SCHEDULE 13G/A 0001466153 XXXXXXXX LIVE 2 Ordinary Shares 02/27/2026 0001060955 ICON plc G4705A100 South County Buisness Park Leopardstown, Dublin 18 L2 D18 X5R3 Rule 13d-1(b) Artisan Partners Asset Management Inc. DE 0 8131735 0 8361303 8361303 N 10.9 HC (g) Artisan Partners Holdings LP is the sole limited partner of Artisan Partners Limited Partnership and the sole member of Artisan Investments GP LLC; Artisan Investments GP LLC is the general partner of Artisan Partners Limited Partnership; Artisan Partners Asset Management Inc. is the general partner of Artisan Partners Holdings LP. Artisan Partners Holdings LP DE 0 8131735 0 8361303 8361303 N 10.9 HC (g) Artisan Partners Holdings LP is the sole limited partner of Artisan Partners Limited Partnership and the sole member of Artisan Investments GP LLC; Artisan Investments GP LLC is the general partner of Artisan Partners Limited Partnership; Artisan Partners Asset Management Inc. is the general partner of Artisan Partners Holdings LP. Artisan Investments GP LLC DE 0 8131735 0 8361303 8361303 N 10.9 HC (g) Artisan Partners Holdings LP is the sole limited partner of Artisan Partners Limited Partnership and the sole member of Artisan Investments GP LLC; Artisan Investments GP LLC is the general partner of Artisan Partners Limited Partnership; Artisan Partners Asset Management Inc. is the general partner of Artisan Partners Holdings LP. Artisan Partners Limited Partnership DE 0 8131735 0 8361303 8361303 N 10.9 IA (e) Artisan Partners Limited Partnership is an investment adviser registered under section 203 of the Investment Advisers Act of 1940. (g) Artisan Partners Holdings LP is the sole limited partner of Artisan Partners Limited Partnership and the sole member of Artisan Investments GP LLC; Artisan Investments GP LLC is the general partner of Artisan Partners Limited Partnership; Artisan Partners Asset Management Inc. is the general partner of Artisan Partners Holdings LP. Artisan Partners Funds, Inc. WI 0 6449466 0 6449466 6449466 N 8.4 IC (d) Artisan Partners Funds, Inc. is an Investment Company under section 8 of the Investment Company Act. ICON plc South County Business Park, Leopardstown, Dublin 18, D18 X5R3, Ireland Artisan Partners Asset Management Inc. ("APAM") Artisan Partners Holdings LP ("Artisan Holdings") Artisan Investments GP LLC ("Artisan Investments") Artisan Partners Limited Partnership ("APLP") Artisan Partners Funds, Inc. ("Artisan Funds") APAM, Artisan Holdings, Artisan Investments, APLP, and Artisan Funds are all located at: 875 East Wisconsin Avenue, Suite 800 Milwaukee, WI 53202 APAM is a Delaware corporation; Artisan Holdings is a Delaware limited partnership; Artisan Investments is a Delaware limited liability company; APLP is a Delaware limited partnership; Artisan Funds is a Wisconsin corporation N IV IA HC 8,361,303 10.9% (based on 79,359,932 shares outstanding as of 11/03/2025) None 8,131,735 None 8,361,303 Y N The shares reported herein have been acquired on behalf of discretionary clients of APLP; as reported herein, APLP holds 8,361,303 shares, including 6,449,466 shares on behalf of Artisan Funds. Persons other than APLP are entitled to receive all dividends from, and proceeds from the sale of, those shares. Y 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 Index Exhibit 1 - Joint Filing Agreement dated 3/6/2026 Artisan Partners Asset Management Inc., Artisan Partners Holdings LP, Artisan Investments GP LLC, Artisan Partners Limited Partnership, and Artisan Partners Funds, Inc. Artisan Partners Asset Management Inc. /s/ Gregory K. Ramirez 03/06/2026 Artisan Partners Holdings LP /s/ Gregory K. Ramirez 03/06/2026 Artisan Investments GP LLC /s/ Gregory K. Ramirez 03/06/2026 Artisan Partners Limited Partnership /s/ Gregory K. Ramirez 03/06/2026 Artisan Partners Funds, Inc. /s/ Gregory K. Ramirez 03/06/2026