EXHIBIT A JOINT FILING AGREEMENT

EXHIBIT A

JOINT FILING AGREEMENT

The undersigned hereby agree that a single Schedule 13D (or any amendment thereto) relating to the Common Stock of Janux Therapeutics, Inc. shall be filed on behalf of each of the undersigned and that this Agreement shall be filed as an exhibit to such Schedule 13D.

Dated: September 16, 2024

AVALON VENTURES XI, L.P.			AVALON VENTURES XI GP LLC
By:	/s/ Xxxxx Xxxxxxx		By:	/s/ Xxxxx Xxxxxxx
	Name: Xxxxx Xxxxxxx			Name: Xxxxx Xxxxxxx
	Title: Authorized Signer			Title: Authorized Signer
AVALON  BIOVENTURES SPV I, L.P.			ABV SPV I GP LLC
By:	/s/ Xxxxx Xxxxxxx		By:	/s/ Xxxxx Xxxxxxx
	Name: Xxxxx Xxxxxxx			Name: Xxxxx Xxxxxxx
	Title: Authorized Signer			Title: Authorized Signer
AVALON BIOVENTURES I, LP			AVALON BIOVENTURES GP, LLC
By:	/s/ Xxxxx Xxxxxxx		By:	/s/ Xxxxx Xxxxxxx
	Name: Xxxxx Xxxxxxx			Name: Xxxxx Xxxxxxx
	Title: Authorized Signer			Title: Authorized Signer
/s/ Xxxxx Xxxxxxxx			/s/ Xxxxx Xxxxxxx
Xxxxx Xxxxxxxx			Xxxxx Xxxxxxx
/s/ Xxxxxxx Xxxxxxxx			/s/ Xxxxxx Xxxxx
Xxxxxxx Xxxxxxxx			Xxxxxx X. Xxxxx, Ph.D.
/s/ Xxxxxx Xxxxxxxx			/s/ Xxxxxxx Xxxxxxx
Xxxxxx Xxxxxxxx			Xxxxxxx Xxxxxxx, Ph.D.
/s/ Xxx Xxxxxxx
Xxx Xxxxxxx, Ph.D.

SCHEDULE A

Transaction		Seller		Date		No. Shares				Price
Open market sale of Common Stock		Avalon Ventures		9/6/2024			108,365			$	42.00
Open market sale of Common Stock		Avalon Ventures		9/10/2024			11,319			$	46.13	(1)
Open market sale of Common Stock		Avalon Ventures		9/10/2024			34,326			$	46.66	(2)
Open market sale of Common Stock		Avalon Ventures		9/12/2024			158,031			$	47.00
Open market sale of Common Stock		ABV SPV		9/6/2024			110,644			$	42.00
Open market sale of Common Stock		ABV SPV		9/10//2024			11,557			$	46.13	(1)
Open market sale of Common Stock		ABV SPV		9/10/2024			35,047			$	46.66	(2)
Open market sale of Common Stock		ABV SPV		9/12/2024			161,356			$	47.00
Open market sale of Common Stock		ABV I		9/6/2024			20,991			$	42.00
Open market sale of Common Stock		ABV I		9/10/2024			2,193			$	46.13	(1)
Open market sale of Common Stock		ABV I		9/10/2024			6,649			$	46.66	(2)
Open market sale of Common Stock		ABV I		9/12/2024			30,613			$	47.00
Open market sale of Common Stock		Xxxxxxx		9/9/2024			2,182			$	42.33	(3)
Open market sale of Common Stock		Xxxxxxx		9/9/2024			15,031			$	42.14
Open market sale of Common Stock		Xxxxxxx		9/10/24			5,359			$	45.87
Open market sale of Common Stock		Xxxxxxx		9/12/24			24,042			$	47.55
Open market sale of Common Stock		Xxxxx		9/9/2024			3,054			$	42.47
Open market sale of Common Stock		Xxxxx		9/10/24			1,096			$	46.01
Open market sale of Common Stock		Xxxxx		9/12/24			5,253			$	47.80
Open market sale of Common Stock		Xxxxxxx		9/9/24			6,142			$	48.00
Open market sale of Common Stock		Xxxxxxx		9/10/24			1,278			$	45.91
Open market sale of Common Stock		Xxxxxxx		9/12/24			6,142			$	48.00

(1) The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $45.50 to $46.47 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

(2) The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.50 to $47.02 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

(3) The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.33 to $42.39 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.