Oil Service, Inc.

Form 5500

OIL SERVICE, INC.

3498 Grand Avenue, Pittsburgh, Pa 15225 (412) 771-6950 EIN:25-1315560 Plan Admin:Thomas Langston

Year	Plan Name	Participants BOY/EOY	Assets BOY/EOY
2023	Plan NameOIL SERVICE, INC. 401(K) PLAN Plan #001 Participants BOY/EOY88 / 97 Assets BOY/EOY$3,287,403 / $3,536,982	2023	OIL SERVICE, INC. 401(K) PLAN - Plan #001	88 / 97	$3,287,403 / $3,536,982
2022	Plan NameOIL SERVICE, INC. 401(K) PLAN Plan #001 Participants BOY/EOY76 / 83 Assets BOY/EOY$3,440,395 / $3,287,403	2022	OIL SERVICE, INC. 401(K) PLAN - Plan #001	76 / 83	$3,440,395 / $3,287,403
2021	Plan NameOIL SERVICE, INC. 401(K) PLAN Plan #001 Participants BOY/EOY68 / 78 Assets BOY/EOY$3,033,366 / $3,440,395	2021	OIL SERVICE, INC. 401(K) PLAN - Plan #001	68 / 78	$3,033,366 / $3,440,395
2020	Plan NameOIL SERVICE, INC. 401(K) PLAN Plan #001 Participants BOY/EOY75 / 64 Assets BOY/EOY$2,371,997 / $3,033,366	2020	OIL SERVICE, INC. 401(K) PLAN - Plan #001	75 / 64	$2,371,997 / $3,033,366
2019	Plan NameOIL SERVICE, INC. 401(K) PLAN Plan #001 Participants BOY/EOY73 / 76 Assets BOY/EOY$1,660,141 / $2,371,997	2019	OIL SERVICE, INC. 401(K) PLAN - Plan #001	73 / 76	$1,660,141 / $2,371,997