Vendor History

All vendors

Payroll and HR

Updated . Data gathered daily from official public sources.

As of Oct 26, 2026, Vendor History found breach notices or SEC cyber filings for 5 of the 11 vendors it tracks in this category: ADP (2), Heartland Payroll Solutions (1), Paychex (1), Paycor (1) and Paylocity (1), dated Jun 5, 2013 to May 9, 2024. Finding nothing in these sources does not mean nothing happened.

The 11 vendors we track in this category. Data checked Oct 26, 2026.
VendorState breach noticesSEC cyber filingsExploited flawsLatest notice or filing
ADP200Jun 8, 2015
Gusto000None found
Heartland Payroll Solutions100May 28, 2015
Insperity000None found
Justworks000None found
Paychex100May 9, 2024
Paycom000None found
Paycor100Mar 26, 2018
Paylocity100Nov 27, 2018
Rippling000None found
TriNet000None found

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Breach notices and SEC filings in this category

  1. Breach noticePaychex

    Paychex, Inc. filed a data breach notice with the California Attorney General. Breach date(s) listed: 03/22/2024.

    Source: California Attorney General

  2. Breach noticePaylocity

    Paylocity Corporation filed a data breach notice with the California Attorney General. Breach date(s) listed: 11/01/2018.

    Source: California Attorney General

  3. Breach noticePaycor

    Paycor, Inc. filed a data breach notice with the California Attorney General. Breach date(s) listed: 02/16/2018.

    Source: California Attorney General

  4. Breach noticeADP

    ADP, LLC filed a data breach notice with the California Attorney General. Breach date(s) listed: 04/07/2015, 05/18/2015.

    Source: California Attorney General

  5. Breach noticeHeartland Payroll Solutions

    Heartland Payroll Solutions, Inc. filed a data breach notice with the California Attorney General. Breach date(s) listed: 02/22/2015.

    Source: California Attorney General

  6. Breach noticeADP

    ADP filed a data breach notice with the California Attorney General.

    Source: California Attorney General

We check: California and Washington Attorney General breach notices, SEC cyber incident filings (Form 8-K, Item 1.05) and CISA's catalog of actively exploited security flaws. An empty section means we found nothing in those sources. It does not mean nothing happened. How it works