In the 5 years I spent working in front office institutional equity sales and institutional equity research (both on the buy and sell side) I never saw any coding being done - nor did I find anyone even mildly proficient in VBA, let alone any higher level language.
There really isn't any need and it's not what you are being paid to do.
On the sell side in particular, timing is of utmost importance - your pre market is spent listening to conference calls, 9am - 5 pm is spent speaking to buy side PMs, analysts or your own salemen. Post market, more conference calls. If you're lucky, by 7pm you have time to start working on your research reports... (Typically until 10pm unless its earnings season ) Which are due by 5am for publishing.
As for stock screeners, again, there is no added value here - Bloomberg, Factset, Cap IQ and Thomson 1 will parse and screen Ks and Qs for you. If you need a custom search you simply call your account manager and have them generate an application for you - the turnaround time is fairly quick.
There are some technical papers out there proposing Monte Carlo simulation techniques for equity research valuation - but again, little value add. Equity research is the farthest thing from an exact science and vanilla equities tend to be event driven and are thus non-stochastic