henderson Group plc has a 100% ownership stake in Janus Henderson Investors US LLC, which serves as the investment advisor to the Fund, and may therefore be deemed a beneficial owner of the securities reported herein. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any.