To expand on @ballardw's reply, the statistics that you are looking for are called "parameter estimates." That should help you with internet searches.
In addition to using the OUTEST= option, you should add the NOPRINT option to the PROC REG statement so that the screen is not filled with hundreds of tables/graphs that you don't need to see. The following statements create an output data set called ParamEst that contains all parameter estimates. You can use a WHERE clause to restrict the output it you only want the estimates for s_score.
proc reg data=b5 outest=ParamEst noprint;
model mtb = size roa s_score / adjrsq;
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