So far according to the Russian MoD, this is how many HIMARS and M270 they got since the Kursk offensive.

"In total, during the fighting in the Kursk direction the enemy lost more than 10400 military personnel, 81 tank, 41 infantry fighting vehicle, 74 armored personnel carrier, 599 armored combat vehicles, 339 cars, 76 artillery pieces, 24 multiple rocket launchers, including seven M142 HIMARS and five M270 MLRS manufactured in the USA, eight launchers of anti-aircraft missile systems two transport-charging machines, 19 electronic warfare stations, seven Counter-battery radar, two AIR DEFENSE RADAR, eight units of engineering equipment, incl. two engineering clearing machines and one mine clearance installation UR-77."