So you would be in favour of an otherwise free market, but with the government breaking up companies that grow too* big? I.e., you agree excessive concentration

So you would be in favour of an otherwise free market, but with the government breaking up companies that grow too* big? I.e., you agree excessive concentration of money and power is harmful, and would be willing to compromise free market ideals to prevent it? Also, just because -some- companies can outperform larger ones in some areas, does not mean greater size does not have significant advantages. There's a good reason there's no mom&pop car manufacturers. *E.g. so big that consumers no longer have a meaningful choice, or so big that they start to benefit from monopoly pricing or price collusion, or are able to make use of anti-competitive practices, such as stores selling their own brands more prominently.