Alliant Engineering, Inc.

Form 5500

ALLIANT ENGINEERING, INC.

733 Marquette Ave STE 700, Minneapolis, Mn 55402 (612) 758-3080 EIN:41-1818046 Plan Admin:Deanna Keefe

Year	Plan Name	Participants BOY/EOY	Assets BOY/EOY
2023	Plan NameALLIANT ENGINEERING, INC. EMPLOYEE BENEFIT PLAN Plan #501 Participants BOY/EOY160 / 0 Assets BOY/EOY$0 / $0	2023	ALLIANT ENGINEERING, INC. EMPLOYEE BENEFIT PLAN - Plan #501	160 / 0	$0 / $0
2022	Plan NameALLIANT ENGINEERING, INC. EMPLOYEE SAVINGS PLAN Plan #001 Participants BOY/EOY201 / 234 Assets BOY/EOY$17,329,780 / $15,856,520	2022	ALLIANT ENGINEERING, INC. EMPLOYEE SAVINGS PLAN - Plan #001	201 / 234	$17,329,780 / $15,856,520
2022	Plan NameALLIANT ENGINEERING, INCORPORATED EMPLOYEE STOCK OWNERSHIP PLAN AND TRUST Plan #002 Participants BOY/EOY135 / 146 Assets BOY/EOY$3,777,968 / $5,112,632	2022	ALLIANT ENGINEERING, INCORPORATED EMPLOYEE STOCK OWNERSHIP PLAN AND TRUST - Plan #002	135 / 146	$3,777,968 / $5,112,632
2022	Plan NameALLIANT ENGINEERING, INC. EMPLOYEE BENEFIT PLAN Plan #501 Participants BOY/EOY142 / 0 Assets BOY/EOY$0 / $0	2022	ALLIANT ENGINEERING, INC. EMPLOYEE BENEFIT PLAN - Plan #501	142 / 0	$0 / $0
2021	Plan NameALLIANT ENGINEERING, INC EMPLOYEES SAVINGS PLAN Plan #001 Participants BOY/EOY182 / 201 Assets BOY/EOY$13,494,768 / $17,329,780	2021	ALLIANT ENGINEERING, INC EMPLOYEES SAVINGS PLAN - Plan #001	182 / 201	$13,494,768 / $17,329,780
2021	Plan NameALLIANT ENGINEERING, INCORPORATED EMPLOYEE STOCK OWNERSHIP PLAN AND TRUST Plan #002 Participants BOY/EOY130 / 129 Assets BOY/EOY$2,467,932 / $3,777,968	2021	ALLIANT ENGINEERING, INCORPORATED EMPLOYEE STOCK OWNERSHIP PLAN AND TRUST - Plan #002	130 / 129	$2,467,932 / $3,777,968
2021	Plan NameALLIANT ENGINEERING, INC. EMPLOYEE BENEFIT PLAN Plan #501 Participants BOY/EOY132 / 0 Assets BOY/EOY$0 / $0	2021	ALLIANT ENGINEERING, INC. EMPLOYEE BENEFIT PLAN - Plan #501	132 / 0	$0 / $0
2020	Plan NameALLIANT ENGINEERING, INC EMPLOYEES SAVINGS PLAN Plan #001 Participants BOY/EOY157 / 181 Assets BOY/EOY$12,354,262 / $13,494,768	2020	ALLIANT ENGINEERING, INC EMPLOYEES SAVINGS PLAN - Plan #001	157 / 181	$12,354,262 / $13,494,768
2020	Plan NameALLIANT ENGINEERING, INCORPORATED EMPLOYEE STOCK OWNERSHIP PLAN AND TRUST Plan #002 Participants BOY/EOY137 / 130 Assets BOY/EOY$1,057,350 / $2,467,932	2020	ALLIANT ENGINEERING, INCORPORATED EMPLOYEE STOCK OWNERSHIP PLAN AND TRUST - Plan #002	137 / 130	$1,057,350 / $2,467,932
2020	Plan NameALLIANT ENGINEERING, INC. EMPLOYEE BENEFIT PLAN Plan #501 Participants BOY/EOY124 / 0 Assets BOY/EOY$0 / $0	2020	ALLIANT ENGINEERING, INC. EMPLOYEE BENEFIT PLAN - Plan #501	124 / 0	$0 / $0
2019	Plan NameALLIANT ENGINEERING, INC EMPLOYEES SAVINGS PLAN Plan #001 Participants BOY/EOY164 / 157 Assets BOY/EOY$8,845,669 / $12,354,262	2019	ALLIANT ENGINEERING, INC EMPLOYEES SAVINGS PLAN - Plan #001	164 / 157	$8,845,669 / $12,354,262
2019	Plan NameALLIANT ENGINEERING, INC. EMPLOYEE BENEFIT PLAN Plan #501 Participants BOY/EOY135 / 0 Assets BOY/EOY$0 / $0	2019	ALLIANT ENGINEERING, INC. EMPLOYEE BENEFIT PLAN - Plan #501	135 / 0	$0 / $0
2019	Plan NameALLIANT ENGINEERING, INCORPORATED EMPLOYEE STOCK OWNERSHIP PLAN AND TRUST Plan #002 Participants BOY/EOY97 / 137 Assets BOY/EOY$0 / $0	2019	ALLIANT ENGINEERING, INCORPORATED EMPLOYEE STOCK OWNERSHIP PLAN AND TRUST - Plan #002	97 / 137	$0 / $0