[craftyguy]

I would like to find something like this that is usable by Libreoffice Calc.

[Cthulhu_]

It looks like a simple html table, I think LibreOffice might be able to parse that. Else, it should be relatively trivial to change the output to e.g. csv which can be imported.

As for an alternative, and I don't know the options here, but maybe a plugin could be made that pulls the data into Calc itself.

[jknz]

Select all and copy-paste from the webpage http://toddwschneider.com/stocks/ in chrome into Libreoffice Calc is parsed as expected.