Private equity firms supplanted corporations as investment banking's most important clients because their business model requires continuous deal-making. Unlike a public company that might do a deal every few years, PE funds are structured to constantly buy and sell assets, creating a steady, high-volume pipeline for banks.

William Hockey, Plaid's founder, started his new company Column by purchasing a chartered bank with his own money. This gives him a massive advantage over competitors, as he owns the entire financial stack, enabling better economics, control, and credibility from day one.

While large investment banks are essential for major transactions, mid-tier banks are often better partners for proactively sourcing carve-out opportunities. They typically have to hustle more for deals, resulting in deeper, more personal relationships within potential sellers, which can unlock the off-market conversations that larger banks might miss.

The modern M&A and advisory business exploded in the 1980s due to a confluence of factors, critically including a rule change that legalized stock buybacks. This, along with deregulation and a new focus on shareholder value, created immense demand for transaction-focused bankers to help companies manage their balance sheets.

Acquired extended its business model by launching a fund that invests exclusively in its private company sponsors. The rigorous process of selecting a brand-aligned sponsor effectively serves as investment diligence, creating a powerful flywheel where business partnerships become financial ones.

Fairfax employs a clever M&A strategy called the "cannibal buy-up." When an asset is too large to acquire outright, they partner with another firm. Later, when financially stronger, they use their capital to buy out the partner's stake, allowing them to gain 100% control of a valuable asset over time.

Large investment banks were hesitant to fully embrace private equity due to internal conflicts and fear of competing with clients. This institutional ambivalence created a massive opportunity for smaller, more focused firms like DLJ to dominate a new market.

Instead of focusing on product-specific revenue, PNC's corporate bank is organized around client relationships. This organizational design incentivizes bankers to patiently build relationships and win share over time, even if it means calling on a target client for 10 years.

When a corporate client is acquired by private equity and requires higher leverage, the bank risks losing the entire relationship. By partnering with a private credit fund to handle the loan, the bank can keep the client and all associated high-margin fee-based services like treasury management.