This came after a quick search, which seems to confirm that if a client had, say, 100 shares of Amazon in a brokerage account at LB he would still have those: a brokerage must separate retail customers investments in other securities from its own money and funds.

https://www.kiplinger.com/article/investing/T023-C000-S001-w...

However, reading more I am not as sure that individual investors holding money in LB investing in other (non-LB) securities did not suffer. I am not an expert and cannot always distinguish between reputable sources and conspiracy theorists. Can someone provide some good references?