William Blair Investment Management Reduces Stake in Banc of California

Asset management firm cuts holdings in regional bank by 5.7% in Q3

Published on Mar. 2, 2026

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William Blair Investment Management LLC decreased its stake in Banc of California, Inc. (NYSE:BANC) by 5.7% in the third quarter, according to a filing with the Securities and Exchange Commission. The firm owned 2,129,364 shares of the bank's stock, worth $35,241,000, at the end of the reporting period.

Why it matters

Institutional investors like William Blair play a key role in the trading activity and stock performance of regional banks like Banc of California. Changes in their holdings can signal shifts in market sentiment or investment strategies that may impact the bank's stock price and access to capital.

The details

According to the filing, William Blair sold 128,972 shares of Banc of California during the third quarter. The firm now owns 1.44% of the bank's outstanding shares. Other major institutional investors in Banc of California include Royal Bank of Canada, AQR Capital Management, and Goldman Sachs Group.

  • The filing covers the third quarter of 2026.

The players

William Blair Investment Management LLC

An asset management firm that decreased its stake in Banc of California by 5.7% in Q3 2026.

Banc of California, Inc.

A regional bank headquartered in Santa Ana, California that provides commercial banking services to middle-market businesses, professionals, real estate investors, and entrepreneurs.

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The takeaway

The reduction in William Blair's position in Banc of California reflects broader trends in the regional banking sector, where institutional investors are closely monitoring factors like loan growth, credit quality, and regulatory changes that can impact a bank's performance and valuation.