From the former they exfiltrated - and published - databases containing a treasure trove of personal information about their employees (names, birth dates, phone numbers, email addresses, home and work addresses, and so on).
"Our reasons for this attack are very simple. You've imprisoned or either censored our people. […] Basically, you tried to put an end to us and you got owned, there's nothing more you can say or do. You took away Topiary, Avunit, Neuron, Pwnsauce, lolspoon, Aaron Swartz shall we go on?" they wrote in a not accompanying the leak, reiterating that Operation Last Resort has been launched in memory of recently tragically deceased Internet activist Aaron Swartz.
George K. Baum and Company's website was defaced, and a link to a ZeroBin post containing details of their customers' accounts (names, email addresses, passwords and more) in clear text was published on it.
According to a post on the @OpLastResort Twitter account, the investment firm was hit because its Vice President Joshua Magden was a client of Stratfor (Strategic Forecasting Inc.), a US-based think-tank that Anonymous hacked in December 2011.
Operation Last Resort started with the DDoS attack on MIT's official website and the defacement of one of its subdomains, on which Anonymous called for a reform of "computer crime laws, and the overzealous prosecutors who use them", "reform of copyright and intellectual property law", "greater recognition of the oppression and injustices heaped daily by certain persons and institutions of authority upon anyone who dares to stand up and be counted for their beliefs, and for greater solidarity and mutual aid in response", and a "renewed and unwavering commitment to a free and unfettered internet, spared from censorship with equality of access and franchise for all."