MA · News · 20260825N

Competition and Market Share

Mastercard Inc · 2026-08-25 · Importance 17 · Surprise 24

American Express reports the lowest fraud rate among major U.S. card networks, supported by its closed-loop structure and access to both cardholder and merchant data. The reporting contrasts Amex’s fraud-detection advantage with Visa and Mastercard, which rely on multiple third-party issuers and acquirers. Amex is also using artificial intelligence and machine learning to detect anomalies, prevent fraud, streamline investigations, and identify emerging fraud patterns.

Key facts

• Mastercard officer Craig Vosburg plans to sell 5,604 shares of common stock, valued at approximately $3.25 million, under Rule 144. source
• Mastercard officer Craig Vosburg plans to sell 1,839 shares of common stock, valued at $1.1 million, through Morgan Stanley Smith Barney LLC under Rule 144. source
• BOCHK Asset Management Ltd lessened its holdings in Mastercard Incorporated by 40.0% and owned 3,900 shares after selling 2,600 shares during the period. source
• Cambiar Investors LLC boosted its position in shares of Mastercard Incorporated by 21.8% and owned 99,157 shares after buying an additional 17,777 shares. source
• Diversified Enterprises LLC reduced its stake in shares of Mastercard Incorporated by 11.4% and owned 6,859 shares after selling 884 shares during the quarter. source
• This follows a prior sale of 5,604 shares for $3.3 million on August 24, 2026, executed under a 10b5-1 plan. source
• Mastercard Inc. (MA) stock rose 3.31% on August 24. source
• Both Visa and Mastercard closed at fresh record highs on August 24, with Mastercard up 3.31% to $599.86. source