144 0001078582 XXXXXXXX LIVE 0001051627 AXT INC 000-24085 4281 TECHNOLOGY DR. FREMONT CA 94538 510.438.4734 YOUNG MORRIS S Officer Common Needham and Company LLC

250 Park Avenue, 10th Floor New York NY 10017

111795 12663243.24 65423184 06/02/2026 NASDAQ Common 10/28/2022 Performance Stock Award AXT Inc. N 111795 10/28/2022 Equity Compensation N Morris S Young

4281 Technology Dr. Freemont CA 94538

Common 03/02/2026 159536 6911466.45 Morris S Young

4281 Technology Dr. Freemont CA 94538

Common 03/06/2026 8300 329063.46 Morris S Young

4281 Technology Dr Freemont CA 94538

Common 03/09/2026 125893 4596655.57 Young Family Trust

4281 Technology Dr Freemont CA 94538

Common 03/10/2026 30832 1409908.37 Morris S. Young

4281 Technology Dr, Freemont CA 94538

common 03/13/2026 37905 1938018.20 Morris S. Young

4281 Technology Dr Freemont CA 94538

Common 06/01/2026 73897 8305335.56 Morris S. Young

4281 Technology Dr Freemont CA 94538

Common 06/02/2026 11806 1344339.77 06/02/2026 /s/Needham and Company LLC, on behalf of Morris S. Young