13G Filing: D E Shaw and Applied Optoelectronics Inc. (AAOI)

13139 Jess Pirtle Blvd.

Sugar Land, TX 77478

D. E. Shaw & Co., L.P.

David E. Shaw

The business address for each reporting person is:

1166 Avenue of the Americas, 9^th Floor

New York, NY 10036

D. E. Shaw & Co., L.P. is a limited partnership organized
under the laws of the state of Delaware.

David E. Shaw is a citizen of the United States of America.

If this statement is filed pursuant to Rule 13d-1(b) or 13d-2(b)
or (c), check whether the person filing is a:

Not Applicable

Ownership

D. E. Shaw & Co., L.P.:

949,364 shares

This is composed of (i) 580,569 shares in the name
of D. E. Shaw Valence Portfolios, L.L.C., (ii) 20,000 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right
to acquire through the exercise of listed call options, (iii) 342,867 shares in the name of D. E. Shaw Oculus Portfolios,
L.L.C., (iv) 1,019 shares in the name of D. E. Shaw Asymptote Portfolios, L.L.C., (v) 100 shares in the name of D. E. Shaw Heliant
Capital, L.L.C., and (vi) 4,809 shares under the management of D. E. Shaw Investment Management, L.L.C.

David E. Shaw:

949,364 shares

This is composed of (i) 580,569 shares in the name of D. E.
Shaw Valence Portfolios, L.L.C., (ii) 20,000 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through
the exercise of listed call options, (iii) 342,867 shares in the name of D. E. Shaw Oculus Portfolios, L.L.C., (iv) 1,019 shares
in the name of D. E. Shaw Asymptote Portfolios, L.L.C., (v) 100 shares in the name of D. E. Shaw Heliant Capital, L.L.C., and (vi)
4,809 shares under the management of D. E. Shaw Investment Management, L.L.C.