D. E. Shaw & Co SC 13G APPLIED OPTOELECTRONICS / D. E. SHAW & CO ownership change

Exhibit 3

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, each of the undersigned Reporting Persons hereby agrees to the joint filing, along with all other such Reporting Persons, on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the Common Stock, Par value $0.001 per share, of Applied Optoelectronics, Inc., and that this Agreement be included as an Exhibit to such joint filing. This Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument.

IN WITNESS WHEREOF, each of the undersigned hereby executes this Agreement as of this 15th day of January, 2025.

D. E. Shaw & Co., L.P.
By:	/s/ Daniel R. Marcus
	Daniel R. Marcus
	Chief Compliance Officer

D. E. Shaw & Co., L.L.C.
By:	/s/ Daniel R. Marcus
	Daniel R. Marcus
	Authorized Signatory

David E. Shaw
By:	/s/ Daniel R. Marcus
	Daniel R. Marcus
	Attorney-in-Fact for David E. Shaw