SEI Investments Officer Michael Lane Files Form 144 to Sell 2,400 Shares

Executive Summary

On September 22, 2026, Michael Lane, an Officer of SEI Investments Co ($SEIC), filed Form 144 detailing a notice of proposed sale of 2,400 common shares through Charles Schwab & Co., Inc. The aggregate market value is estimated at $246,669.00, implying a price of approximately $102.78 per share.

Key Filing Details

• Issuer: SEI INVESTMENTS CO ($SEIC)
• Filer: Michael Lane (Officer)
• Securities to be Sold: 2,400 shares of Common Stock
• Total Approximate Market Value: $246,669.00
• Source of Shares: Acquired on September 16, 2026, through a restricted stock lapse under equity compensation.
• Past 3 Months Activity: No other sales reported in the preceding three months.

Market and Trading Assessment

• Impact: Low. The planned sale represents less than 0.01% of SEI Investments Co's 120,019,182 total shares outstanding.
• Rationale: The shares originated from equity compensation that vested just days prior (September 16, 2026). Selling a portion of recently vested equity is routine executive financial planning, often associated with tax obligations or personal liquidity, and carries minimal directional signaling for the stock.