X0202 SCHEDULE 13G 0001599731 XXXXXXXX LIVE ordinary shares, par value $0.0001 per share 06/30/2026 0002112446 JATT II Acquisition Corp. G50765109 153 Central Avenue C/O 56 Westfield NJ 07091 Rule 13d-1(b) Atika Capital Management LLC b DE 0.00 400000.00 0.00 400000.00 400000.00 N 5.1 IA OO Brad Farber b X1 0.00 400000.00 0.00 400000.00 400000.00 N 5.1 HC IN JATT II Acquisition Corp. 153 Central Avenue C/O 56 Westfield, NJ 07091 Atika Capital Management LLC Brad Farber Atika Capital Management LLC 475 Tenth Avenue, 14th Floor New York, NY 10018 Brad Farber c/o Atika Capital Management LLC 475 Tenth Avenue, 14th Floor New York, NY 10018 Atika Capital Management LLC - Delaware Brad Farber - United States N IA HC Atika Capital Management LLC - 400,000 Brad Farber - 400,000 Atika Capital Management LLC - 5.1% Brad Farber - 5.1% Atika Capital Management LLC - 0 Brad Farber - 0 Atika Capital Management LLC - 400,000 Brad Farber - 400,000 Atika Capital Management LLC - 0 Brad Farber - 0 Atika Capital Management LLC - 400,000 Brad Farber - 400,000 Y N All of the securities reported in this Schedule 13G are directly owned by advisory clients of Atika Capital Management LLC. None of those advisory clients may be deemed to beneficially own more than 5% of the ordinary shares, par value $0.0001 per share. N Please see Exhibit B attached hereto. Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. Exhibit A - Joint Filing Agreement Exhibit B - Control Person Identification Atika Capital Management LLC /s/ Brad Farber 08/14/2026 Brad Farber /s/ Brad Farber 08/14/2026