The information on this webpage pertains to the Class B stock owned by members of Mastercard International Incorporated.

Important Information

Upcoming Blackout periods for Class B common stock conversion

Conversion and Sale Instruction Forms – No blackouts exist at this time.

Conversion and Transfer Instructions Forms – No blackouts exist at this time.

Important Notice

Effective February 20, 2018, EQ Shareowner Services (“EQ”) is Mastercard’s new Transfer Agent, Registrar, and Dividend Disbursing Agent. Shareholder records and investment information will automatically transfer to EQ.

Prior to accessing your company’s Mastercard Class B transfer agent account online, the current Mastercard Class B Shareowner contact on record must contact EQ to authenticate the account.

Shareholders who need to convert and sell or update account information must complete the appropriate forms located on the EQ website and submit them to EQ via certified mail or overnight delivery.

Contact EQ:


Shareowner Relations Specialists are available Monday – Friday, from 7:00 a.m. to 7:00 p.m. Central Standard Time.
Toll-Free: 800-837-7579
Outside the United States: 651-450-4064

Written Correspondence
EQ Shareowner Services
P.O. Box 64874
St. Paul, MN 55164

Certified and Overnight Delivery
EQ Shareowner Services
1110 Centre Pointe Curve, Suite 101
Mendota Heights, MN 55180