EXHIBIT 99.1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned agree to the joint filing on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the Common Stock of 4D Molecular Therapeutics, Inc. and further agree that this agreement be included as an exhibit to such filing. Each party to the agreement expressly authorizes each other party to file on its behalf any and all amendments to such statement. Each party to this agreement agrees that this joint filing agreement may be signed in counterparts.

In evidence whereof, the undersigned have caused this Agreement to be executed on their behalf this 14th day of February, 2025.

Venrock Healthcare Capital Partners III, L.P.


By:

VHCP Management III, LLC

Its:

General Partner


By:

/s/ Sherman G. Souther

Name: Sherman G. Souther

Its: Authorized Signatory



Venrock Healthcare Capital Partners EG, L.P.


By:

VHCP Management EG, LLC

Its:

General Partner


By:

/s/ Sherman G. Souther

Name: Sherman G. Souther

Its: Authorized Signatory


VHCP Co-Investment Holdings III, LLC


By:

VHCP Management III, LLC

Its:

Manager


By:

/s/ Sherman G. Souther

Name: Sherman G. Souther

Its: Authorized Signatory




VHCP Management III, LLC


By:

/s/ Sherman G. Souther

Name: Sherman G. Souther

Its: Authorized Signatory



VHCP Management EG, LLC


By:

/s/ Sherman G. Souther

Name: Sherman G. Souther

Its: Authorized Signatory


Nimish Shah


/s/ Sherman G. Souther

Sherman G. Souther, Attorney-in-fact



Bong Koh


/s/ Sherman G. Souther

Sherman G. Souther, Attorney-in-fact







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