X0306 4 2021-11-05 0 0001694028 Liberty Oilfield Services Inc. LBRT 0000087347 SCHLUMBERGER LIMITED/NV 5599 SAN FELIPE, 17TH FLOOR HOUSTON TX 77056 0 0 1 0 0001840505 Schlumberger B.V. PARKSTRAAT 83 THE HAGUE P7 2514 JG NETHERLANDS 0 0 1 0 0001831486 Schlumberger Technology Corp 300 SCHLUMBERGER DRIVE SUGAR LAND TX 77478 0 0 1 0 0001840504 Schlumberger Holdings Corp 300 SCHLUMBERGER DRIVE SUGAR LAND TX 77478 0 0 1 0 Class A Common Stock, $0.01 par value 2021-11-05 4 S 0 9500000 11.50 D 56826134 D These securities are owned directly by Schlumberger Technology Corporation. Since Schlumberger Holdings Corporation controls Schlumberger Technology Corporation, it is deemed to beneficially own such securities held directly by Schlumberger Technology Corporation. Since Schlumberger B.V. controls Schlumberger Holdings Corporation, it is deemed to beneficially own such securities held directly by Schlumberger Technology Corporation. Since Schlumberger N.V. (Schlumberger Limited) controls Schlumberger B.V., it is deemed to beneficially own such securities held directly by Schlumberger Technology Corporation. Schlumberger N.V. (Schlumberger Limited), By: /s/ Samantha Blons, Assistant Secretary 2021-11-08 Schlumberger B.V., By: /s/ Eileen Hardell, Secretary 2021-11-08 Schlumberger Holdings Corporation, By: /s/ Corrie Merchant, Treasurer 2021-11-08 Schlumberger Technology Corporation, By: /s/ Corrie Merchant, Treasurer 2021-11-08