SCHEDULE 13G/A

PROS HOLDINGS INC

Common stock $0.001 par value per share · CUSIP: 74346Y103

Event date: 2025-03-31

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• BROWN ADVISORY INC

  Shares: 2,214,782 · Class: 4.7%

• BROWN INVESTMENT ADVISORY & TRUST CO

  Shares: 12,810 · Class: 0%

• BROWN ADVISORY LLC

  Shares: 2,200,576 · Class: 4.6%

• SIGNATURE FINANCIAL MANAGEMENT, INC.

  Shares: 1,396 · Class: 0%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.