GW&K Investment Management Increases Stake in UMB Financial

Institutional investor boosts holding in Kansas City-based bank by 20%

Published on Mar. 5, 2026

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GW&K Investment Management LLC increased its stake in UMB Financial Corporation (NASDAQ:UMBF) by 20% during the third quarter, according to a recent SEC filing. The firm now owns 742,958 shares of the bank's stock, representing approximately 0.98% of UMB Financial's total shares outstanding.

Why it matters

UMB Financial is a major regional bank headquartered in Kansas City, Missouri, with a diversified business model spanning commercial and consumer banking, wealth management, and other financial services. The increase in GW&K's position suggests the institutional investor sees growth potential in the bank's stock.

The details

According to the filing, GW&K Investment Management purchased an additional 123,726 shares of UMB Financial during the third quarter, bringing its total position to 742,958 shares. This represents a 20% increase in the firm's holding of the bank's stock compared to the prior quarter.

  • GW&K Investment Management filed the 13F report disclosing the increased stake on March 5, 2026.

The players

GW&K Investment Management LLC

An institutional investment management firm that oversees approximately $55 billion in client assets.

UMB Financial Corporation

A diversified financial services holding company headquartered in Kansas City, Missouri, with a principal banking subsidiary, UMB Bank, N.A.

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The takeaway

The increased stake by GW&K Investment Management in UMB Financial suggests the institutional investor sees continued growth potential in the Kansas City-based bank's diversified business model and regional market presence.