BreachCensus

Tennis Warehouse, LLC

United States of America

Tennis Warehouse, LLC is an organisation in Massachusetts. It appears on the Massachusetts Attorney General breach-notification register, the California Attorney General breach-notification register and the Washington State Attorney General breach-notification register with 1 confirmed incident (3 filings); the most recent notice was filed on December 18, 2021.

Data as of September 6, 2026.

Confirmed incident

Filed in MA, WA, CA and DE

The same incident was filed separately with 4 jurisdictions within a few days of each other (MA, WA, CA and DE) — shown here as one incident.

Disclosed
December 18, 2021

Timeline

  1. December 16, 2021
    Reported to regulator Regulator

    DE AG breach notification: 1,820 Delaware residents affected

    source
  2. December 17, 2021
    Reported to regulator Regulator

    WA AG breach notification: 18,228 Washington residents affected

    source
  3. December 18, 2021
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
  4. December 18, 2021
    Reported to regulator Regulator

    MA AG breach notification: 19,060 Massachusetts residents affected

    source
  5. April 12, 2022
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
What a Massachusetts notice means

Required under 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 ↗

What a Washington notice means

Required under RCW 19.255.010. Notice to the Attorney General is required when a breach affects more than 500 Washington residents.

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

Washington breach-notification register ↗

What a California notice means

Required under Cal. Civ. Code §1798.82. A copy of the notification must be sent to the Attorney General when a single breach requires notifying more than 500 California residents.

Note: no affected-count is published on this register.

California breach-notification register ↗