BreachCensus

Mercadien PC Certified Public Accountants

United States of America

Mercadien PC Certified Public Accountants is an organisation in Texas. It appears on the Massachusetts Attorney General breach-notification register, the Texas Attorney General breach-notification register and the Delaware Attorney General data security breach database with 4 confirmed incidents; the most recent notice was filed on October 13, 2026.

Data as of October 17, 2026.

Confirmed incident

US-TX

Disclosed
October 13, 2026

Timeline

  1. October 13, 2026
    Reported to regulator Regulator

    TX AG breach notification: 5,219 Texas residents affected

    source
What a Texas notice means

Governed by Tex. Bus. & Com. Code §521.053. Notice to the Attorney General is required when a breach affects at least 250 Texas residents.

Note: the published count is a total, not limited to Texas residents.

Texas breach-notification register ↗

Confirmed incident

US-TX

Disclosed
February 24, 2026
Records affected
402,741

Timeline

  1. February 24, 2026
    Reported to regulator Regulator

    TX AG breach notification: 1,323 Texas residents affected

    source
Confirmed incident

US-DE

Occurred
September 17, 2025
Disclosed
February 17, 2026

Timeline

  1. February 17, 2026
    Reported to regulator Regulator

    DE AG breach notification: 1,062 Delaware residents affected

    source
  2. February 17, 2026
    Reported to regulator Regulator

    DE AG breach notification: 1,062 Delaware residents affected

    source
  3. February 17, 2026
    Reported to regulator Regulator

    DE AG breach notification: 1,062 Delaware residents affected

    source
What a Delaware notice means

Governed by 6 Del. C. §12B-102. Notice to the Attorney General is required when a breach affects more than 500 Delaware residents.

Note: the count is Delaware residents only, not a total.

Delaware breach-notification register ↗

Confirmed incident

US-MA

Disclosed
December 24, 2025

Timeline

  1. December 24, 2025
    Reported to regulator Regulator

    MA AG breach notification: 0 Massachusetts residents affected

    source
What a Massachusetts notice means

Governed by M.G.L. c. 93H. Notice to the Attorney General is required for a breach affecting any number of Massachusetts residents' personal information -- the statute sets no minimum count.

Note: the count is Massachusetts residents only, not a total.

Massachusetts breach-notification register ↗