Key insight: First Interstate BancSystem reaffirmed its strategic plan to pursue organic growth, not bank M&A, as it faces pressure from a high-profile activist investor.What's at stake: The bank seemed to align itself with some of the activist group's demands, but it did not outright commit to certain items, such as a Common Equity Tier 1 ratio of 10.3%.Forward look: The two sides are scheduled to meet to discuss a resolution.First Interstate BancSystem, one of several regional banks currently in the cross ...