Durable Capital's process includes a mandatory three-year look-back for every investment, comparing the original thesis to reality. This is crucial because while small deviations can be excused quarterly, compounding them over 12 quarters reveals significant thesis drift. The formal review forces an intellectually honest assessment of whether a slow-moving problem has become critical.

WCM realized their portfolio became too correlated because their research pipeline itself was the root cause, with analysts naturally chasing what was working. To fix this, they built custom company categorization tools to force diversification at the idea generation stage, ensuring a broader set of opportunities is always available.

To avoid confirmation bias and make disciplined capital allocation decisions, investors should treat every follow-on opportunity in a portfolio company as if it were a brand-new deal. This involves a full 're-underwriting' process, assessing the current state and future potential without prejudice from past involvement.

The pandemic prompted Blackstone's credit arm to shift from siloed business units to a unified structure. They created a horizontal CIO office to connect teams, standardize underwriting, and ensure insights from one area (e.g., private equity) inform decisions in another, creating a more resilient system.

Apollo mandates that its own teams apply the same rigorous 'clean sheet thinking' it expects from portfolio companies to all internal processes. This involves constantly questioning everything from investment screening to LP reporting, ensuring the firm itself operates with the same innovative intensity it preaches.

Instead of only celebrating wins and analyzing losses, Apollo's leadership instituted "near-miss reviews." They analyze successful investments that could have gone wrong "but for the skin of our teeth." This process uncovers hidden risks and flawed assumptions, strengthening the firm's underwriting for future deals.

Promoting an internal CIO allowed Williams to maintain its investment strategy without interruption. This preserved institutional knowledge and avoided the typical 'repointing the ship' phase that comes with external hires, ensuring immediate focus on execution.

In an industry that punishes process evolution, WCM sets the expectation with clients that their investment approach will and should change. They ask clients to hold them accountable for this evolution, reframing change from a risk into a core value proposition of continuous improvement.

The Williams College investment team's strength lies in balancing deep institutional knowledge with fresh external perspectives. Long-tenured members provide historical context, while new hires from other offices introduce new best practices and challenge complacency, preventing stagnation.