The question of mid-offering period changes to employee stock purchase plans (ESPPs) has been coming up with unusual frequency, in some cases due to stock price volatility causing an earlier-than-expected shortage of shares and in others due to companies desiring to quickly make their plans more competitive in the ongoing battle for talent. Impact of a Modification of a Section 423 ESPP Option But a mid-offering change to the terms of a Code[1] Section 423…